[PATCH] gpiolib: do not print err message for EPROBE_DEFER

[Grygorii Strashko]

The gpiochip may have dependencies from pinmux and so got deferred. Now it
will print error message every time -EPROBE_DEFER is returned which is
unnecessary:

"gpiochip_add_data_with_key: GPIOs 0..31 (gpio-0-31) failed to register, -517"

Hence, do suppress error message for -EPROBE_DEFER case.

Signed-off-by: Grygorii Strashko <grygorii.stras...@ti.com>
---
 drivers/gpio/gpiolib.c | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/drivers/gpio/gpiolib.c b/drivers/gpio/gpiolib.c
index 089ddcaa9bc6..fd2c503a6aab 100644
--- a/drivers/gpio/gpiolib.c
+++ b/drivers/gpio/gpiolib.c
@@ -771,9 +771,11 @@ int gpiochip_add_data_with_key(struct gpio_chip *gc, void 
*data,
        ida_free(&gpio_ida, gdev->id);
 err_free_gdev:
        /* failures here can mean systems won't boot... */
-       pr_err("%s: GPIOs %d..%d (%s) failed to register, %d\n", __func__,
-              gdev->base, gdev->base + gdev->ngpio - 1,
-              gc->label ? : "generic", ret);
+       if (ret != -EPROBE_DEFER) {
+               pr_err("%s: GPIOs %d..%d (%s) failed to register, %d\n", 
__func__,
+                      gdev->base, gdev->base + gdev->ngpio - 1,
+                      gc->label ? : "generic", ret);
+       }
        kfree(gdev);
        return ret;
 }
-- 
2.17.1