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authorMa Ke <make24@iscas.ac.cn>2024-07-24 16:40:47 +0800
committerMark Brown <broonie@kernel.org>2024-07-29 01:23:23 +0100
commit0f245463b01ea254ae90e1d0389e90b0e7d8dc75 (patch)
tree3834bf0daf4ae14b8681297ce13380f639c941b5 /drivers/spi
parent158678bea637020dd6fc521536c5b07701447777 (diff)
spi: ppc4xx: handle irq_of_parse_and_map() errors
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: 44dab88e7cc9 ("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>
Diffstat (limited to 'drivers/spi')
-rw-r--r--drivers/spi/spi-ppc4xx.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/spi/spi-ppc4xx.c b/drivers/spi/spi-ppc4xx.c
index 942c3117ab3a..01fdecbf132d 100644
--- a/drivers/spi/spi-ppc4xx.c
+++ b/drivers/spi/spi-ppc4xx.c
@@ -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) {