From: Miaoqian Lin linmq006@gmail.com
stable inclusion from stable-v5.10.124 commit 2b2180449ae0199bcdb3d67f6d3a40e532de928f category: bugfix bugzilla: https://gitee.com/openeuler/kernel/issues/I5L6E7
Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=...
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[ Upstream commit 1c245358ce0b13669f6d1625f7a4e05c41f28980 ]
platform_get_irq() returns negative error number instead 0 on failure. And the doc of platform_get_irq() provides a usage example:
int irq = platform_get_irq(pdev, 0); if (irq < 0) return irq;
Fix the check of return value to catch errors correctly.
Fixes: eb1f2930609b ("Driver for the Atmel on-chip SSC on AT32AP and AT91") Reviewed-by: Claudiu Beznea claudiu.beznea@microchip.com Signed-off-by: Miaoqian Lin linmq006@gmail.com Link: https://lore.kernel.org/r/20220601123026.7119-1-linmq006@gmail.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org Signed-off-by: Sasha Levin sashal@kernel.org Signed-off-by: Zheng Zengkai zhengzengkai@huawei.com Reviewed-by: Wei Li liwei391@huawei.com --- drivers/misc/atmel-ssc.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/misc/atmel-ssc.c b/drivers/misc/atmel-ssc.c index d6cd5537126c..69f9b0336410 100644 --- a/drivers/misc/atmel-ssc.c +++ b/drivers/misc/atmel-ssc.c @@ -232,9 +232,9 @@ static int ssc_probe(struct platform_device *pdev) clk_disable_unprepare(ssc->clk);
ssc->irq = platform_get_irq(pdev, 0); - if (!ssc->irq) { + if (ssc->irq < 0) { dev_dbg(&pdev->dev, "could not get irq\n"); - return -ENXIO; + return ssc->irq; }
mutex_lock(&user_lock);