6.15-stable review patch. If anyone has any objections, please let me know.
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From: Lifeng Zheng zhenglifeng1@huawei.com
[ Upstream commit bab7834c03820eb11269bc48f07c3800192460d2 ]
Commit 96ffcdf239de ("PM / devfreq: Remove redundant governor_name from struct devfreq") removes governor_name and uses governor->name to replace it. But devfreq->governor may be NULL and directly using devfreq->governor->name may cause null pointer exception. Move the check of governor to before using governor->name.
Fixes: 96ffcdf239de ("PM / devfreq: Remove redundant governor_name from struct devfreq") Signed-off-by: Lifeng Zheng zhenglifeng1@huawei.com Link: https://lore.kernel.org/lkml/20250421030020.3108405-5-zhenglifeng1@huawei.co... Signed-off-by: Chanwoo Choi cw00.choi@samsung.com Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/devfreq/devfreq.c | 10 +++------- 1 file changed, 3 insertions(+), 7 deletions(-)
diff --git a/drivers/devfreq/devfreq.c b/drivers/devfreq/devfreq.c index 98657d3b9435..713e6e52cca1 100644 --- a/drivers/devfreq/devfreq.c +++ b/drivers/devfreq/devfreq.c @@ -1382,15 +1382,11 @@ int devfreq_remove_governor(struct devfreq_governor *governor) int ret; struct device *dev = devfreq->dev.parent;
+ if (!devfreq->governor) + continue; + if (!strncmp(devfreq->governor->name, governor->name, DEVFREQ_NAME_LEN)) { - /* we should have a devfreq governor! */ - if (!devfreq->governor) { - dev_warn(dev, "%s: Governor %s NOT present\n", - __func__, governor->name); - continue; - /* Fall through */ - } ret = devfreq->governor->event_handler(devfreq, DEVFREQ_GOV_STOP, NULL); if (ret) {