6.6-stable review patch. If anyone has any objections, please let me know.
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From: Bartosz Golaszewski bartosz.golaszewski@linaro.org
commit 1efbee6852f1ff698a9981bd731308dd027189fb upstream.
Commit 974cc7b93441 ("mfd: vexpress: Define the device as MFD cells") removed the return value check from the call to gpiochip_add_data() (or rather gpiochip_add() back then and later converted to devres) with no explanation. This function however can still fail, so check the return value and bail-out if it does.
Cc: stable@vger.kernel.org Fixes: 974cc7b93441 ("mfd: vexpress: Define the device as MFD cells") Signed-off-by: Bartosz Golaszewski bartosz.golaszewski@linaro.org Reviewed-by: Linus Walleij linus.walleij@linaro.org Link: https://lore.kernel.org/r/20250811-gpio-mmio-mfd-conv-v1-1-68c5c958cf80@lina... Signed-off-by: Lee Jones lee@kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/mfd/vexpress-sysreg.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-)
--- a/drivers/mfd/vexpress-sysreg.c +++ b/drivers/mfd/vexpress-sysreg.c @@ -90,6 +90,7 @@ static int vexpress_sysreg_probe(struct struct resource *mem; void __iomem *base; struct gpio_chip *mmc_gpio_chip; + int ret;
mem = platform_get_resource(pdev, IORESOURCE_MEM, 0); if (!mem) @@ -110,7 +111,10 @@ static int vexpress_sysreg_probe(struct bgpio_init(mmc_gpio_chip, &pdev->dev, 0x4, base + SYS_MCI, NULL, NULL, NULL, NULL, 0); mmc_gpio_chip->ngpio = 2; - devm_gpiochip_add_data(&pdev->dev, mmc_gpio_chip, NULL); + + ret = devm_gpiochip_add_data(&pdev->dev, mmc_gpio_chip, NULL); + if (ret) + return ret;
return devm_mfd_add_devices(&pdev->dev, PLATFORM_DEVID_AUTO, vexpress_sysreg_cells,