* [v2 PATCH 1/3] bnx2fc: Improve error recovery by handling parity errors
2012-06-07 9:19 [v2 PATCH 0/3] bnx2fc version 1.0.12 Bhanu Prakash Gollapudi
@ 2012-06-07 9:19 ` Bhanu Prakash Gollapudi
2012-06-07 9:19 ` [v2 PATCH 2/3] bnx2fc: use list_entry instead of explicit cast Bhanu Prakash Gollapudi
2012-06-07 9:19 ` [v2 PATCH 3/3] bnx2fc: Bumped version to 1.0.12 Bhanu Prakash Gollapudi
2 siblings, 0 replies; 4+ messages in thread
From: Bhanu Prakash Gollapudi @ 2012-06-07 9:19 UTC (permalink / raw)
To: JBottomley, linux-scsi; +Cc: michaelc, Bhanu Prakash Gollapudi
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>
---
drivers/scsi/bnx2fc/bnx2fc.h | 1 +
drivers/scsi/bnx2fc/bnx2fc_hwi.c | 4 +++-
drivers/scsi/bnx2fc/bnx2fc_tgt.c | 25 ++++++++++++++++++++-----
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);
--
1.7.0.6
^ permalink raw reply related [flat|nested] 4+ messages in thread* [v2 PATCH 2/3] bnx2fc: use list_entry instead of explicit cast
2012-06-07 9:19 [v2 PATCH 0/3] bnx2fc version 1.0.12 Bhanu Prakash Gollapudi
2012-06-07 9:19 ` [v2 PATCH 1/3] bnx2fc: Improve error recovery by handling parity errors Bhanu Prakash Gollapudi
@ 2012-06-07 9:19 ` Bhanu Prakash Gollapudi
2012-06-07 9:19 ` [v2 PATCH 3/3] bnx2fc: Bumped version to 1.0.12 Bhanu Prakash Gollapudi
2 siblings, 0 replies; 4+ messages in thread
From: Bhanu Prakash Gollapudi @ 2012-06-07 9:19 UTC (permalink / raw)
To: JBottomley, linux-scsi; +Cc: michaelc, Bhanu Prakash Gollapudi
Use list_for_each_entry_safe() instead of explicit cast to avoid relying on
struct layout
Signed-off-by: Bhanu Prakash Gollapudi <bprakash@broadcom.com>
---
drivers/scsi/bnx2fc/bnx2fc_fcoe.c | 5 +----
drivers/scsi/bnx2fc/bnx2fc_io.c | 21 +++++++--------------
drivers/scsi/bnx2fc/bnx2fc_tgt.c | 15 +++++----------
3 files changed, 13 insertions(+), 28 deletions(-)
diff --git a/drivers/scsi/bnx2fc/bnx2fc_fcoe.c b/drivers/scsi/bnx2fc/bnx2fc_fcoe.c
index f75308c..2fd7c26 100644
--- a/drivers/scsi/bnx2fc/bnx2fc_fcoe.c
+++ b/drivers/scsi/bnx2fc/bnx2fc_fcoe.c
@@ -2151,13 +2151,10 @@ mod_err:
**/
static struct bnx2fc_hba *bnx2fc_find_hba_for_cnic(struct cnic_dev *cnic)
{
- struct list_head *list;
- struct list_head *temp;
struct bnx2fc_hba *hba;
/* Called with bnx2fc_dev_lock held */
- list_for_each_safe(list, temp, &adapter_list) {
- hba = (struct bnx2fc_hba *)list;
+ list_for_each_entry(hba, &adapter_list, list) {
if (hba->cnic == cnic)
return hba;
}
diff --git a/drivers/scsi/bnx2fc/bnx2fc_io.c b/drivers/scsi/bnx2fc/bnx2fc_io.c
index 4f7453b..1dfe5ee 100644
--- a/drivers/scsi/bnx2fc/bnx2fc_io.c
+++ b/drivers/scsi/bnx2fc/bnx2fc_io.c
@@ -405,11 +405,10 @@ free_cmd_pool:
goto free_cmgr;
for (i = 0; i < num_possible_cpus() + 1; i++) {
- struct list_head *list;
- struct list_head *tmp;
+ struct bnx2fc_cmd *tmp, *io_req;
- list_for_each_safe(list, tmp, &cmgr->free_list[i]) {
- struct bnx2fc_cmd *io_req = (struct bnx2fc_cmd *)list;
+ list_for_each_entry_safe(io_req, tmp,
+ &cmgr->free_list[i], link) {
list_del(&io_req->link);
kfree(io_req);
}
@@ -1436,9 +1435,7 @@ static void bnx2fc_lun_reset_cmpl(struct bnx2fc_cmd *io_req)
{
struct scsi_cmnd *sc_cmd = io_req->sc_cmd;
struct bnx2fc_rport *tgt = io_req->tgt;
- struct list_head *list;
- struct list_head *tmp;
- struct bnx2fc_cmd *cmd;
+ struct bnx2fc_cmd *cmd, *tmp;
int tm_lun = sc_cmd->device->lun;
int rc = 0;
int lun;
@@ -1449,9 +1446,8 @@ static void bnx2fc_lun_reset_cmpl(struct bnx2fc_cmd *io_req)
* Walk thru the active_ios queue and ABORT the IO
* that matches with the LUN that was reset
*/
- list_for_each_safe(list, tmp, &tgt->active_cmd_queue) {
+ list_for_each_entry_safe(cmd, tmp, &tgt->active_cmd_queue, link) {
BNX2FC_TGT_DBG(tgt, "LUN RST cmpl: scan for pending IOs\n");
- cmd = (struct bnx2fc_cmd *)list;
lun = cmd->sc_cmd->device->lun;
if (lun == tm_lun) {
/* Initiate ABTS on this cmd */
@@ -1476,9 +1472,7 @@ static void bnx2fc_lun_reset_cmpl(struct bnx2fc_cmd *io_req)
static void bnx2fc_tgt_reset_cmpl(struct bnx2fc_cmd *io_req)
{
struct bnx2fc_rport *tgt = io_req->tgt;
- struct list_head *list;
- struct list_head *tmp;
- struct bnx2fc_cmd *cmd;
+ struct bnx2fc_cmd *cmd, *tmp;
int rc = 0;
/* called with tgt_lock held */
@@ -1487,9 +1481,8 @@ static void bnx2fc_tgt_reset_cmpl(struct bnx2fc_cmd *io_req)
* Walk thru the active_ios queue and ABORT the IO
* that matches with the LUN that was reset
*/
- list_for_each_safe(list, tmp, &tgt->active_cmd_queue) {
+ list_for_each_entry_safe(cmd, tmp, &tgt->active_cmd_queue, link) {
BNX2FC_TGT_DBG(tgt, "TGT RST cmpl: scan for pending IOs\n");
- cmd = (struct bnx2fc_cmd *)list;
/* Initiate ABTS */
if (!test_and_set_bit(BNX2FC_FLAG_ISSUE_ABTS,
&cmd->req_flags)) {
diff --git a/drivers/scsi/bnx2fc/bnx2fc_tgt.c b/drivers/scsi/bnx2fc/bnx2fc_tgt.c
index 85ffdea..b9d0d9c 100644
--- a/drivers/scsi/bnx2fc/bnx2fc_tgt.c
+++ b/drivers/scsi/bnx2fc/bnx2fc_tgt.c
@@ -150,8 +150,7 @@ tgt_init_err:
void bnx2fc_flush_active_ios(struct bnx2fc_rport *tgt)
{
struct bnx2fc_cmd *io_req;
- struct list_head *list;
- struct list_head *tmp;
+ struct bnx2fc_cmd *tmp;
int rc;
int i = 0;
BNX2FC_TGT_DBG(tgt, "Entered flush_active_ios - %d\n",
@@ -160,9 +159,8 @@ void bnx2fc_flush_active_ios(struct bnx2fc_rport *tgt)
spin_lock_bh(&tgt->tgt_lock);
tgt->flush_in_prog = 1;
- list_for_each_safe(list, tmp, &tgt->active_cmd_queue) {
+ list_for_each_entry_safe(io_req, tmp, &tgt->active_cmd_queue, link) {
i++;
- io_req = (struct bnx2fc_cmd *)list;
list_del_init(&io_req->link);
io_req->on_active_queue = 0;
BNX2FC_IO_DBG(io_req, "cmd_queue cleanup\n");
@@ -191,9 +189,8 @@ void bnx2fc_flush_active_ios(struct bnx2fc_rport *tgt)
}
}
- list_for_each_safe(list, tmp, &tgt->active_tm_queue) {
+ list_for_each_entry_safe(io_req, tmp, &tgt->active_tm_queue, link) {
i++;
- io_req = (struct bnx2fc_cmd *)list;
list_del_init(&io_req->link);
io_req->on_tmf_queue = 0;
BNX2FC_IO_DBG(io_req, "tm_queue cleanup\n");
@@ -201,9 +198,8 @@ void bnx2fc_flush_active_ios(struct bnx2fc_rport *tgt)
complete(&io_req->tm_done);
}
- list_for_each_safe(list, tmp, &tgt->els_queue) {
+ list_for_each_entry_safe(io_req, tmp, &tgt->els_queue, link) {
i++;
- io_req = (struct bnx2fc_cmd *)list;
list_del_init(&io_req->link);
io_req->on_active_queue = 0;
@@ -227,9 +223,8 @@ void bnx2fc_flush_active_ios(struct bnx2fc_rport *tgt)
}
}
- list_for_each_safe(list, tmp, &tgt->io_retire_queue) {
+ list_for_each_entry_safe(io_req, tmp, &tgt->io_retire_queue, link) {
i++;
- io_req = (struct bnx2fc_cmd *)list;
list_del_init(&io_req->link);
BNX2FC_IO_DBG(io_req, "retire_queue flush\n");
--
1.7.0.6
^ permalink raw reply related [flat|nested] 4+ messages in thread