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usb: dwc3: of-simple: fix missing clk_disable_unprepare 

[ Upstream commit ded600ea9f ]

If of_clk_get() fails, the clean-up of already initialized clocks should be
the same as when clk_prepare_enable() fails. Thus a clk_disable_unprepare()
for each clock should be called before the clk_put().

Found by Linux Driver Verification project (linuxtesting.org).

Fixes: 16adc674d0 ("usb: dwc3: ep0: fix setup_packet_pending initialization")

Signed-off-by: Andreas Platschek <andreas.platschek@opentech.at>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Signed-off-by: Sasha Levin <alexander.levin@verizon.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
pull/10/head
Andreas Platschek 2017-12-07 11:32:20 +01:00 committed by Greg Kroah-Hartman
parent 98b35258b3
commit abe8e59ab2
1 changed files with 3 additions and 1 deletions
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4
drivers/usb/dwc3/dwc3-of-simple.c
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@ -57,8 +57,10 @@ static int dwc3_of_simple_clk_init(struct dwc3_of_simple *simple, int count)
clk = of_clk_get(np, i);
if (IS_ERR(clk)) {
while (--i >= 0)
while (--i >= 0) {
clk_disable_unprepare(simple->clks[i]);
clk_put(simple->clks[i]);
}
return PTR_ERR(clk);
}