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pwm: lp3943: Fix potential memory leak during request 

Fix a memory leak in the lp3943_pwm_request_map() error handling path.
Make sure already allocated pwm map memory is freed correctly.
Detected by Coverity: CID 1162829.

Signed-off-by: Christian Engelmayer <cengelma@gmx.at>
Acked-by: Milo Kim <milo.kim@ti.com>
Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
This commit is contained in:
Christian Engelmayer 2014-01-23 22:32:20 +01:00 committed by Thierry Reding
parent 38dbfb59d1
commit 0b7d25c347
1 changed files with 3 additions and 1 deletions
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4
drivers/pwm/pwm-lp3943.c
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@ -52,8 +52,10 @@ lp3943_pwm_request_map(struct lp3943_pwm *lp3943_pwm, int hwpwm)
offset = pwm_map->output[i];
/* Return an error if the pin is already assigned */
if (test_and_set_bit(offset, &lp3943->pin_used))
if (test_and_set_bit(offset, &lp3943->pin_used)) {
kfree(pwm_map);
return ERR_PTR(-EBUSY);
}
}
return pwm_map;