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[4.14,212/323] i2c: emev2: add IRQ check

Message ID 20210520092127.403224271@linuxfoundation.org
State New
Headers show
Series None | expand

Commit Message

Greg Kroah-Hartman May 20, 2021, 9:21 a.m. UTC 
From: Sergey Shtylyov <s.shtylyov@omprussia.ru>

[ Upstream commit bb6129c32867baa7988f7fd2066cf18ed662d240 ]

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

Fixes: 5faf6e1f58b4 ("i2c: emev2: add driver")
Signed-off-by: Sergey Shtylyov <s.shtylyov@omprussia.ru>
Signed-off-by: Wolfram Sang <wsa@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/i2c/busses/i2c-emev2.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)
diff mbox series

Patch

diff --git a/drivers/i2c/busses/i2c-emev2.c b/drivers/i2c/busses/i2c-emev2.c
index dd97e5d9f49a..74f0d5f2dc30 100644
--- a/drivers/i2c/busses/i2c-emev2.c
+++ b/drivers/i2c/busses/i2c-emev2.c
@@ -400,7 +400,10 @@  static int em_i2c_probe(struct platform_device *pdev)
 
 	em_i2c_reset(&priv->adap);
 
-	priv->irq = platform_get_irq(pdev, 0);
+	ret = platform_get_irq(pdev, 0);
+	if (ret < 0)
+		goto err_clk;
+	priv->irq = ret;
 	ret = devm_request_irq(&pdev->dev, priv->irq, em_i2c_irq_handler, 0,
 				"em_i2c", priv);
 	if (ret)