Messages in this thread Patch in this message | | | From | Richard Genoud <> | Subject | [PATCH] BUG: pinmux: release only taken pins on error | Date | Wed, 20 Mar 2013 12:31:51 +0100 |
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commit e38d457de7be63e6ced1ea254aa51466deb1fef0 pinctrl: pinmux: Release all taken pins in pinmux_enable_setting
Introduced a bug in the release pin mechanism. All the pins (taken or not) where released. For instance, if a i2c function has already taken pins 5 and 6. And the pins of function PHY are requested (pins 3 4 5 6 7). The pins 3 and 4 will be taken, pin 5 is already taken, so the function fails. And we have pins 3 and 4 release, which is ok. But also pins 5 and 6 !. And also pin 7 (which will have its mux_usecount to -1...)
This patch reset the original behaviour.
Signed-off-by: Richard Genoud <richard.genoud@gmail.com> --- drivers/pinctrl/pinmux.c | 2 ++ 1 files changed, 2 insertions(+), 0 deletions(-)
diff --git a/drivers/pinctrl/pinmux.c b/drivers/pinctrl/pinmux.c index 1a00658..917e830 100644 --- a/drivers/pinctrl/pinmux.c +++ b/drivers/pinctrl/pinmux.c @@ -409,6 +409,8 @@ int pinmux_enable_setting(struct pinctrl_setting const *setting) dev_err(pctldev->dev, "could not request pin %d on device %s\n", pins[i], pinctrl_dev_get_name(pctldev)); + /* On error release *only* taken pins */ + num_pins = i - 1; /* this pin just failed */ goto err_pin_request; } } -- 1.7.2.5
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