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hwspinlock: Fix incorrect return pointers 

The commit 4f1acd758b ("hwspinlock: Add devm_xxx() APIs to request/free
hwlock") introduces one bug, that will return one error pointer if failed
to request one hwlock, but we expect NULL pointer on error for consumers.
This patch will fix this issue.

Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Baolin Wang <baolin.wang@linaro.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
hifive-unleashed-5.1
Baolin Wang 2018-06-28 10:32:21 +08:00 committed by Bjorn Andersson
parent c8d0498967
commit ddb34f480d
1 changed files with 4 additions and 4 deletions
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8
drivers/hwspinlock/hwspinlock_core.c
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@ -877,10 +877,10 @@ struct hwspinlock *devm_hwspin_lock_request(struct device *dev)
ptr = devres_alloc(devm_hwspin_lock_release, sizeof(*ptr), GFP_KERNEL);
if (!ptr)
return ERR_PTR(-ENOMEM);
return NULL;
hwlock = hwspin_lock_request();
if (!IS_ERR(hwlock)) {
if (hwlock) {
*ptr = hwlock;
devres_add(dev, ptr);
} else {
@ -913,10 +913,10 @@ struct hwspinlock *devm_hwspin_lock_request_specific(struct device *dev,
ptr = devres_alloc(devm_hwspin_lock_release, sizeof(*ptr), GFP_KERNEL);
if (!ptr)
return ERR_PTR(-ENOMEM);
return NULL;
hwlock = hwspin_lock_request_specific(id);
if (!IS_ERR(hwlock)) {
if (hwlock) {
*ptr = hwlock;
devres_add(dev, ptr);
} else {