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@xxxxxxxxxx> --- 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 -- To unsubscribe from this list: send the line "unsubscribe linux-gpio" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html