[PATCH] scsi: efct: clear MWI on remove

[Guangshuo Li]

efct_pci_probe() enables PCI Memory-Write-Invalidate with pci_set_mwi().
The probe failure path clears this state with pci_clear_mwi(), but the
normal remove path does not perform the corresponding cleanup.

pci_disable_device() only disables PCI bus mastering and does not clear
the PCI_COMMAND_INVALIDATE bit. As a result, the MWI configuration can
remain enabled after the driver is removed.

Call pci_clear_mwi() in efct_pci_remove(), matching the probe error
path.

This issue was found by manual code inspection.

Fixes: 4df84e8466242 ("scsi: elx: efct: Driver initialization routines")
Cc: stable@xxxxxxxxxxxxxxx
Signed-off-by: Guangshuo Li <lgs201920130244@xxxxxxxxx>
---
 drivers/scsi/elx/efct/efct_driver.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/scsi/elx/efct/efct_driver.c b/drivers/scsi/elx/efct/efct_driver.c
index 07c2f453459e..720bad7b3517 100644
--- a/drivers/scsi/elx/efct/efct_driver.c
+++ b/drivers/scsi/elx/efct/efct_driver.c
@@ -613,6 +613,7 @@ efct_pci_remove(struct pci_dev *pdev)
 
 	pci_release_regions(pdev);
 
+	pci_clear_mwi(pdev);
 	pci_disable_device(pdev);
 }
 
-- 
2.43.0