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tty: serial: sprd: fix error return code in sprd_probe() 

platform_get_irq() returns an error code, but the sprd_serial driver
ignores it and always returns -ENODEV. This is not correct and,
prevents -EPROBE_DEFER from being propagated properly.

Also, notice that platform_get_irq() no longer returns 0 on error:
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=e330b9a6bb35dc7097a4f02cb1ae7b6f96df92af

Print and propagate the return value of platform_get_irq on failure.

This issue was detected with the help of Coccinelle.

Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
hifive-unleashed-5.1
Gustavo A. R. Silva 2017-08-08 17:42:46 -05:00 committed by Greg Kroah-Hartman
parent 921469f7fb
commit ec085c5a51
1 changed files with 2 additions and 2 deletions
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4
drivers/tty/serial/sprd_serial.c
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@ -731,8 +731,8 @@ static int sprd_probe(struct platform_device *pdev)
irq = platform_get_irq(pdev, 0);
if (irq < 0) {
dev_err(&pdev->dev, "not provide irq resource\n");
return -ENODEV;
dev_err(&pdev->dev, "not provide irq resource: %d\n", irq);
return irq;
}
up->irq = irq;