The MBX_TIMEOUT return code is not handled in lpfc_get_sfp_info and
the routine unconditionally frees submitted mailbox commands regardless of
return status. The issue is that for MBX_TIMEOUT cases, when firmware
returns SFP information at a later time, that same mailbox memory region
references previously freed memory in its cmpl routine.
Fix by adding checks for the MBX_TIMEOUT return code. During mailbox
resource cleanup, check the mbox flag to make sure that the wait did not
timeout. If the MBOX_WAKE flag is not set, then do not free the resources
because it will be freed when firmware completes the mailbox at a later
time in its cmpl routine.
Also, increase the timeout from 30 to 60 seconds to accommodate boot
scripts requiring longer timeouts.
Signed-off-by: Justin Tee <justin.tee@xxxxxxxxxxxx>
---
drivers/scsi/lpfc/lpfc_els.c | 17 +++++++++++------
1 file changed, 11 insertions(+), 6 deletions(-)
diff --git a/drivers/scsi/lpfc/lpfc_els.c b/drivers/scsi/lpfc/lpfc_els.c
index b27ebb574bfb..929cbfc95163 100644
--- a/drivers/scsi/lpfc/lpfc_els.c
+++ b/drivers/scsi/lpfc/lpfc_els.c
@@ -7302,13 +7302,13 @@ int lpfc_get_sfp_info_wait(struct lpfc_hba *phba,
mbox->u.mqe.un.mem_dump_type3.addr_hi = putPaddrHigh(mp->phys);
}
mbox->vport = phba->pport;
-
- rc = lpfc_sli_issue_mbox_wait(phba, mbox, 30);
+ rc = lpfc_sli_issue_mbox_wait(phba, mbox, LPFC_MBOX_SLI4_CONFIG_TMO);
if (rc == MBX_NOT_FINISHED) {
rc = 1;
goto error;
}
-
+ if (rc == MBX_TIMEOUT)
+ goto error;
if (phba->sli_rev == LPFC_SLI_REV4)
mp = mbox->ctx_buf;
else
@@ -7361,7 +7361,10 @@ int lpfc_get_sfp_info_wait(struct lpfc_hba *phba,
mbox->u.mqe.un.mem_dump_type3.addr_hi = putPaddrHigh(mp->phys);
}
- rc = lpfc_sli_issue_mbox_wait(phba, mbox, 30);
+ rc = lpfc_sli_issue_mbox_wait(phba, mbox, LPFC_MBOX_SLI4_CONFIG_TMO);
+
+ if (rc == MBX_TIMEOUT)
+ goto error;
if (bf_get(lpfc_mqe_status, &mbox->u.mqe)) {
rc = 1;
goto error;
@@ -7372,8 +7375,10 @@ int lpfc_get_sfp_info_wait(struct lpfc_hba *phba,
DMP_SFF_PAGE_A2_SIZE);
error:
- mbox->ctx_buf = mpsave;
- lpfc_mbox_rsrc_cleanup(phba, mbox, MBOX_THD_UNLOCKED);
+ if (mbox->mbox_flag & LPFC_MBX_WAKE) {
+ mbox->ctx_buf = mpsave;
+ lpfc_mbox_rsrc_cleanup(phba, mbox, MBOX_THD_UNLOCKED);
+ }
return rc;
--
2.38.0
