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authorChristof Schmitt <christof.schmitt@de.ibm.com>2009-11-24 16:54:14 +0100
committerJames Bottomley <James.Bottomley@suse.de>2009-12-04 12:02:16 -0600
commitee744622c65cd66824e8dd1b9509e515c800de14 (patch)
tree4925603f5170400b07cde7cc18d2519cfcf788e2 /drivers/s390/scsi
parent7c7dc196814b9e1d5cc254dc579a5fa78ae524f7 (diff)
downloadop-kernel-dev-ee744622c65cd66824e8dd1b9509e515c800de14.zip
op-kernel-dev-ee744622c65cd66824e8dd1b9509e515c800de14.tar.gz
[SCSI] zfcp: Improve ELS ADISC handling
Introduce kmem_cache for ELS ADISC data to guarantee the required hardware alignment and free the allocated memory in case the send failes. Reviewed-by: Swen Schillig <swen@vnet.ibm.com> Signed-off-by: Christof Schmitt <christof.schmitt@de.ibm.com> Signed-off-by: James Bottomley <James.Bottomley@suse.de>
Diffstat (limited to 'drivers/s390/scsi')
-rw-r--r--drivers/s390/scsi/zfcp_aux.c8
-rw-r--r--drivers/s390/scsi/zfcp_def.h1
-rw-r--r--drivers/s390/scsi/zfcp_fc.c11
3 files changed, 17 insertions, 3 deletions
diff --git a/drivers/s390/scsi/zfcp_aux.c b/drivers/s390/scsi/zfcp_aux.c
index 58bb177..9d0c941 100644
--- a/drivers/s390/scsi/zfcp_aux.c
+++ b/drivers/s390/scsi/zfcp_aux.c
@@ -179,6 +179,11 @@ static int __init zfcp_module_init(void)
if (!zfcp_data.gid_pn_cache)
goto out_gid_cache;
+ zfcp_data.adisc_cache = zfcp_cache_hw_align("zfcp_adisc",
+ sizeof(struct zfcp_fc_els_adisc));
+ if (!zfcp_data.adisc_cache)
+ goto out_adisc_cache;
+
zfcp_data.scsi_transport_template =
fc_attach_transport(&zfcp_transport_functions);
if (!zfcp_data.scsi_transport_template)
@@ -206,6 +211,8 @@ out_ccw_register:
out_misc:
fc_release_transport(zfcp_data.scsi_transport_template);
out_transport:
+ kmem_cache_destroy(zfcp_data.adisc_cache);
+out_adisc_cache:
kmem_cache_destroy(zfcp_data.gid_pn_cache);
out_gid_cache:
kmem_cache_destroy(zfcp_data.sr_buffer_cache);
@@ -224,6 +231,7 @@ static void __exit zfcp_module_exit(void)
ccw_driver_unregister(&zfcp_ccw_driver);
misc_deregister(&zfcp_cfdc_misc);
fc_release_transport(zfcp_data.scsi_transport_template);
+ kmem_cache_destroy(zfcp_data.adisc_cache);
kmem_cache_destroy(zfcp_data.gid_pn_cache);
kmem_cache_destroy(zfcp_data.sr_buffer_cache);
kmem_cache_destroy(zfcp_data.qtcb_cache);
diff --git a/drivers/s390/scsi/zfcp_def.h b/drivers/s390/scsi/zfcp_def.h
index 21b2980..469d57f 100644
--- a/drivers/s390/scsi/zfcp_def.h
+++ b/drivers/s390/scsi/zfcp_def.h
@@ -347,6 +347,7 @@ struct zfcp_data {
struct kmem_cache *qtcb_cache;
struct kmem_cache *sr_buffer_cache;
struct kmem_cache *gid_pn_cache;
+ struct kmem_cache *adisc_cache;
};
/********************** ZFCP SPECIFIC DEFINES ********************************/
diff --git a/drivers/s390/scsi/zfcp_fc.c b/drivers/s390/scsi/zfcp_fc.c
index 6d5ccc0..ac5e3b7 100644
--- a/drivers/s390/scsi/zfcp_fc.c
+++ b/drivers/s390/scsi/zfcp_fc.c
@@ -389,15 +389,16 @@ static void zfcp_fc_adisc_handler(void *data)
out:
atomic_clear_mask(ZFCP_STATUS_PORT_LINK_TEST, &port->status);
put_device(&port->sysfs_device);
- kfree(adisc);
+ kmem_cache_free(zfcp_data.adisc_cache, adisc);
}
static int zfcp_fc_adisc(struct zfcp_port *port)
{
struct zfcp_fc_els_adisc *adisc;
struct zfcp_adapter *adapter = port->adapter;
+ int ret;
- adisc = kzalloc(sizeof(struct zfcp_fc_els_adisc), GFP_ATOMIC);
+ adisc = kmem_cache_alloc(zfcp_data.adisc_cache, GFP_ATOMIC);
if (!adisc)
return -ENOMEM;
@@ -420,7 +421,11 @@ static int zfcp_fc_adisc(struct zfcp_port *port)
hton24(adisc->adisc_req.adisc_port_id,
fc_host_port_id(adapter->scsi_host));
- return zfcp_fsf_send_els(adapter, port->d_id, &adisc->els);
+ ret = zfcp_fsf_send_els(adapter, port->d_id, &adisc->els);
+ if (ret)
+ kmem_cache_free(zfcp_data.adisc_cache, adisc);
+
+ return ret;
}
void zfcp_fc_link_test_work(struct work_struct *work)
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