From eb4ec68acf5ebb312d29840287e465d3d414b07e Mon Sep 17 00:00:00 2001 From: Deepak Date: Tue, 13 Sep 2016 12:43:04 +0530 Subject: [PATCH] driver: base: pinctrl: return error from pinctrl_bind_pins() 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 [Rewrote to be cleaner] Signed-off-by: Linus Walleij --- drivers/base/pinctrl.c | 12 ++++++++---- 1 file changed, 8 insertions(+), 4 deletions(-) diff --git a/drivers/base/pinctrl.c b/drivers/base/pinctrl.c index 076297592754..5917b4b5fb99 100644 --- a/drivers/base/pinctrl.c +++ b/drivers/base/pinctrl.c @@ -91,9 +91,13 @@ cleanup_alloc: devm_kfree(dev, dev->pins); dev->pins = NULL; - /* Only return deferrals */ - if (ret != -EPROBE_DEFER) - ret = 0; + /* Return deferrals */ + if (ret == -EPROBE_DEFER) + return ret; + /* Return serious errors */ + if (ret == -EINVAL) + return ret; + /* We ignore errors like -ENOENT meaning no pinctrl state */ - return ret; + return 0; } -- 2.20.1