From 3778724bec53a3585cde6aed8c75ae3f085c3dcb Mon Sep 17 00:00:00 2001 From: Markus Elfring Date: Sat, 15 Apr 2023 21:06:06 +0200 Subject: [PATCH] drm/nouveau/debugfs: Move an expression into a function call parameter in nouveau_debugfs_pstate_set() MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit The address of a data structure member was determined before a corresponding null pointer check in the implementation of the function “nouveau_debugfs_pstate_set”. Thus avoid the risk for undefined behaviour by moving the usage of an expression into a parameter for a function call at the end. This issue was detected by using the Coccinelle software. Signed-off-by: Markus Elfring Reviewed-by: Karol Herbst Signed-off-by: Karol Herbst Link: https://patchwork.freedesktop.org/patch/msgid/1903e057-57d3-e12e-da37-008e23afd2e2@web.de --- drivers/gpu/drm/nouveau/nouveau_debugfs.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/drm/nouveau/nouveau_debugfs.c b/drivers/gpu/drm/nouveau/nouveau_debugfs.c index 2a36d1ca8fda..44e26b6e74c7 100644 --- a/drivers/gpu/drm/nouveau/nouveau_debugfs.c +++ b/drivers/gpu/drm/nouveau/nouveau_debugfs.c @@ -144,7 +144,6 @@ nouveau_debugfs_pstate_set(struct file *file, const char __user *ubuf, struct seq_file *m = file->private_data; struct drm_device *drm = m->private; struct nouveau_debugfs *debugfs = nouveau_debugfs(drm); - struct nvif_object *ctrl = &debugfs->ctrl; struct nvif_control_pstate_user_v0 args = { .pwrsrc = -EINVAL }; char buf[32] = {}, *tmp, *cur = buf; long value, ret; @@ -188,7 +187,8 @@ nouveau_debugfs_pstate_set(struct file *file, const char __user *ubuf, return ret; } - ret = nvif_mthd(ctrl, NVIF_CONTROL_PSTATE_USER, &args, sizeof(args)); + ret = nvif_mthd(&debugfs->ctrl, NVIF_CONTROL_PSTATE_USER, + &args, sizeof(args)); pm_runtime_put_autosuspend(drm->dev); if (ret < 0) return ret; -- 2.34.1