linux-kernel - [PATCH] usb: dwc3: of-simple: Fix warning during unbind

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Date:   Fri, 9 Sep 2016 18:58:37 +0530
From:   Anurag Kumar Vulisha <anurag.kumar.vulisha@...inx.com>
To:     Felipe Balbi <balbi@...nel.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>
CC:     <linux-usb@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <punnaia@...inx.com>, <sgoud@...inx.com>,
        <michal.simek@...inx.com>, <anirudh@...inx.com>,
        Anurag Kumar Vulisha <anuragku@...inx.com>
Subject: [PATCH] usb: dwc3: of-simple: Fix warning during unbind

In dwc3_of_simple_remove() we are using clk_unprepare() before doing
any clk_disable(). If we enable Common CLK framework (CCF) and try to
unbind dwc3-of-simple driver, we see kernel WARN messages.

This patch fixes this kernel warning by using clk_disable_unprepare()
instead of clk_unprepare().

Signed-off-by: Anurag Kumar Vulisha <anuragku@...inx.com>
---
 drivers/usb/dwc3/dwc3-of-simple.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/usb/dwc3/dwc3-of-simple.c b/drivers/usb/dwc3/dwc3-of-simple.c
index e56d59b..99d8016 100644
--- a/drivers/usb/dwc3/dwc3-of-simple.c
+++ b/drivers/usb/dwc3/dwc3-of-simple.c
@@ -112,7 +112,7 @@ static int dwc3_of_simple_remove(struct platform_device *pdev)
 	int			i;
 
 	for (i = 0; i < simple->num_clocks; i++) {
-		clk_unprepare(simple->clks[i]);
+		clk_disable_unprepare(simple->clks[i]);
 		clk_put(simple->clks[i]);
 	}
 
-- 
2.1.1