scsi: lpfc: Fix panic when FW-log buffsize is not initialized
While trying to get adapter fw-log for a function whose buffsize was set to
0, kernel panic occurred.
When buffsize is 0, the kernel buffer for the log won't be allocated. When
fw log usage was enabled, it failed to check the buffer size, and log usage
was started. Eventually the driver referenced the unallocated log buffer.
Added checks of the buffer size before allowing fw logging to be enabled
and added check for valid buffer if enabling fw log.
Performed a couple other minor cleanups while fixing this:
- clarified log messages
- re-evaluated log message severity
- treat any error as an error, not only a couple codes
Signed-off-by: Dick Kennedy <dick.kennedy@broadcom.com>
Signed-off-by: James Smart <jsmart2021@gmail.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
diff --git a/drivers/scsi/lpfc/lpfc_init.c b/drivers/scsi/lpfc/lpfc_init.c
index 7d81355..d20a55a 100644
--- a/drivers/scsi/lpfc/lpfc_init.c
+++ b/drivers/scsi/lpfc/lpfc_init.c
@@ -12635,7 +12635,8 @@ lpfc_sli4_ras_init(struct lpfc_hba *phba)
case PCI_DEVICE_ID_LANCER_G6_FC:
case PCI_DEVICE_ID_LANCER_G7_FC:
phba->ras_fwlog.ras_hwsupport = true;
- if (phba->cfg_ras_fwlog_func == PCI_FUNC(phba->pcidev->devfn))
+ if (phba->cfg_ras_fwlog_func == PCI_FUNC(phba->pcidev->devfn) &&
+ phba->cfg_ras_fwlog_buffsize)
phba->ras_fwlog.ras_enabled = true;
else
phba->ras_fwlog.ras_enabled = false;