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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/20240722141822.1052370-1-make24@iscas.ac.cn
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Ma Ke 2024-07-22 22:18:22 +08:00 committed by Mark Brown
parent 1c4d834e4e
commit f1011ba20b
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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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@ -416,6 +416,9 @@ static int spi_ppc4xx_of_probe(struct platform_device *op)
if (hw->irqnum <= 0)
goto free_host;
if (hw->irqnum <= 0)
goto free_host;
ret = request_irq(hw->irqnum, spi_ppc4xx_int,
0, "spi_ppc4xx_of", (void *)hw);
if (ret) {