Commit 5e63e6ba authored by Sergei Shtylyov's avatar Sergei Shtylyov Committed by Marc Kleine-Budde

can: rcar_can: fix IRQ check

rcar_can_probe() regards 0 as a wrong IRQ #, despite platform_get_irq() that it
calls returns negative error code in that case. This leads to the following
being printed to the console when attempting to open the device:

error requesting interrupt fffffffa

because  rcar_can_open() calls request_irq() with a negative IRQ #, and that
function naturally fails with -EINVAL.

Check for the negative error codes instead and propagate them upstream instead
of just returning -ENODEV.

Fixes: fd115931 ("can: add Renesas R-Car CAN driver")
Signed-off-by: default avatarSergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Cc: linux-stable <stable@vger.kernel.org>
Signed-off-by: default avatarMarc Kleine-Budde <mkl@pengutronix.de>
parent 2ee94014
......@@ -758,8 +758,9 @@ static int rcar_can_probe(struct platform_device *pdev)
}
irq = platform_get_irq(pdev, 0);
if (!irq) {
if (irq < 0) {
dev_err(&pdev->dev, "No IRQ resource\n");
err = irq;
goto fail;
}
......
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