[PATCH 5.16 0332/1039] mmc: meson-mx-sdhc: add IRQ check

[Greg Kroah-Hartman]

From: Sergey Shtylyov <s.shtylyov@xxxxxx>

[ Upstream commit 77bed755e0f06135faccdd3948863703f9a6e640 ]

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: e4bf1b0970ef ("mmc: host: meson-mx-sdhc: new driver for the Amlogic Meson SDHC host")
Signed-off-by: Sergey Shtylyov <s.shtylyov@xxxxxx>
Reviewed-by: Martin Blumenstingl <martin.blumenstingl@xxxxxxxxxxxxxx>
Link: https://lore.kernel.org/r/20211217202717.10041-2-s.shtylyov@xxxxxx
Signed-off-by: Ulf Hansson <ulf.hansson@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
 drivers/mmc/host/meson-mx-sdhc-mmc.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/mmc/host/meson-mx-sdhc-mmc.c b/drivers/mmc/host/meson-mx-sdhc-mmc.c
index 8fdd0bbbfa21f..28aa78aa08f3f 100644
--- a/drivers/mmc/host/meson-mx-sdhc-mmc.c
+++ b/drivers/mmc/host/meson-mx-sdhc-mmc.c
@@ -854,6 +854,11 @@ static int meson_mx_sdhc_probe(struct platform_device *pdev)
 		goto err_disable_pclk;
 
 	irq = platform_get_irq(pdev, 0);
+	if (irq < 0) {
+		ret = irq;
+		goto err_disable_pclk;
+	}
+
 	ret = devm_request_threaded_irq(dev, irq, meson_mx_sdhc_irq,
 					meson_mx_sdhc_irq_thread, IRQF_ONESHOT,
 					NULL, host);
-- 
2.34.1