From: Zhang Shurong <zhang_shurong@xxxxxxxxxxx>
[ Upstream commit 4e88761f5f8c7869f15a2046b1a1116f4fab4ac8 ]
This func misses checking for platform_get_irq()'s call and may passes the
negative error codes to request_irq(), which takes unsigned IRQ #,
causing it to fail with -EINVAL, overriding an original error code.
Fix this by stop calling request_irq() with invalid IRQ #s.
Fixes: 1630d85a8312 ("au1200fb: fix hardcoded IRQ")
Signed-off-by: Zhang Shurong <zhang_shurong@xxxxxxxxxxx>
Signed-off-by: Helge Deller <deller@xxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
drivers/video/fbdev/au1200fb.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/drivers/video/fbdev/au1200fb.c b/drivers/video/fbdev/au1200fb.c
index f8e83a9519189..593c390e98629 100644
--- a/drivers/video/fbdev/au1200fb.c
+++ b/drivers/video/fbdev/au1200fb.c
@@ -1744,6 +1744,9 @@ static int au1200fb_drv_probe(struct platform_device *dev)
/* Now hook interrupt too */
irq = platform_get_irq(dev, 0);
+ if (irq < 0)
+ return irq;
+
ret = request_irq(irq, au1200fb_handle_irq,
IRQF_SHARED, "lcd", (void *)dev);
if (ret) {
--
2.39.2
