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authorSonic Zhang <sonic.zhang@analog.com>2013-08-14 09:26:43 +0400
committerLinus Walleij <linus.walleij@linaro.org>2013-08-14 19:52:18 +0400
commit744f0a9adb6a3478c9753eef56b0614ee69f969e (patch)
treeae17d4292ff680c8753e38231c2ebcf1d47db3f0 /drivers/pinctrl/pinmux.c
parentbf4dae5ce1b95a5932e43036edcf3f1b324758c6 (diff)
downloadlinux-744f0a9adb6a3478c9753eef56b0614ee69f969e.tar.xz
pinctrl: pinmux: Don't free pins requested by other devices in pinmux_disable_setting.
One peripheral may share part of its pins with the 2nd peripheral and the other pins with the 3rd. If it requests all pins when part of them has already be requested and owned by the 2nd peripheral, this request fails and pinmux_disable_setting() is called. The pinmux_disable_setting() frees all pins of the first peripheral without checking if the pin is owned by itself or the 2nd, which results in the malfunction of the 2nd peripheral driver. Signed-off-by: Sonic Zhang <sonic.zhang@analog.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Diffstat (limited to 'drivers/pinctrl/pinmux.c')
-rw-r--r--drivers/pinctrl/pinmux.c10
1 files changed, 5 insertions, 5 deletions
diff --git a/drivers/pinctrl/pinmux.c b/drivers/pinctrl/pinmux.c
index 88cc5095d0c9..5f5158856ea9 100644
--- a/drivers/pinctrl/pinmux.c
+++ b/drivers/pinctrl/pinmux.c
@@ -482,13 +482,13 @@ void pinmux_disable_setting(struct pinctrl_setting const *setting)
pins[i]);
continue;
}
- desc->mux_setting = NULL;
+ if (desc->mux_setting == &(setting->data.mux)) {
+ desc->mux_setting = NULL;
+ /* And release the pin */
+ pin_free(pctldev, pins[i], NULL);
+ }
}
- /* And release the pins */
- for (i = 0; i < num_pins; i++)
- pin_free(pctldev, pins[i], NULL);
-
if (ops->disable)
ops->disable(pctldev, setting->data.mux.func, setting->data.mux.group);
}