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authorBhanu Prakash Gollapudi <bprakash@broadcom.com>2012-06-07 02:19:35 -0700
committerJames Bottomley <JBottomley@Parallels.com>2012-07-20 08:58:23 +0100
commit5c17ae217ad13463f821c3bab774335777da9c33 (patch)
tree681652b5df7088693a49d697b17d84fd261425c4
parentd075498c987623107f7bface4dad72fe9260a0d3 (diff)
downloadop-kernel-dev-5c17ae217ad13463f821c3bab774335777da9c33.zip
op-kernel-dev-5c17ae217ad13463f821c3bab774335777da9c33.tar.gz
[SCSI] bnx2fc: Improve error recovery by handling parity errors
During parity errors, the ramrods are not issued to FW. bnx2fc waits for the timeout value, and proceeds with cleaning up the IOs. Since we are already out-of-sync with FW, cleanup commands timeout too, and do not get the completion. This operation takes 36 secs for each session to upload causing huge delays. To fix this, bnx2fc now gets a PARITY_ERROR from cnic driver, and upon failure, the driver does not issue any commands to the FW and finishes the upload process sooner. Signed-off-by: Bhanu Prakash Gollapudi <bprakash@broadcom.com> Signed-off-by: James Bottomley <JBottomley@Parallels.com>
-rw-r--r--drivers/scsi/bnx2fc/bnx2fc.h1
-rw-r--r--drivers/scsi/bnx2fc/bnx2fc_hwi.c4
-rw-r--r--drivers/scsi/bnx2fc/bnx2fc_tgt.c25
3 files changed, 24 insertions, 6 deletions
diff --git a/drivers/scsi/bnx2fc/bnx2fc.h b/drivers/scsi/bnx2fc/bnx2fc.h
index 2f1bea4..baac6e9 100644
--- a/drivers/scsi/bnx2fc/bnx2fc.h
+++ b/drivers/scsi/bnx2fc/bnx2fc.h
@@ -275,6 +275,7 @@ struct bnx2fc_rport {
#define BNX2FC_FLAG_CTX_ALLOC_FAILURE 0x6
#define BNX2FC_FLAG_UPLD_REQ_COMPL 0x7
#define BNX2FC_FLAG_EXPL_LOGO 0x8
+#define BNX2FC_FLAG_DISABLE_FAILED 0x9
u8 src_addr[ETH_ALEN];
u32 max_sqes;
diff --git a/drivers/scsi/bnx2fc/bnx2fc_hwi.c b/drivers/scsi/bnx2fc/bnx2fc_hwi.c
index 2ca6bfe..6d6eee4 100644
--- a/drivers/scsi/bnx2fc/bnx2fc_hwi.c
+++ b/drivers/scsi/bnx2fc/bnx2fc_hwi.c
@@ -1244,7 +1244,9 @@ static void bnx2fc_process_conn_disable_cmpl(struct bnx2fc_hba *hba,
if (disable_kcqe->completion_status) {
printk(KERN_ERR PFX "Disable failed with cmpl status %d\n",
disable_kcqe->completion_status);
- return;
+ set_bit(BNX2FC_FLAG_DISABLE_FAILED, &tgt->flags);
+ set_bit(BNX2FC_FLAG_UPLD_REQ_COMPL, &tgt->flags);
+ wake_up_interruptible(&tgt->upld_wait);
} else {
/* disable successful */
BNX2FC_TGT_DBG(tgt, "disable successful\n");
diff --git a/drivers/scsi/bnx2fc/bnx2fc_tgt.c b/drivers/scsi/bnx2fc/bnx2fc_tgt.c
index 082a25c..85ffdea 100644
--- a/drivers/scsi/bnx2fc/bnx2fc_tgt.c
+++ b/drivers/scsi/bnx2fc/bnx2fc_tgt.c
@@ -181,8 +181,14 @@ void bnx2fc_flush_active_ios(struct bnx2fc_rport *tgt)
set_bit(BNX2FC_FLAG_IO_COMPL, &io_req->req_flags);
set_bit(BNX2FC_FLAG_IO_CLEANUP, &io_req->req_flags);
- rc = bnx2fc_initiate_cleanup(io_req);
- BUG_ON(rc);
+
+ /* Do not issue cleanup when disable request failed */
+ if (test_bit(BNX2FC_FLAG_DISABLE_FAILED, &tgt->flags))
+ bnx2fc_process_cleanup_compl(io_req, io_req->task, 0);
+ else {
+ rc = bnx2fc_initiate_cleanup(io_req);
+ BUG_ON(rc);
+ }
}
list_for_each_safe(list, tmp, &tgt->active_tm_queue) {
@@ -212,8 +218,13 @@ void bnx2fc_flush_active_ios(struct bnx2fc_rport *tgt)
io_req->cb_arg = NULL;
}
- rc = bnx2fc_initiate_cleanup(io_req);
- BUG_ON(rc);
+ /* Do not issue cleanup when disable request failed */
+ if (test_bit(BNX2FC_FLAG_DISABLE_FAILED, &tgt->flags))
+ bnx2fc_process_cleanup_compl(io_req, io_req->task, 0);
+ else {
+ rc = bnx2fc_initiate_cleanup(io_req);
+ BUG_ON(rc);
+ }
}
list_for_each_safe(list, tmp, &tgt->io_retire_queue) {
@@ -321,9 +332,13 @@ static void bnx2fc_upload_session(struct fcoe_port *port,
del_timer_sync(&tgt->upld_timer);
- } else
+ } else if (test_bit(BNX2FC_FLAG_DISABLE_FAILED, &tgt->flags)) {
+ printk(KERN_ERR PFX "ERROR!! DISABLE req failed, destroy"
+ " not sent to FW\n");
+ } else {
printk(KERN_ERR PFX "ERROR!! DISABLE req timed out, destroy"
" not sent to FW\n");
+ }
/* Free session resources */
bnx2fc_free_session_resc(hba, tgt);
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