If pin_free is called on a pin already freed, mux_usecount is set to
UINT_MAX which is really a bad idea.
This will silently ignore a double call to pin_free
Signed-off-by: Richard Genoud <richard.gen...@gmail.com>
---
drivers/pinctrl/pinmux.c | 5 +++--
1 files changed, 3 insertions(+), 2 deletions(-)
diff --git a/drivers/pinctrl/pinmux.c b/drivers/pinctrl/pinmux.c
index 917e830..9fd55f9 100644
--- a/drivers/pinctrl/pinmux.c
+++ b/drivers/pinctrl/pinmux.c
@@ -194,8 +194,9 @@ static const char *pin_free(struct pinctrl_dev *pctldev,
int pin,
}
if (!gpio_range) {
- desc->mux_usecount--;
- if (desc->mux_usecount)
+ if (1 == desc->mux_usecount)
+ desc->mux_usecount = 0;
+ else
return NULL;
}
--
1.7.2.5
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