Re: [PATCH] gpiolib: don't compare an unsigned for >= 0

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On 31.08.2015 06:44, Alexandre Courbot wrote:
On Sun, Aug 30, 2015 at 2:13 PM, Dirk Behme <dirk.behme@xxxxxxxxx> wrote:
On 18.08.2015 18:02, Dirk Behme wrote:

The parameter offset is an unsigned, so it makes no sense to compare
it for >= 0. Fix the compiler warning regarding this by removing this
comparison.

As the macro GPIO_OFFSET_VALID is only used at this single place, simplify
the code by dropping the macro completely and dropping the invert, too.

No functional change.

Signed-off-by: Dirk Behme <dirk.behme@xxxxxxxxx>
---
   drivers/gpio/gpiolib.c | 4 +---
   1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/drivers/gpio/gpiolib.c b/drivers/gpio/gpiolib.c
index bf4bd1d..9841b05 100644
--- a/drivers/gpio/gpiolib.c
+++ b/drivers/gpio/gpiolib.c
@@ -47,8 +47,6 @@
    */
   DEFINE_SPINLOCK(gpio_lock);

-#define GPIO_OFFSET_VALID(chip, offset) (offset >= 0 && offset <
chip->ngpio)
-
   static DEFINE_MUTEX(gpio_lookup_lock);
   static LIST_HEAD(gpio_lookup_list);
   LIST_HEAD(gpio_chips);
@@ -914,7 +912,7 @@ const char *gpiochip_is_requested(struct gpio_chip
*chip, unsigned offset)
   {
         struct gpio_desc *desc;

-       if (!GPIO_OFFSET_VALID(chip, offset))
+       if (offset >= chip->ngpio)
                 return NULL;

         desc = &chip->desc[offset];



What do you think about this? Could this be applied?

Looks good to me.

Acked-by: Alexandre Courbot <acourbot@xxxxxxxxxx>


Ping, could this be applied, then?

Best regards

Dirk

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