tty: serial: sprd: fix error return code in sprd_probe()
authorGustavo A. R. Silva <gustavo@embeddedor.com>
Tue, 8 Aug 2017 22:42:46 +0000 (17:42 -0500)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Mon, 28 Aug 2017 18:51:19 +0000 (20:51 +0200)
commitec085c5a51b768947ca481f90b66653e36b3c566
tree616af70c3c5610de9cb4ef6883d8c2f674081a7f
parent921469f7fb972f7c6146a6a82693bd45b3beec21
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>
drivers/tty/serial/sprd_serial.c