[PATCH] driver: base: pinctrl: return error from pinctrl_bind_pins()

[Deepak <deepak_das@mentor.com>]

strict pin controller returns -EINVAL in case of pin request which
is already claimed by somebody else.
Following is the sequence of calling pin_request() from
pinctrl_bind_pins():-
pinctrl_bind_pins()->pinctrl_select_state()->pinmux_enable_setting()->
pin_request()

But pinctrl_bind_pins() only returns -EPROBE_DEFER which makes device
driver probe successful even if the pin request is rejected by the pin
controller subsystem.

This commit modifies pinctrl_bind_pins() to return error if the pin is
rejected by pin control subsystem.

Signed-off-by: Deepak Das <deepak_das@mentor.com>
---
  drivers/base/pinctrl.c | 2 +-
  1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/base/pinctrl.c b/drivers/base/pinctrl.c
index 0762975..e65c1af 100644
--- a/drivers/base/pinctrl.c
+++ b/drivers/base/pinctrl.c
@@ -92,7 +92,7 @@ cleanup_alloc:
      dev->pins = NULL;

      /* Only return deferrals */
-    if (ret != -EPROBE_DEFER)
+    if ((ret != -EPROBE_DEFER) && (ret != -EINVAL))
          ret = 0;

      return ret;
-- 
1.9.1