From 01bdcb626f80838f55ec2af993daef50b9c59c49 Mon Sep 17 00:00:00 2001 From: Robert Love Date: Mon, 25 Mar 2013 11:00:26 -0700 Subject: bnx2fc: Make the fcoe_cltr the SCSI host parent The fcoemon userspace daemon is searching for the a hostX under the the /sys/bus/fcoe/devices/ctlrX/ entries. When interfaces created using fcoe_sysfs and fcoe.ko this linkage is setup correctly, but bnx2fc is not doing the same thing and therefore fcoemon does not create the fcoe interface for bnx2fc. This patch sets up the correct linkage for bnx2fc such that fcoemon will work correctly with fcoe_sysfs and bnx2fc. Signed-off-by: Robert Love Acked-by: Bhanu Prakash Gollapudi --- drivers/scsi/bnx2fc/bnx2fc_fcoe.c | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-) (limited to 'drivers/scsi') diff --git a/drivers/scsi/bnx2fc/bnx2fc_fcoe.c b/drivers/scsi/bnx2fc/bnx2fc_fcoe.c index 2daf4b0..cc4791c 100644 --- a/drivers/scsi/bnx2fc/bnx2fc_fcoe.c +++ b/drivers/scsi/bnx2fc/bnx2fc_fcoe.c @@ -2133,6 +2133,7 @@ static int _bnx2fc_create(struct net_device *netdev, } ctlr = bnx2fc_to_ctlr(interface); + cdev = fcoe_ctlr_to_ctlr_dev(ctlr); interface->vlan_id = vlan_id; interface->timer_work_queue = @@ -2143,7 +2144,7 @@ static int _bnx2fc_create(struct net_device *netdev, goto ifput_err; } - lport = bnx2fc_if_create(interface, &interface->hba->pcidev->dev, 0); + lport = bnx2fc_if_create(interface, &cdev->dev, 0); if (!lport) { printk(KERN_ERR PFX "Failed to create interface (%s)\n", netdev->name); @@ -2159,8 +2160,6 @@ static int _bnx2fc_create(struct net_device *netdev, /* Make this master N_port */ ctlr->lp = lport; - cdev = fcoe_ctlr_to_ctlr_dev(ctlr); - if (link_state == BNX2FC_CREATE_LINK_UP) cdev->enabled = FCOE_CTLR_ENABLED; else -- cgit v1.1 From f9c4358edb285cead00a0d6cf0644c84ee773026 Mon Sep 17 00:00:00 2001 From: Robert Love Date: Mon, 25 Mar 2013 11:00:27 -0700 Subject: fcoe: Fix deadlock between create and destroy paths We can deadlock (s_active and fcoe_config_mutex) if a port is being destroyed at the same time one is being created. [ 4200.503113] ====================================================== [ 4200.503114] [ INFO: possible circular locking dependency detected ] [ 4200.503116] 3.8.0-rc5+ #8 Not tainted [ 4200.503117] ------------------------------------------------------- [ 4200.503118] kworker/3:2/2492 is trying to acquire lock: [ 4200.503119] (s_active#292){++++.+}, at: [] sysfs_addrm_finish+0x3b/0x70 [ 4200.503127] but task is already holding lock: [ 4200.503128] (fcoe_config_mutex){+.+.+.}, at: [] fcoe_destroy_work+0xe8/0x120 [fcoe] [ 4200.503133] which lock already depends on the new lock. [ 4200.503135] the existing dependency chain (in reverse order) is: [ 4200.503136] -> #1 (fcoe_config_mutex){+.+.+.}: [ 4200.503139] [] lock_acquire+0xa1/0x140 [ 4200.503143] [] mutex_lock_nested+0x6e/0x360 [ 4200.503146] [] fcoe_enable+0x1d/0xb0 [fcoe] [ 4200.503148] [] fcoe_ctlr_enabled+0x2d/0x50 [fcoe] [ 4200.503151] [] store_ctlr_enabled+0x38/0x90 [libfcoe] [ 4200.503154] [] dev_attr_store+0x18/0x30 [ 4200.503157] [] sysfs_write_file+0xe0/0x150 [ 4200.503160] [] vfs_write+0xac/0x180 [ 4200.503162] [] sys_write+0x52/0xa0 [ 4200.503164] [] system_call_fastpath+0x16/0x1b [ 4200.503167] -> #0 (s_active#292){++++.+}: [ 4200.503170] [] __lock_acquire+0x135f/0x1c90 [ 4200.503172] [] lock_acquire+0xa1/0x140 [ 4200.503174] [] sysfs_deactivate+0x116/0x160 [ 4200.503176] [] sysfs_addrm_finish+0x3b/0x70 [ 4200.503178] [] sysfs_hash_and_remove+0x5b/0xb0 [ 4200.503180] [] sysfs_remove_group+0x61/0x100 [ 4200.503183] [] device_remove_groups+0x3b/0x60 [ 4200.503185] [] device_remove_attrs+0x44/0x80 [ 4200.503187] [] device_del+0x127/0x1c0 [ 4200.503189] [] device_unregister+0x22/0x60 [ 4200.503191] [] fcoe_ctlr_device_delete+0xe0/0xf0 [libfcoe] [ 4200.503194] [] fcoe_interface_cleanup+0x6c/0xa0 [fcoe] [ 4200.503196] [] fcoe_destroy_work+0x105/0x120 [fcoe] [ 4200.503198] [] process_one_work+0x1a1/0x580 [ 4200.503203] [] worker_thread+0x15e/0x440 [ 4200.503205] [] kthread+0xea/0xf0 [ 4200.503207] [] ret_from_fork+0x7c/0xb0 [ 4200.503209] other info that might help us debug this: [ 4200.503211] Possible unsafe locking scenario: [ 4200.503212] CPU0 CPU1 [ 4200.503213] ---- ---- [ 4200.503214] lock(fcoe_config_mutex); [ 4200.503215] lock(s_active#292); [ 4200.503218] lock(fcoe_config_mutex); [ 4200.503219] lock(s_active#292); [ 4200.503221] *** DEADLOCK *** [ 4200.503223] 3 locks held by kworker/3:2/2492: [ 4200.503224] #0: (fcoe){.+.+.+}, at: [] process_one_work+0x13b/0x580 [ 4200.503228] #1: ((&port->destroy_work)){+.+.+.}, at: [] process_one_work+0x13b/0x580 [ 4200.503232] #2: (fcoe_config_mutex){+.+.+.}, at: [] fcoe_destroy_work+0xe8/0x120 [fcoe] [ 4200.503236] stack backtrace: [ 4200.503238] Pid: 2492, comm: kworker/3:2 Not tainted 3.8.0-rc5+ #8 [ 4200.503240] Call Trace: [ 4200.503243] [] print_circular_bug+0x1fb/0x20c [ 4200.503246] [] __lock_acquire+0x135f/0x1c90 [ 4200.503248] [] ? debug_check_no_locks_freed+0x9a/0x180 [ 4200.503250] [] lock_acquire+0xa1/0x140 [ 4200.503253] [] ? sysfs_addrm_finish+0x3b/0x70 [ 4200.503255] [] sysfs_deactivate+0x116/0x160 [ 4200.503258] [] ? sysfs_addrm_finish+0x3b/0x70 [ 4200.503260] [] sysfs_addrm_finish+0x3b/0x70 [ 4200.503262] [] sysfs_hash_and_remove+0x5b/0xb0 [ 4200.503265] [] sysfs_remove_group+0x61/0x100 [ 4200.503273] [] device_remove_groups+0x3b/0x60 [ 4200.503275] [] device_remove_attrs+0x44/0x80 [ 4200.503277] [] device_del+0x127/0x1c0 [ 4200.503279] [] device_unregister+0x22/0x60 [ 4200.503282] [] fcoe_ctlr_device_delete+0xe0/0xf0 [libfcoe] [ 4200.503285] [] fcoe_interface_cleanup+0x6c/0xa0 [fcoe] [ 4200.503287] [] fcoe_destroy_work+0x105/0x120 [fcoe] [ 4200.503290] [] process_one_work+0x1a1/0x580 [ 4200.503292] [] ? process_one_work+0x13b/0x580 [ 4200.503295] [] ? fcoe_if_destroy+0x230/0x230 [fcoe] [ 4200.503297] [] worker_thread+0x15e/0x440 [ 4200.503299] [] ? busy_worker_rebind_fn+0x100/0x100 [ 4200.503301] [] kthread+0xea/0xf0 [ 4200.503304] [] ? kthread_create_on_node+0x160/0x160 [ 4200.503306] [] ret_from_fork+0x7c/0xb0 [ 4200.503308] [] ? kthread_create_on_node+0x160/0x160 Signed-off-by: Robert Love Tested-by: Jack Morgan --- drivers/scsi/fcoe/fcoe.c | 15 +++++++++++---- 1 file changed, 11 insertions(+), 4 deletions(-) (limited to 'drivers/scsi') diff --git a/drivers/scsi/fcoe/fcoe.c b/drivers/scsi/fcoe/fcoe.c index b5d92fc..9bfdc9a 100644 --- a/drivers/scsi/fcoe/fcoe.c +++ b/drivers/scsi/fcoe/fcoe.c @@ -490,7 +490,6 @@ static void fcoe_interface_cleanup(struct fcoe_interface *fcoe) { struct net_device *netdev = fcoe->netdev; struct fcoe_ctlr *fip = fcoe_to_ctlr(fcoe); - struct fcoe_ctlr_device *ctlr_dev = fcoe_ctlr_to_ctlr_dev(fip); rtnl_lock(); if (!fcoe->removed) @@ -501,7 +500,6 @@ static void fcoe_interface_cleanup(struct fcoe_interface *fcoe) /* tear-down the FCoE controller */ fcoe_ctlr_destroy(fip); scsi_host_put(fip->lp->host); - fcoe_ctlr_device_delete(ctlr_dev); dev_put(netdev); module_put(THIS_MODULE); } @@ -2194,6 +2192,8 @@ out_nodev: */ static void fcoe_destroy_work(struct work_struct *work) { + struct fcoe_ctlr_device *cdev; + struct fcoe_ctlr *ctlr; struct fcoe_port *port; struct fcoe_interface *fcoe; struct Scsi_Host *shost; @@ -2224,10 +2224,15 @@ static void fcoe_destroy_work(struct work_struct *work) mutex_lock(&fcoe_config_mutex); fcoe = port->priv; + ctlr = fcoe_to_ctlr(fcoe); + cdev = fcoe_ctlr_to_ctlr_dev(ctlr); + fcoe_if_destroy(port->lport); fcoe_interface_cleanup(fcoe); mutex_unlock(&fcoe_config_mutex); + + fcoe_ctlr_device_delete(cdev); } /** @@ -2335,7 +2340,9 @@ static int _fcoe_create(struct net_device *netdev, enum fip_state fip_mode, rc = -EIO; rtnl_unlock(); fcoe_interface_cleanup(fcoe); - goto out_nortnl; + mutex_unlock(&fcoe_config_mutex); + fcoe_ctlr_device_delete(ctlr_dev); + goto out; } /* Make this the "master" N_Port */ @@ -2375,8 +2382,8 @@ static int _fcoe_create(struct net_device *netdev, enum fip_state fip_mode, out_nodev: rtnl_unlock(); -out_nortnl: mutex_unlock(&fcoe_config_mutex); +out: return rc; } -- cgit v1.1 From 8a9a71381208b2364a2d12b0d257ae333917a1bc Mon Sep 17 00:00:00 2001 From: Robert Love Date: Mon, 25 Mar 2013 11:00:27 -0700 Subject: libfc, fcoe, bnx2fc: Always use fcoe_disc_init for discovery layer initialization Currently libfcoe is doing some libfc discovery layer initialization outside of libfc. This patch moves this code into libfc and sets up a split in discovery (one time) initialization code and (re-configurable) settings that will come in the next patch. Signed-off-by: Robert Love Tested-by: Jack Morgan Reviewed-by: Bhanu Prakash Gollapudi --- drivers/scsi/bnx2fc/bnx2fc_fcoe.c | 2 +- drivers/scsi/fcoe/fcoe_ctlr.c | 11 ++++++----- drivers/scsi/libfc/fc_disc.c | 5 +++-- 3 files changed, 10 insertions(+), 8 deletions(-) (limited to 'drivers/scsi') diff --git a/drivers/scsi/bnx2fc/bnx2fc_fcoe.c b/drivers/scsi/bnx2fc/bnx2fc_fcoe.c index cc4791c..b867b1b 100644 --- a/drivers/scsi/bnx2fc/bnx2fc_fcoe.c +++ b/drivers/scsi/bnx2fc/bnx2fc_fcoe.c @@ -939,7 +939,7 @@ static int bnx2fc_libfc_config(struct fc_lport *lport) fc_elsct_init(lport); fc_exch_init(lport); fc_rport_init(lport); - fc_disc_init(lport); + fc_disc_init(lport, lport); return 0; } diff --git a/drivers/scsi/fcoe/fcoe_ctlr.c b/drivers/scsi/fcoe/fcoe_ctlr.c index 08c3bc3..ba2f977 100644 --- a/drivers/scsi/fcoe/fcoe_ctlr.c +++ b/drivers/scsi/fcoe/fcoe_ctlr.c @@ -2826,6 +2826,8 @@ unlock: int fcoe_libfc_config(struct fc_lport *lport, struct fcoe_ctlr *fip, const struct libfc_function_template *tt, int init_fcp) { + void *priv = lport; + /* Set the function pointers set by the LLDD */ memcpy(&lport->tt, tt, sizeof(*tt)); if (init_fcp && fc_fcp_init(lport)) @@ -2842,12 +2844,11 @@ int fcoe_libfc_config(struct fc_lport *lport, struct fcoe_ctlr *fip, lport->tt.disc_start = fcoe_ctlr_disc_start; lport->tt.disc_stop = fcoe_ctlr_disc_stop; lport->tt.disc_stop_final = fcoe_ctlr_disc_stop_final; - mutex_init(&lport->disc.disc_mutex); - INIT_LIST_HEAD(&lport->disc.rports); - lport->disc.priv = fip; - } else { - fc_disc_init(lport); + priv = fip; } + + fc_disc_init(lport, priv); + return 0; } EXPORT_SYMBOL_GPL(fcoe_libfc_config); diff --git a/drivers/scsi/libfc/fc_disc.c b/drivers/scsi/libfc/fc_disc.c index 8e561e6..141c54b 100644 --- a/drivers/scsi/libfc/fc_disc.c +++ b/drivers/scsi/libfc/fc_disc.c @@ -714,8 +714,9 @@ static void fc_disc_stop_final(struct fc_lport *lport) /** * fc_disc_init() - Initialize the discovery layer for a local port * @lport: The local port that needs the discovery layer to be initialized + * @priv: Private data structre for users of the discovery layer */ -int fc_disc_init(struct fc_lport *lport) +int fc_disc_init(struct fc_lport *lport, void *priv) { struct fc_disc *disc; @@ -736,7 +737,7 @@ int fc_disc_init(struct fc_lport *lport) mutex_init(&disc->disc_mutex); INIT_LIST_HEAD(&disc->rports); - disc->priv = lport; + disc->priv = priv; return 0; } -- cgit v1.1 From 0807619d3c64d935c257a377ac86982c777f969c Mon Sep 17 00:00:00 2001 From: Robert Love Date: Mon, 25 Mar 2013 11:00:28 -0700 Subject: libfc, fcoe, bnx2fc: Split fc_disc_init into fc_disc_{init, config} Split discovery initialization in code that is setup once (fcoe_disc_init) and code that can be re-configured (fcoe_disc_config). Signed-off-by: Robert Love Tested-by: Jack Morgan Reviewed-by: Bhanu Prakash Gollapudi --- drivers/scsi/bnx2fc/bnx2fc_fcoe.c | 3 ++- drivers/scsi/fcoe/fcoe_ctlr.c | 3 ++- drivers/scsi/libfc/fc_disc.c | 25 +++++++++++++++++-------- 3 files changed, 21 insertions(+), 10 deletions(-) (limited to 'drivers/scsi') diff --git a/drivers/scsi/bnx2fc/bnx2fc_fcoe.c b/drivers/scsi/bnx2fc/bnx2fc_fcoe.c index b867b1b..90bc7bd 100644 --- a/drivers/scsi/bnx2fc/bnx2fc_fcoe.c +++ b/drivers/scsi/bnx2fc/bnx2fc_fcoe.c @@ -939,7 +939,8 @@ static int bnx2fc_libfc_config(struct fc_lport *lport) fc_elsct_init(lport); fc_exch_init(lport); fc_rport_init(lport); - fc_disc_init(lport, lport); + fc_disc_init(lport); + fc_disc_config(lport, lport); return 0; } diff --git a/drivers/scsi/fcoe/fcoe_ctlr.c b/drivers/scsi/fcoe/fcoe_ctlr.c index ba2f977..34ee56c 100644 --- a/drivers/scsi/fcoe/fcoe_ctlr.c +++ b/drivers/scsi/fcoe/fcoe_ctlr.c @@ -2847,7 +2847,8 @@ int fcoe_libfc_config(struct fc_lport *lport, struct fcoe_ctlr *fip, priv = fip; } - fc_disc_init(lport, priv); + fc_disc_init(lport); + fc_disc_config(lport, priv); return 0; } diff --git a/drivers/scsi/libfc/fc_disc.c b/drivers/scsi/libfc/fc_disc.c index 141c54b..880a906 100644 --- a/drivers/scsi/libfc/fc_disc.c +++ b/drivers/scsi/libfc/fc_disc.c @@ -712,13 +712,13 @@ static void fc_disc_stop_final(struct fc_lport *lport) } /** - * fc_disc_init() - Initialize the discovery layer for a local port - * @lport: The local port that needs the discovery layer to be initialized + * fc_disc_config() - Configure the discovery layer for a local port + * @lport: The local port that needs the discovery layer to be configured * @priv: Private data structre for users of the discovery layer */ -int fc_disc_init(struct fc_lport *lport, void *priv) +void fc_disc_config(struct fc_lport *lport, void *priv) { - struct fc_disc *disc; + struct fc_disc *disc = &lport->disc; if (!lport->tt.disc_start) lport->tt.disc_start = fc_disc_start; @@ -733,12 +733,21 @@ int fc_disc_init(struct fc_lport *lport, void *priv) lport->tt.disc_recv_req = fc_disc_recv_req; disc = &lport->disc; - INIT_DELAYED_WORK(&disc->disc_work, fc_disc_timeout); - mutex_init(&disc->disc_mutex); - INIT_LIST_HEAD(&disc->rports); disc->priv = priv; +} +EXPORT_SYMBOL(fc_disc_config); - return 0; +/** + * fc_disc_init() - Initialize the discovery layer for a local port + * @lport: The local port that needs the discovery layer to be initialized + */ +void fc_disc_init(struct fc_lport *lport) +{ + struct fc_disc *disc = &lport->disc; + + INIT_DELAYED_WORK(&disc->disc_work, fc_disc_timeout); + mutex_init(&disc->disc_mutex); + INIT_LIST_HEAD(&disc->rports); } EXPORT_SYMBOL(fc_disc_init); -- cgit v1.1 From 0db0e377ab5be5d507a2fca3d78215cd2e83b974 Mon Sep 17 00:00:00 2001 From: Robert Love Date: Mon, 25 Mar 2013 11:00:28 -0700 Subject: libfcoe: Fix fcoe_sysfs VN2VN mode The libfc discovery layer is being initialized in the 'create' paths for both legacy libfcoe module parameters and fcoe_sysfs control interfaces. The problem is that for VN2VN mode the discovery layer is initialized as if it were in 'fabric' mode and it is not re-configured when the mode is changed to 'vn2vn'. This patch splits out code that needs to be initialized once and code that can, and should be, re-configured when the mode changes. Additionally this patch makes that change so that the discovery layer can be reconfigured to the libfcoe implementation when in 'vn2vn' mode. Signed-off-by: Robert Love Tested-by: Jack Morgan Reviewed-by: Bhanu Prakash Gollapudi --- drivers/scsi/fcoe/fcoe_ctlr.c | 60 ++++++++++++++++++++++++++++++++----------- 1 file changed, 45 insertions(+), 15 deletions(-) (limited to 'drivers/scsi') diff --git a/drivers/scsi/fcoe/fcoe_ctlr.c b/drivers/scsi/fcoe/fcoe_ctlr.c index 34ee56c..a762472 100644 --- a/drivers/scsi/fcoe/fcoe_ctlr.c +++ b/drivers/scsi/fcoe/fcoe_ctlr.c @@ -2815,6 +2815,47 @@ unlock: } /** + * fcoe_ctlr_mode_set() - Set or reset the ctlr's mode + * @lport: The local port to be (re)configured + * @fip: The FCoE controller whose mode is changing + * @fip_mode: The new fip mode + * + * Note that the we shouldn't be changing the libfc discovery settings + * (fc_disc_config) while an lport is going through the libfc state + * machine. The mode can only be changed when a fcoe_ctlr device is + * disabled, so that should ensure that this routine is only called + * when nothing is happening. + */ +void fcoe_ctlr_mode_set(struct fc_lport *lport, struct fcoe_ctlr *fip, + enum fip_state fip_mode) +{ + void *priv; + + WARN_ON(lport->state != LPORT_ST_RESET && + lport->state != LPORT_ST_DISABLED); + + if (fip_mode == FIP_MODE_VN2VN) { + lport->rport_priv_size = sizeof(struct fcoe_rport); + lport->point_to_multipoint = 1; + lport->tt.disc_recv_req = fcoe_ctlr_disc_recv; + lport->tt.disc_start = fcoe_ctlr_disc_start; + lport->tt.disc_stop = fcoe_ctlr_disc_stop; + lport->tt.disc_stop_final = fcoe_ctlr_disc_stop_final; + priv = fip; + } else { + lport->rport_priv_size = 0; + lport->point_to_multipoint = 0; + lport->tt.disc_recv_req = NULL; + lport->tt.disc_start = NULL; + lport->tt.disc_stop = NULL; + lport->tt.disc_stop_final = NULL; + priv = lport; + } + + fc_disc_config(lport, priv); +} + +/** * fcoe_libfc_config() - Sets up libfc related properties for local port * @lport: The local port to configure libfc for * @fip: The FCoE controller in use by the local port @@ -2826,8 +2867,6 @@ unlock: int fcoe_libfc_config(struct fc_lport *lport, struct fcoe_ctlr *fip, const struct libfc_function_template *tt, int init_fcp) { - void *priv = lport; - /* Set the function pointers set by the LLDD */ memcpy(&lport->tt, tt, sizeof(*tt)); if (init_fcp && fc_fcp_init(lport)) @@ -2835,21 +2874,9 @@ int fcoe_libfc_config(struct fc_lport *lport, struct fcoe_ctlr *fip, fc_exch_init(lport); fc_elsct_init(lport); fc_lport_init(lport); - if (fip->mode == FIP_MODE_VN2VN) - lport->rport_priv_size = sizeof(struct fcoe_rport); fc_rport_init(lport); - if (fip->mode == FIP_MODE_VN2VN) { - lport->point_to_multipoint = 1; - lport->tt.disc_recv_req = fcoe_ctlr_disc_recv; - lport->tt.disc_start = fcoe_ctlr_disc_start; - lport->tt.disc_stop = fcoe_ctlr_disc_stop; - lport->tt.disc_stop_final = fcoe_ctlr_disc_stop_final; - priv = fip; - } - fc_disc_init(lport); - fc_disc_config(lport, priv); - + fcoe_ctlr_mode_set(lport, fip, fip->mode); return 0; } EXPORT_SYMBOL_GPL(fcoe_libfc_config); @@ -2877,6 +2904,7 @@ EXPORT_SYMBOL(fcoe_fcf_get_selected); void fcoe_ctlr_set_fip_mode(struct fcoe_ctlr_device *ctlr_dev) { struct fcoe_ctlr *ctlr = fcoe_ctlr_device_priv(ctlr_dev); + struct fc_lport *lport = ctlr->lp; mutex_lock(&ctlr->ctlr_mutex); switch (ctlr_dev->mode) { @@ -2890,5 +2918,7 @@ void fcoe_ctlr_set_fip_mode(struct fcoe_ctlr_device *ctlr_dev) } mutex_unlock(&ctlr->ctlr_mutex); + + fcoe_ctlr_mode_set(lport, ctlr, ctlr->mode); } EXPORT_SYMBOL(fcoe_ctlr_set_fip_mode); -- cgit v1.1 From f19799f49d1a03f39d5e53fa1bf05db4820c86c2 Mon Sep 17 00:00:00 2001 From: "wenxiong@linux.vnet.ibm.com" Date: Wed, 27 Feb 2013 12:37:45 -0600 Subject: [SCSI] ipr: ipr_test_msi() fails when running with msi-x enabled adapter Loading ipr modules failed(-22) with msi-x enabled adapter. In ipr_test_msi(), We need to pass the first vector of msix vectors instead of using pdev->irq to request_irq() when adapter enables msix feature. Signed-off-by: Wen Xiong Acked-by: Brian King Signed-off-by: James Bottomley --- drivers/scsi/ipr.c | 10 ++++++++-- 1 file changed, 8 insertions(+), 2 deletions(-) (limited to 'drivers/scsi') diff --git a/drivers/scsi/ipr.c b/drivers/scsi/ipr.c index f328089..fadf152 100644 --- a/drivers/scsi/ipr.c +++ b/drivers/scsi/ipr.c @@ -9349,7 +9349,10 @@ static int ipr_test_msi(struct ipr_ioa_cfg *ioa_cfg, struct pci_dev *pdev) int_reg = readl(ioa_cfg->regs.sense_interrupt_mask_reg); spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags); - rc = request_irq(pdev->irq, ipr_test_intr, 0, IPR_NAME, ioa_cfg); + if (ioa_cfg->intr_flag == IPR_USE_MSIX) + rc = request_irq(ioa_cfg->vectors_info[0].vec, ipr_test_intr, 0, IPR_NAME, ioa_cfg); + else + rc = request_irq(pdev->irq, ipr_test_intr, 0, IPR_NAME, ioa_cfg); if (rc) { dev_err(&pdev->dev, "Can not assign irq %d\n", pdev->irq); return rc; @@ -9371,7 +9374,10 @@ static int ipr_test_msi(struct ipr_ioa_cfg *ioa_cfg, struct pci_dev *pdev) spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags); - free_irq(pdev->irq, ioa_cfg); + if (ioa_cfg->intr_flag == IPR_USE_MSIX) + free_irq(ioa_cfg->vectors_info[0].vec, ioa_cfg); + else + free_irq(pdev->irq, ioa_cfg); LEAVE; -- cgit v1.1 From 95c9f4d4da6c4e445a9dd58c8382356520ea91a0 Mon Sep 17 00:00:00 2001 From: John Gong Date: Wed, 6 Mar 2013 10:43:03 +0800 Subject: [SCSI] libsas: use right function to alloc smp response In fact the disc_resp buffer will be overwrite by smp response, so we never found this typo, correct it by using the right one. Signed-off-by: John Gong Signed-off-by: Jack Wang Signed-off-by: James Bottomley --- drivers/scsi/libsas/sas_expander.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'drivers/scsi') diff --git a/drivers/scsi/libsas/sas_expander.c b/drivers/scsi/libsas/sas_expander.c index aec2e0d..588affd 100644 --- a/drivers/scsi/libsas/sas_expander.c +++ b/drivers/scsi/libsas/sas_expander.c @@ -388,7 +388,7 @@ int sas_ex_phy_discover(struct domain_device *dev, int single) if (!disc_req) return -ENOMEM; - disc_resp = alloc_smp_req(DISCOVER_RESP_SIZE); + disc_resp = alloc_smp_resp(DISCOVER_RESP_SIZE); if (!disc_resp) { kfree(disc_req); return -ENOMEM; -- cgit v1.1 From 2b5bebccd282f2527d17ac90cf3ad0d486dd89d8 Mon Sep 17 00:00:00 2001 From: Joe Lawrence Date: Tue, 5 Mar 2013 10:57:56 -0500 Subject: [SCSI] st: Take additional queue ref in st_probe MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit This patch fixes a reference count bug in the SCSI tape driver which can be reproduced with the following: * Boot with slub_debug=FZPU, tape drive attached * echo 1 > /sys/devices/... tape device pci path .../remove * Wait for device removal * echo 1 > /sys/kernel/slab/blkdev_queue/validate * Slub debug complains about corrupted poison pattern In commit 523e1d39 (block: make gendisk hold a reference to its queue) add_disk() and disk_release() were modified to get/put an additional reference on a disk queue to fix a reference counting discrepency between bdev release and SCSI device removal. The ST driver never calls add_disk(), so this commit introduced an extra kref put when the ST driver frees its struct gendisk. Attempts were made to fix this bug at the block level [1] but later abandoned due to floppy driver issues [2]. [1] https://lkml.org/lkml/2012/8/27/354 [2] https://lkml.org/lkml/2012/9/22/113 Signed-off-by: Joe Lawrence Tested-by: Ewan D. Milne Acked-by: Kai Mäkisara Signed-off-by: James Bottomley --- drivers/scsi/st.c | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) (limited to 'drivers/scsi') diff --git a/drivers/scsi/st.c b/drivers/scsi/st.c index 8697447..2a32036 100644 --- a/drivers/scsi/st.c +++ b/drivers/scsi/st.c @@ -4112,6 +4112,10 @@ static int st_probe(struct device *dev) tpnt->disk = disk; disk->private_data = &tpnt->driver; disk->queue = SDp->request_queue; + /* SCSI tape doesn't register this gendisk via add_disk(). Manually + * take queue reference that release_disk() expects. */ + if (!blk_get_queue(disk->queue)) + goto out_put_disk; tpnt->driver = &st_template; tpnt->device = SDp; @@ -4185,7 +4189,7 @@ static int st_probe(struct device *dev) idr_preload_end(); if (error < 0) { pr_warn("st: idr allocation failed: %d\n", error); - goto out_put_disk; + goto out_put_queue; } tpnt->index = error; sprintf(disk->disk_name, "st%d", tpnt->index); @@ -4211,6 +4215,8 @@ out_remove_devs: spin_lock(&st_index_lock); idr_remove(&st_index_idr, tpnt->index); spin_unlock(&st_index_lock); +out_put_queue: + blk_put_queue(disk->queue); out_put_disk: put_disk(disk); kfree(tpnt); -- cgit v1.1 From c4ee22a3708d54d8fb5ee8a23ca08e74abcaedfd Mon Sep 17 00:00:00 2001 From: Kleber Sacilotto de Souza Date: Thu, 14 Mar 2013 13:52:23 -0500 Subject: [SCSI] ipr: fix addition of abort command to HRRQ free queue The abort command issued by ipr_cancel_op() is being added to the wrong HRRQ free queue after the command returns. Fix it by using the HRRQ pointer in the ipr command struct itself. Signed-off-by: Kleber Sacilotto de Souza Signed-off-by: Wen Xiong Acked-by: Brian King Signed-off-by: James Bottomley --- drivers/scsi/ipr.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'drivers/scsi') diff --git a/drivers/scsi/ipr.c b/drivers/scsi/ipr.c index fadf152..21e0a0a 100644 --- a/drivers/scsi/ipr.c +++ b/drivers/scsi/ipr.c @@ -5148,7 +5148,7 @@ static int ipr_cancel_op(struct scsi_cmnd *scsi_cmd) ipr_trace; } - list_add_tail(&ipr_cmd->queue, &hrrq->hrrq_free_q); + list_add_tail(&ipr_cmd->queue, &ipr_cmd->hrrq->hrrq_free_q); if (!ipr_is_naca_model(res)) res->needs_sync_complete = 1; -- cgit v1.1 From 9077a944bc3c8bea45a91dc2caa65e96ac4c5f87 Mon Sep 17 00:00:00 2001 From: "wenxiong@linux.vnet.ibm.com" Date: Thu, 14 Mar 2013 13:52:24 -0500 Subject: [SCSI] ipr: dlpar failed when adding an adapter back Reinitialize resource queue prior to freeing resource entries to ensure they are not referenced. This fixes an issue with target_destoy accessing memory after it was freed. Signed-off-by: Wen Xiong Acked-by: Brian King Signed-off-by: James Bottomley --- drivers/scsi/ipr.c | 1 + 1 file changed, 1 insertion(+) (limited to 'drivers/scsi') diff --git a/drivers/scsi/ipr.c b/drivers/scsi/ipr.c index 21e0a0a..2197b57 100644 --- a/drivers/scsi/ipr.c +++ b/drivers/scsi/ipr.c @@ -9728,6 +9728,7 @@ static void __ipr_remove(struct pci_dev *pdev) spin_unlock_irqrestore(ioa_cfg->host->host_lock, host_lock_flags); wait_event(ioa_cfg->reset_wait_q, !ioa_cfg->in_reset_reload); flush_work(&ioa_cfg->work_q); + INIT_LIST_HEAD(&ioa_cfg->used_res_q); spin_lock_irqsave(ioa_cfg->host->host_lock, host_lock_flags); spin_lock(&ipr_driver_lock); -- cgit v1.1 From e9f4f418076f7d08a73667472b5f74a02965221d Mon Sep 17 00:00:00 2001 From: Joe Carnuccio Date: Mon, 25 Mar 2013 02:21:36 -0400 Subject: [SCSI] Revert "qla2xxx: Add setting of driver version string for vendor application." The original patch was not covering all the adapters and firmwares. This commit reverts 3a11711ad00caebee07e262d188cea66f3473c38. Signed-off-by: Joe Carnuccio Signed-off-by: Saurav Kashyap Signed-off-by: James Bottomley --- drivers/scsi/qla2xxx/qla_dbg.c | 1 + drivers/scsi/qla2xxx/qla_def.h | 1 - drivers/scsi/qla2xxx/qla_gbl.h | 3 --- drivers/scsi/qla2xxx/qla_init.c | 2 -- drivers/scsi/qla2xxx/qla_mbx.c | 58 ----------------------------------------- 5 files changed, 1 insertion(+), 64 deletions(-) (limited to 'drivers/scsi') diff --git a/drivers/scsi/qla2xxx/qla_dbg.c b/drivers/scsi/qla2xxx/qla_dbg.c index 1626de5..2bf0214 100644 --- a/drivers/scsi/qla2xxx/qla_dbg.c +++ b/drivers/scsi/qla2xxx/qla_dbg.c @@ -15,6 +15,7 @@ * | Mailbox commands | 0x115b | 0x111a-0x111b | * | | | 0x112c-0x112e | * | | | 0x113a | + * | | | 0x1155-0x1158 | * | Device Discovery | 0x2087 | 0x2020-0x2022, | * | | | 0x2016 | * | Queue Command and IO tracing | 0x3031 | 0x3006-0x300b | diff --git a/drivers/scsi/qla2xxx/qla_def.h b/drivers/scsi/qla2xxx/qla_def.h index c650991..65c5ff7 100644 --- a/drivers/scsi/qla2xxx/qla_def.h +++ b/drivers/scsi/qla2xxx/qla_def.h @@ -863,7 +863,6 @@ typedef struct { #define MBX_1 BIT_1 #define MBX_0 BIT_0 -#define RNID_TYPE_SET_VERSION 0x9 #define RNID_TYPE_ASIC_TEMP 0xC /* diff --git a/drivers/scsi/qla2xxx/qla_gbl.h b/drivers/scsi/qla2xxx/qla_gbl.h index eb3ca21..b310fa9 100644 --- a/drivers/scsi/qla2xxx/qla_gbl.h +++ b/drivers/scsi/qla2xxx/qla_gbl.h @@ -358,9 +358,6 @@ extern int qla2x00_disable_fce_trace(scsi_qla_host_t *, uint64_t *, uint64_t *); extern int -qla2x00_set_driver_version(scsi_qla_host_t *, char *); - -extern int qla2x00_read_sfp(scsi_qla_host_t *, dma_addr_t, uint8_t *, uint16_t, uint16_t, uint16_t, uint16_t); diff --git a/drivers/scsi/qla2xxx/qla_init.c b/drivers/scsi/qla2xxx/qla_init.c index edf4d14..09eae54 100644 --- a/drivers/scsi/qla2xxx/qla_init.c +++ b/drivers/scsi/qla2xxx/qla_init.c @@ -619,8 +619,6 @@ qla2x00_initialize_adapter(scsi_qla_host_t *vha) if (IS_QLA24XX_TYPE(ha) || IS_QLA25XX(ha)) qla24xx_read_fcp_prio_cfg(vha); - qla2x00_set_driver_version(vha, QLA2XXX_VERSION); - return (rval); } diff --git a/drivers/scsi/qla2xxx/qla_mbx.c b/drivers/scsi/qla2xxx/qla_mbx.c index 186dd59..43345af 100644 --- a/drivers/scsi/qla2xxx/qla_mbx.c +++ b/drivers/scsi/qla2xxx/qla_mbx.c @@ -3866,64 +3866,6 @@ qla81xx_restart_mpi_firmware(scsi_qla_host_t *vha) return rval; } -int -qla2x00_set_driver_version(scsi_qla_host_t *vha, char *version) -{ - int rval; - mbx_cmd_t mc; - mbx_cmd_t *mcp = &mc; - int len; - uint16_t dwlen; - uint8_t *str; - dma_addr_t str_dma; - struct qla_hw_data *ha = vha->hw; - - if (!IS_FWI2_CAPABLE(ha) || IS_QLA82XX(ha)) - return QLA_FUNCTION_FAILED; - - ql_dbg(ql_dbg_mbx + ql_dbg_verbose, vha, 0x1155, - "Entered %s.\n", __func__); - - str = dma_pool_alloc(ha->s_dma_pool, GFP_KERNEL, &str_dma); - if (!str) { - ql_log(ql_log_warn, vha, 0x1156, - "Failed to allocate driver version param.\n"); - return QLA_MEMORY_ALLOC_FAILED; - } - - memcpy(str, "\x7\x3\x11\x0", 4); - dwlen = str[0]; - len = dwlen * sizeof(uint32_t) - 4; - memset(str + 4, 0, len); - if (len > strlen(version)) - len = strlen(version); - memcpy(str + 4, version, len); - - mcp->mb[0] = MBC_SET_RNID_PARAMS; - mcp->mb[1] = RNID_TYPE_SET_VERSION << 8 | dwlen; - mcp->mb[2] = MSW(LSD(str_dma)); - mcp->mb[3] = LSW(LSD(str_dma)); - mcp->mb[6] = MSW(MSD(str_dma)); - mcp->mb[7] = LSW(MSD(str_dma)); - mcp->out_mb = MBX_7|MBX_6|MBX_3|MBX_2|MBX_1|MBX_0; - mcp->in_mb = MBX_0; - mcp->tov = MBX_TOV_SECONDS; - mcp->flags = 0; - rval = qla2x00_mailbox_command(vha, mcp); - - if (rval != QLA_SUCCESS) { - ql_dbg(ql_dbg_mbx, vha, 0x1157, - "Failed=%x mb[0]=%x.\n", rval, mcp->mb[0]); - } else { - ql_dbg(ql_dbg_mbx + ql_dbg_verbose, vha, 0x1158, - "Done %s.\n", __func__); - } - - dma_pool_free(ha->s_dma_pool, str, str_dma); - - return rval; -} - static int qla2x00_read_asic_temperature(scsi_qla_host_t *vha, uint16_t *temp) { -- cgit v1.1 From 00876ae85b47cdfe76aa08b1fffb27fd67425f53 Mon Sep 17 00:00:00 2001 From: Arun Easi Date: Mon, 25 Mar 2013 02:21:37 -0400 Subject: [SCSI] qla2xxx: Fix crash during firmware dump procedure. System crashes, in initiator mode operation, with qla2xxx_copy_atioqueues() in stack trace when firmware dump is attempted. Check for atio_q_length alone does not indicate if atio_ring is allocated, make explicit check of atio_ring to avoid the crash. Applicable to ISP24xx, ISP25xx, ISP81xx & ISP83xx line of HBAs. Signed-off-by: Arun Easi Signed-off-by: Saurav Kashyap Signed-off-by: James Bottomley --- drivers/scsi/qla2xxx/qla_dbg.c | 2 +- drivers/scsi/qla2xxx/qla_init.c | 2 +- 2 files changed, 2 insertions(+), 2 deletions(-) (limited to 'drivers/scsi') diff --git a/drivers/scsi/qla2xxx/qla_dbg.c b/drivers/scsi/qla2xxx/qla_dbg.c index 2bf0214..fbc305f 100644 --- a/drivers/scsi/qla2xxx/qla_dbg.c +++ b/drivers/scsi/qla2xxx/qla_dbg.c @@ -402,7 +402,7 @@ qla2xxx_copy_atioqueues(struct qla_hw_data *ha, void *ptr, void *ring; } aq, *aqp; - if (!ha->tgt.atio_q_length) + if (!ha->tgt.atio_ring) return ptr; num_queues = 1; diff --git a/drivers/scsi/qla2xxx/qla_init.c b/drivers/scsi/qla2xxx/qla_init.c index 09eae54..b592033 100644 --- a/drivers/scsi/qla2xxx/qla_init.c +++ b/drivers/scsi/qla2xxx/qla_init.c @@ -1397,7 +1397,7 @@ qla2x00_alloc_fw_dump(scsi_qla_host_t *vha) mq_size += ha->max_rsp_queues * (rsp->length * sizeof(response_t)); } - if (ha->tgt.atio_q_length) + if (ha->tgt.atio_ring) mq_size += ha->tgt.atio_q_length * sizeof(request_t); /* Allocate memory for Fibre Channel Event Buffer. */ if (!IS_QLA25XX(ha) && !IS_QLA81XX(ha) && !IS_QLA83XX(ha)) -- cgit v1.1 From 4a9fa41bd404b8a572e4af7d2221e423bb729e52 Mon Sep 17 00:00:00 2001 From: Saurav Kashyap Date: Mon, 25 Mar 2013 02:21:39 -0400 Subject: [SCSI] qla2xxx: Remove debug code that msleeps for random duration. Signed-off-by: Giridhar Malavali Signed-off-by: Saurav Kashyap Signed-off-by: James Bottomley --- drivers/scsi/qla2xxx/qla_attr.c | 5 ----- 1 file changed, 5 deletions(-) (limited to 'drivers/scsi') diff --git a/drivers/scsi/qla2xxx/qla_attr.c b/drivers/scsi/qla2xxx/qla_attr.c index 1d82eef..b3db9dc 100644 --- a/drivers/scsi/qla2xxx/qla_attr.c +++ b/drivers/scsi/qla2xxx/qla_attr.c @@ -1938,11 +1938,6 @@ qla24xx_vport_delete(struct fc_vport *fc_vport) "Timer for the VP[%d] has stopped\n", vha->vp_idx); } - /* No pending activities shall be there on the vha now */ - if (ql2xextended_error_logging & ql_dbg_user) - msleep(random32()%10); /* Just to see if something falls on - * the net we have placed below */ - BUG_ON(atomic_read(&vha->vref_count)); qla2x00_free_fcports(vha); -- cgit v1.1 From 231ff54e4cc4a6f1ef78fb4e1f94957bbb961aae Mon Sep 17 00:00:00 2001 From: Saurav Kashyap Date: Mon, 25 Mar 2013 02:21:40 -0400 Subject: [SCSI] qla2xxx: Update the driver version to 8.04.00.13-k. Signed-off-by: Giridhar Malavali Signed-off-by: Saurav Kashyap Signed-off-by: James Bottomley --- drivers/scsi/qla2xxx/qla_version.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'drivers/scsi') diff --git a/drivers/scsi/qla2xxx/qla_version.h b/drivers/scsi/qla2xxx/qla_version.h index 2b6e478..ec54036 100644 --- a/drivers/scsi/qla2xxx/qla_version.h +++ b/drivers/scsi/qla2xxx/qla_version.h @@ -7,7 +7,7 @@ /* * Driver version */ -#define QLA2XXX_VERSION "8.04.00.08-k" +#define QLA2XXX_VERSION "8.04.00.13-k" #define QLA_DRIVER_MAJOR_VER 8 #define QLA_DRIVER_MINOR_VER 4 -- cgit v1.1 From 9d85b590057523c2bfe3bea2f62ba9e2701a62db Mon Sep 17 00:00:00 2001 From: Brian King Date: Mon, 1 Apr 2013 09:44:26 -0500 Subject: [SCSI] ibmvscsi: Fix slave_configure deadlock No locks should be held when calling scsi_adjust_queue_depth so drop the lock in slave_configure prior to calling it. Signed-off-by: Brian King Acked-by: Robert Jennings Signed-off-by: James Bottomley --- drivers/scsi/ibmvscsi/ibmvscsi.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'drivers/scsi') diff --git a/drivers/scsi/ibmvscsi/ibmvscsi.c b/drivers/scsi/ibmvscsi/ibmvscsi.c index a044f59..d0fa4b6 100644 --- a/drivers/scsi/ibmvscsi/ibmvscsi.c +++ b/drivers/scsi/ibmvscsi/ibmvscsi.c @@ -1899,8 +1899,8 @@ static int ibmvscsi_slave_configure(struct scsi_device *sdev) sdev->allow_restart = 1; blk_queue_rq_timeout(sdev->request_queue, 120 * HZ); } - scsi_adjust_queue_depth(sdev, 0, shost->cmd_per_lun); spin_unlock_irqrestore(shost->host_lock, lock_flags); + scsi_adjust_queue_depth(sdev, 0, shost->cmd_per_lun); return 0; } -- cgit v1.1 From d4a2618fa77b5e58ec15342972bd3505a1c3f551 Mon Sep 17 00:00:00 2001 From: Lukasz Dorau Date: Wed, 3 Apr 2013 10:27:17 +0200 Subject: [SCSI] libsas: fix handling vacant phy in sas_set_ex_phy() If a result of the SMP discover function is PHY VACANT, the content of discover response structure (dr) is not valid. It sometimes happens that dr->attached_sas_addr can contain even SAS address of other phy. In such case an invalid phy is created, what causes NULL pointer dereference during destruction of expander's phys. So if a result of SMP function is PHY VACANT, the content of discover response structure (dr) must not be copied to phy structure. This patch fixes the following bug: BUG: unable to handle kernel NULL pointer dereference at 0000000000000030 IP: [] sysfs_find_dirent+0x12/0x90 Call Trace: [] sysfs_get_dirent+0x35/0x80 [] sysfs_unmerge_group+0x1e/0xb0 [] dpm_sysfs_remove+0x24/0x90 [] device_del+0x44/0x1d0 [] sas_rphy_delete+0x9/0x20 [scsi_transport_sas] [] sas_destruct_devices+0xe6/0x110 [libsas] [] process_one_work+0x16c/0x350 [] worker_thread+0x17a/0x410 [] kthread+0x96/0xa0 [] kernel_thread_helper+0x4/0x10 Signed-off-by: Lukasz Dorau Signed-off-by: Pawel Baldysiak Reviewed-by: Maciej Patelczyk Cc: Signed-off-by: James Bottomley --- drivers/scsi/libsas/sas_expander.c | 12 ++++++++++++ 1 file changed, 12 insertions(+) (limited to 'drivers/scsi') diff --git a/drivers/scsi/libsas/sas_expander.c b/drivers/scsi/libsas/sas_expander.c index 588affd..55cbd01 100644 --- a/drivers/scsi/libsas/sas_expander.c +++ b/drivers/scsi/libsas/sas_expander.c @@ -235,6 +235,17 @@ static void sas_set_ex_phy(struct domain_device *dev, int phy_id, void *rsp) linkrate = phy->linkrate; memcpy(sas_addr, phy->attached_sas_addr, SAS_ADDR_SIZE); + /* Handle vacant phy - rest of dr data is not valid so skip it */ + if (phy->phy_state == PHY_VACANT) { + memset(phy->attached_sas_addr, 0, SAS_ADDR_SIZE); + phy->attached_dev_type = NO_DEVICE; + if (!test_bit(SAS_HA_ATA_EH_ACTIVE, &ha->state)) { + phy->phy_id = phy_id; + goto skip; + } else + goto out; + } + phy->attached_dev_type = to_dev_type(dr); if (test_bit(SAS_HA_ATA_EH_ACTIVE, &ha->state)) goto out; @@ -272,6 +283,7 @@ static void sas_set_ex_phy(struct domain_device *dev, int phy_id, void *rsp) phy->phy->maximum_linkrate = dr->pmax_linkrate; phy->phy->negotiated_linkrate = phy->linkrate; + skip: if (new_phy) if (sas_phy_add(phy->phy)) { sas_phy_free(phy->phy); -- cgit v1.1 From 5a25bf36b7394f11f2ff90c9e203639cd3dc041a Mon Sep 17 00:00:00 2001 From: Wei Yongjun Date: Sun, 2 Dec 2012 08:33:24 -0500 Subject: [SCSI] lpfc: fix potential NULL pointer dereference in lpfc_sli4_rq_put() The dereference to 'put_index' should be moved below the NULL test. Signed-off-by: Wei Yongjun Acked-by: James Smart Signed-off-by: James Bottomley --- drivers/scsi/lpfc/lpfc_sli.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) (limited to 'drivers/scsi') diff --git a/drivers/scsi/lpfc/lpfc_sli.c b/drivers/scsi/lpfc/lpfc_sli.c index 74b67d9..d43faf3 100644 --- a/drivers/scsi/lpfc/lpfc_sli.c +++ b/drivers/scsi/lpfc/lpfc_sli.c @@ -438,11 +438,12 @@ lpfc_sli4_rq_put(struct lpfc_queue *hq, struct lpfc_queue *dq, struct lpfc_rqe *temp_hrqe; struct lpfc_rqe *temp_drqe; struct lpfc_register doorbell; - int put_index = hq->host_index; + int put_index; /* sanity check on queue memory */ if (unlikely(!hq) || unlikely(!dq)) return -ENOMEM; + put_index = hq->host_index; temp_hrqe = hq->qe[hq->host_index].rqe; temp_drqe = dq->qe[dq->host_index].rqe; -- cgit v1.1