Re: [PATCH 3.10 25/50] gpiolib: of: Correct error handling in of_get_named_gpiod_flags

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On Sun, Jan 25, 2015 at 04:29:26PM -0800, Guenter Roeck wrote:
> On 01/25/2015 02:05 PM, Greg Kroah-Hartman wrote:
> >On Sun, Jan 25, 2015 at 01:31:49PM -0800, Guenter Roeck wrote:
> >>On Sun, Jan 25, 2015 at 10:07:15AM -0800, Greg Kroah-Hartman wrote:
> >>>3.10-stable review patch.  If anyone has any objections, please let me know.
> >>>
> >>>------------------
> >>>
> >>>From: Hans Holmberg <hans.holmberg@xxxxxxxxx>
> >>>
> >>>commit 7b8792bbdffdff3abda704f89c6a45ea97afdc62 upstream.
> >>>
> >>>of_get_named_gpiod_flags fails with -EPROBE_DEFER in cases
> >>>where the gpio chip is available and the GPIO translation fails.
> >>>
> >>>This causes drivers to be re-probed erroneusly, and hides the
> >>>real problem(i.e. the GPIO number being out of range).
> >>>
> >>>Signed-off-by: Hans Holmberg <hans.holmberg@xxxxxxxxx>
> >>>Reviewed-by: Alexandre Courbot <acourbot@xxxxxxxxxx>
> >>>Signed-off-by: Linus Walleij <linus.walleij@xxxxxxxxxx>
> >>>Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
> >>>
> >>
> >>This patch is causing several build failures.
> >>
> >>Error log:
> >>drivers/gpio/gpiolib-of.c: In function 'of_gpiochip_find_and_xlate':
> >>drivers/gpio/gpiolib-of.c:50:3: error: implicit declaration of function 'ERR_PTR'
> >>
> >>since "#include <linux/err.h>" is missing in drivers/gpio/gpiolib-of.c
> >>in the 3.10 kernel.
> >
> >Thanks for letting me know, I've pushed out a fix for this in the quilt
> >tree of patches.
> >
> 
> Confirmed; build and qemu tests now pass with no errors.

Wonderful, thanks for letting me know.

greg k-h
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