[PATCH 5.11 370/601] scsi: sun3x_esp: Add IRQ check

Greg Kroah-Hartman
2021-05-12T17:41:48Z

From: Sergey Shtylyov <s.shtylyov@omprussia.ru>

[ Upstream commit 14b321380eb333c82853d7d612d0995f05f88fdc ]

The driver neglects to check the result of platform_get_irq()'s call and
blithely passes the negative error codes to request_irq() (which takes
*unsigned* IRQ #), causing it to fail with -EINVAL, overriding the real
error code. Stop calling request_irq() with the invalid IRQ #s.

Link: https://lore.kernel.org/r/363eb4c8-a3bf-4dc9-2a9e-90f349030a15@omprussia.ru
Fixes: 0bb67f181834 ("[SCSI] sun3x_esp: convert to esp_scsi")
Signed-off-by: Sergey Shtylyov <s.shtylyov@omprussia.ru>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/scsi/sun3x_esp.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/scsi/sun3x_esp.c b/drivers/scsi/sun3x_esp.c
index 7de82f2c9757..d3489ac7ab28 100644
--- a/drivers/scsi/sun3x_esp.c
+++ b/drivers/scsi/sun3x_esp.c
@@ -206,7 +206,9 @@ static int esp_sun3x_probe(struct platform_device *dev)
if (!esp->command_block)
goto fail_unmap_regs_dma;

- host->irq = platform_get_irq(dev, 0);
+ host->irq = err = platform_get_irq(dev, 0);
+ if (err < 0)
+ goto fail_unmap_command_block;
err = request_irq(host->irq, scsi_esp_intr, IRQF_SHARED,
"SUN3X ESP", esp);
if (err < 0)
--
2.30.2