This is a note to let you know that I've just added the patch titled
spi: ppc4xx: handle irq_of_parse_and_map() errors
to the 4.19-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
spi-ppc4xx-handle-irq_of_parse_and_map-errors.patch
and it can be found in the queue-4.19 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 6c4e13cd2945c92bd38219a64b0e36ed8380d8fb
Author: Ma Ke <make24@xxxxxxxxxxx>
Date: Wed Jul 24 16:40:47 2024 +0800
spi: ppc4xx: handle irq_of_parse_and_map() errors
[ Upstream commit 0f245463b01ea254ae90e1d0389e90b0e7d8dc75 ]
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@xxxxxxxxxxx>
Link: https://patch.msgid.link/20240724084047.1506084-1-make24@xxxxxxxxxxx
Signed-off-by: Mark Brown <broonie@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/spi/spi-ppc4xx.c b/drivers/spi/spi-ppc4xx.c
index 58765a62fc15b..8a1290fb4dd9d 100644
--- a/drivers/spi/spi-ppc4xx.c
+++ b/drivers/spi/spi-ppc4xx.c
@@ -495,6 +495,9 @@ 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) {
