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[17/19] scsi: hisi_sas: fix SAS_QUEUE_FULL problem while running IO

Message ID 1512753410-50924-18-git-send-email-john.garry@huawei.com (mailing list archive)
State Accepted
Headers show

Commit Message

John Garry Dec. 8, 2017, 5:16 p.m. UTC 
From: Xiang Chen <chenxiang66@hisilicon.com>

This patch fix SAS_QUEUE_FULL problem. The test situation is
close port while running IO.

In sas_eh_handle_sas_errors(), SCSI EH will free sas_task of
the device if lldd_I_T_nexus_reset() return
TMF_RESP_FUNC_COMPLETE or -ENODEV.
But in our SAS driver, we only free slots of the device when
the return value is TMF_RESP_FUNC_COMPLETE. So if the return
value is -ENODEV, the slot resource will not free any more.

As an solution, we should also free slots of the device in
lldd_I_T_nexus_reset() if the return value is -ENODEV.

Signed-off-by: Xiaofei Tan <tanxiaofei@huawei.com>
Signed-off-by: John Garry <john.garry@huawei.com>
---
 drivers/scsi/hisi_sas/hisi_sas_main.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
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Patch

diff --git a/drivers/scsi/hisi_sas/hisi_sas_main.c b/drivers/scsi/hisi_sas/hisi_sas_main.c
index 302da84..9bd98e5 100644
--- a/drivers/scsi/hisi_sas/hisi_sas_main.c
+++ b/drivers/scsi/hisi_sas/hisi_sas_main.c
@@ -1308,7 +1308,7 @@  static int hisi_sas_I_T_nexus_reset(struct domain_device *device)
 
 	rc = hisi_sas_debug_I_T_nexus_reset(device);
 
-	if (rc == TMF_RESP_FUNC_COMPLETE) {
+	if ((rc == TMF_RESP_FUNC_COMPLETE) || (rc == -ENODEV)) {
 		spin_lock_irqsave(&hisi_hba->lock, flags);
 		hisi_sas_release_task(hisi_hba, device);
 		spin_unlock_irqrestore(&hisi_hba->lock, flags);