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scsi: lpfc: Handle mailbox timeouts in lpfc_get_sfp_info

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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@broadcom.com>
Link: https://lore.kernel.org/r/20240628172011.25921-6-justintee8345@gmail.com
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Justin Tee 2024-06-28 10:20:08 -07:00 committed by Martin K. Petersen
parent 15e21dc6d6
commit ede596b143
1 changed files with 11 additions and 6 deletions
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13
drivers/scsi/lpfc/lpfc_els.c
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@ -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:
if (mbox->mbox_flag & LPFC_MBX_WAKE) {
mbox->ctx_buf = mpsave;
lpfc_mbox_rsrc_cleanup(phba, mbox, MBOX_THD_UNLOCKED);
}
return rc;