# \[PATCH\] video: fbdev: pxa3xx\_gcu: fix error return code in pxa3xx\_gcu\_probe()

- Subsystems: FRAMEBUFFER LAYER, THE REST
- Maintainers: Helge Deller, Linus Torvalds
- List: linux-fbdev
- 2 messages, 2 authors
- Page: https://ratatoskr.run/linux-fbdev/2017/08/5062474/t

## \[PATCH\] video: fbdev: pxa3xx\_gcu: fix error return code in pxa3xx\_gcu\_probe()

- From: Gustavo A. R. Silva \<hidden\>
- Date: 2017-08-08 22:17:34 
- Message: https://ratatoskr.run/linux-fbdev/2017/08/5062474.md

```text
platform_get_irq() returns an error code, but the pxa3xx_gcu driver
ignores it and always returns -ENODEV. This is not correct and,
prevents -EPROBE_DEFER from being propagated properly.

Also, notice that platform_get_irq() no longer returns 0 on error:
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?idã30b9a6bb35dc7097a4f02cb1ae7b6f96df92af

Print and propagate the return value of platform_get_irq on failure.

This issue was detected with the help of Coccinelle.

Signed-off-by: Gustavo A. R. Silva <redacted>
---
 drivers/video/fbdev/pxa3xx-gcu.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/video/fbdev/pxa3xx-gcu.c b/drivers/video/fbdev/pxa3xx-gcu.c
index 50bce45..933619d 100644
--- a/drivers/video/fbdev/pxa3xx-gcu.c
+++ b/drivers/video/fbdev/pxa3xx-gcu.c
@@ -626,8 +626,8 @@ static int pxa3xx_gcu_probe(struct platform_device *pdev)
 	/* request the IRQ */
 	irq = platform_get_irq(pdev, 0);
 	if (irq < 0) {
-		dev_err(dev, "no IRQ defined\n");
-		return -ENODEV;
+		dev_err(dev, "no IRQ defined: %d\n", irq);
+		return irq;
 	}
 
 	ret = devm_request_irq(dev, irq, pxa3xx_gcu_handle_irq,
-- 
2.5.0

```

## Re: \[PATCH\] video: fbdev: pxa3xx\_gcu: fix error return code in pxa3xx\_gcu\_probe()

- From: Bartlomiej Zolnierkiewicz \<hidden\>
- Date: 2017-08-21 14:18:05 
- Message: https://ratatoskr.run/linux-fbdev/2017/08/5072157.md

```text
On Tuesday, August 08, 2017 05:17:30 PM Gustavo A. R. Silva wrote:
> platform_get_irq() returns an error code, but the pxa3xx_gcu driver
> ignores it and always returns -ENODEV. This is not correct and,
> prevents -EPROBE_DEFER from being propagated properly.
> 
> Also, notice that platform_get_irq() no longer returns 0 on error:
> https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?idã30b9a6bb35dc7097a4f02cb1ae7b6f96df92af
> 
> Print and propagate the return value of platform_get_irq on failure.
> 
> This issue was detected with the help of Coccinelle.
> 
> Signed-off-by: Gustavo A. R. Silva <redacted>

Patch queued for 4.14, thanks.

Best regards,
--
Bartlomiej Zolnierkiewicz
Samsung R&D Institute Poland
Samsung Electronics

```