[PATCH 4.19 10/35] ata: sata_mv: Fix the error handling of mv_chip_id()

Greg Kroah-Hartman
2021-11-01T09:25:06Z

From: Zheyu Ma <zheyuma97@gmail.com>

commit a0023bb9dd9bc439d44604eeec62426a990054cd upstream.

mv_init_host() propagates the value returned by mv_chip_id() which in turn
gets propagated by mv_pci_init_one() and hits local_pci_probe().

During the process of driver probing, the probe function should return < 0
for failure, otherwise, the kernel will treat value > 0 as success.

Since this is a bug rather than a recoverable runtime error we should
use dev_alert() instead of dev_err().

Signed-off-by: Zheyu Ma <zheyuma97@gmail.com>
Signed-off-by: Damien Le Moal <damien.lemoal@opensource.wdc.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/ata/sata_mv.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)

--- a/drivers/ata/sata_mv.c
+++ b/drivers/ata/sata_mv.c
@@ -3905,8 +3905,8 @@ static int mv_chip_id(struct ata_host *h
break;

default:
- dev_err(host->dev, "BUG: invalid board index %u\n", board_idx);
- return 1;
+ dev_alert(host->dev, "BUG: invalid board index %u\n", board_idx);
+ return -EINVAL;
}

hpriv->hp_flags = hp_flags;