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misc: atmel-ssc: Fix IRQ check in ssc_probe

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[ Upstream commit 1c245358ce ]

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: eb1f293060 ("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>
This commit is contained in:
Miaoqian Lin 2022-06-01 16:30:26 +04:00 committed by Greg Kroah-Hartman
parent c4b0b8edcc
commit 6b689129bf
1 changed files with 2 additions and 2 deletions
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4
drivers/misc/atmel-ssc.c
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@ -235,9 +235,9 @@ 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);