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authorSergei Shtylyov <sergei.shtylyov@cogentembedded.com>2015-06-20 03:32:46 +0300
committerMarc Kleine-Budde <mkl@pengutronix.de>2015-07-12 20:57:41 +0200
commit5e63e6baa159fa8c787cf783dbf3d77fbea97331 (patch)
tree8406c8f34f1abf9d89ec785a3d3c88df234fbb3e /drivers/net
parent2ee94014d9bd3868b1c0d17405f96d63bec83f28 (diff)
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: fd1159318e55 ("can: add Renesas R-Car CAN driver") Signed-off-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com> Cc: linux-stable <stable@vger.kernel.org> Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Diffstat (limited to 'drivers/net')
-rw-r--r--drivers/net/can/rcar_can.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/net/can/rcar_can.c b/drivers/net/can/rcar_can.c
index 7deb80dcbe8c..93017c09cfc3 100644
--- a/drivers/net/can/rcar_can.c
+++ b/drivers/net/can/rcar_can.c
@@ -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;
}