This is a note to let you know that I've just added the patch titled
scsi: lpfc: Add ELS_RSP cmd to the list of WQEs to flush in lpfc_els_flush_cmd()
to the 6.6-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
scsi-lpfc-add-els_rsp-cmd-to-the-list-of-wqes-to-flu.patch
and it can be found in the queue-6.6 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit fd749c19e1311f89c79a82fc3ebf044e90f878dd
Author: Justin Tee <justin.tee@xxxxxxxxxxxx>
Date: Thu Sep 12 16:24:40 2024 -0700
scsi: lpfc: Add ELS_RSP cmd to the list of WQEs to flush in lpfc_els_flush_cmd()
[ Upstream commit 93bcc5f3984bf4f51da1529700aec351872dbfff ]
During HBA stress testing, a spam of received PLOGIs exposes a resource
recovery bug causing leakage of lpfc_sqlq entries from the global
phba->sli4_hba.lpfc_els_sgl_list.
The issue is in lpfc_els_flush_cmd(), where the driver attempts to recover
outstanding ELS sgls when walking the txcmplq. Only CMD_ELS_REQUEST64_CRs
and CMD_GEN_REQUEST64_CRs are added to the abort and cancel lists. A check
for CMD_XMIT_ELS_RSP64_WQE is missing in order to recover LS_ACC usages of
the phba->sli4_hba.lpfc_els_sgl_list too.
Fix by adding CMD_XMIT_ELS_RSP64_WQE as part of the txcmplq walk when
adding WQEs to the abort and cancel list in lpfc_els_flush_cmd(). Also,
update naming convention from CRs to WQEs.
Signed-off-by: Justin Tee <justin.tee@xxxxxxxxxxxx>
Link: https://lore.kernel.org/r/20240912232447.45607-2-justintee8345@xxxxxxxxx
Signed-off-by: Martin K. Petersen <martin.petersen@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/scsi/lpfc/lpfc_els.c b/drivers/scsi/lpfc/lpfc_els.c
index f67d72160d36e..ebe84bb7bb3dd 100644
--- a/drivers/scsi/lpfc/lpfc_els.c
+++ b/drivers/scsi/lpfc/lpfc_els.c
@@ -9649,11 +9649,12 @@ lpfc_els_flush_cmd(struct lpfc_vport *vport)
if (piocb->cmd_flag & LPFC_DRIVER_ABORTED && !mbx_tmo_err)
continue;
- /* On the ELS ring we can have ELS_REQUESTs or
- * GEN_REQUESTs waiting for a response.
+ /* On the ELS ring we can have ELS_REQUESTs, ELS_RSPs,
+ * or GEN_REQUESTs waiting for a CQE response.
*/
ulp_command = get_job_cmnd(phba, piocb);
- if (ulp_command == CMD_ELS_REQUEST64_CR) {
+ if (ulp_command == CMD_ELS_REQUEST64_WQE ||
+ ulp_command == CMD_XMIT_ELS_RSP64_WQE) {
list_add_tail(&piocb->dlist, &abort_list);
/* If the link is down when flushing ELS commands
