[PATCH 5.4 094/320] mmc: meson-mx-sdio: add IRQ check

Greg Kroah-Hartman
2022-01-24T19:38:43Z

From: Sergey Shtylyov <s.shtylyov@omp.ru>

[ Upstream commit 8fc9a77bc64e1f23d07953439817d8402ac9706f ]

The driver neglects to check the result of platform_get_irq()'s call and
blithely passes the negative error codes to devm_request_threaded_irq()
(which takes *unsigned* IRQ #), causing it to fail with -EINVAL, overriding
an original error code. Stop calling devm_request_threaded_irq() with the
invalid IRQ #s.

Fixes: ed80a13bb4c4 ("mmc: meson-mx-sdio: Add a driver for the Amlogic Meson8 and Meson8b SoC")
Signed-off-by: Sergey Shtylyov <s.shtylyov@omp.ru>
Reviewed-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Link: https://lore.kernel.org/r/20211217202717.10041-3-s.shtylyov@omp.ru
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/mmc/host/meson-mx-sdio.c | 5 +++++
1 file changed, 5 insertions(+)

diff --git a/drivers/mmc/host/meson-mx-sdio.c b/drivers/mmc/host/meson-mx-sdio.c
index 360d523132bd5..780552a86ec08 100644
--- a/drivers/mmc/host/meson-mx-sdio.c
+++ b/drivers/mmc/host/meson-mx-sdio.c
@@ -665,6 +665,11 @@ static int meson_mx_mmc_probe(struct platform_device *pdev)
}

irq = platform_get_irq(pdev, 0);
+ if (irq < 0) {
+ ret = irq;
+ goto error_free_mmc;
+ }
+
ret = devm_request_threaded_irq(host->controller_dev, irq,
meson_mx_mmc_irq,
meson_mx_mmc_irq_thread, IRQF_ONESHOT,
--
2.34.1