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spi: ppc4xx: handle irq_of_parse_and_map() errors

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Zero and negative number is not a valid IRQ for in-kernel code and the
irq_of_parse_and_map() function returns zero on error.  So this check for
valid IRQs should only accept values > 0.

Fixes: 44dab88e7c ("spi: add spi_ppc4xx driver")
Signed-off-by: Ma Ke <make24@iscas.ac.cn>
Link: https://patch.msgid.link/20240724084047.1506084-1-make24@iscas.ac.cn
Signed-off-by: Mark Brown <broonie@kernel.org>
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Ma Ke 2024-07-24 16:40:47 +08:00 committed by Mark Brown
parent 158678bea6
commit 0f245463b0
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1 changed files with 3 additions and 0 deletions
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3
drivers/spi/spi-ppc4xx.c
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@ -413,6 +413,9 @@ static int spi_ppc4xx_of_probe(struct platform_device *op)
/* Request IRQ */
hw->irqnum = irq_of_parse_and_map(np, 0);
if (hw->irqnum <= 0)
goto free_host;
ret = request_irq(hw->irqnum, spi_ppc4xx_int,
0, "spi_ppc4xx_of", (void *)hw);
if (ret) {