From: Rahul Lakkireddy rahul.lakkireddy@chelsio.com
[ Upstream commit 79a7482249a7353bc86aff8127954d5febf02472 ]
Both cxgb4 and csiostor drivers run on their own independent Physical Function. But when cxgb4 and csiostor are both being loaded in parallel via modprobe, there is a race when firmware upgrade is attempted by both the drivers.
When the cxgb4 driver initiates the firmware upgrade, it halts the firmware and the chip until upgrade is complete. When the csiostor driver is coming up in parallel, the firmware mailbox communication fails with timeouts and the csiostor driver probe fails.
Add a module soft dependency on cxgb4 driver to ensure loading csiostor triggers cxgb4 to load first when available to avoid the firmware upgrade race.
Link: https://lore.kernel.org/r/1632759248-15382-1-git-send-email-rahul.lakkireddy... Fixes: a3667aaed569 ("[SCSI] csiostor: Chelsio FCoE offload driver") Signed-off-by: Rahul Lakkireddy rahul.lakkireddy@chelsio.com Signed-off-by: Martin K. Petersen martin.petersen@oracle.com Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/scsi/csiostor/csio_init.c | 1 + 1 file changed, 1 insertion(+)
diff --git a/drivers/scsi/csiostor/csio_init.c b/drivers/scsi/csiostor/csio_init.c index 03c7b1603dbc..c64db2047efc 100644 --- a/drivers/scsi/csiostor/csio_init.c +++ b/drivers/scsi/csiostor/csio_init.c @@ -1260,3 +1260,4 @@ MODULE_DEVICE_TABLE(pci, csio_pci_tbl); MODULE_VERSION(CSIO_DRV_VERSION); MODULE_FIRMWARE(FW_FNAME_T5); MODULE_FIRMWARE(FW_FNAME_T6); +MODULE_SOFTDEP("pre: cxgb4");