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drm/v3d: fix copy_from_user() error codes 

The copy_to/from_user() function returns the number of bytes remaining
to be copied, but we want to return -EFAULT on error.

Fixes: e4165ae830 ("drm/v3d: add multiple syncobjs support")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Reviewed-by: Melissa Wen <mwen@igalia.com>
Signed-off-by: Melissa Wen <melissa.srw@gmail.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20211011123303.GA14314@kili
This commit is contained in:
Dan Carpenter 2021-10-11 15:33:03 +03:00 committed by Melissa Wen
parent f85d9e59f1
commit ee30840ba3
1 changed files with 6 additions and 7 deletions
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13
drivers/gpu/drm/v3d/v3d_gem.c
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@ -487,8 +487,8 @@ v3d_job_init(struct v3d_dev *v3d, struct drm_file *file_priv,
for (i = 0; i < se->in_sync_count; i++) {
struct drm_v3d_sem in;
ret = copy_from_user(&in, handle++, sizeof(in));
if (ret) {
if (copy_from_user(&in, handle++, sizeof(in))) {
ret = -EFAULT;
DRM_DEBUG("Failed to copy wait dep handle.\n");
goto fail_deps;
}
@ -609,8 +609,8 @@ v3d_get_multisync_post_deps(struct drm_file *file_priv,
for (i = 0; i < count; i++) {
struct drm_v3d_sem out;
ret = copy_from_user(&out, post_deps++, sizeof(out));
if (ret) {
if (copy_from_user(&out, post_deps++, sizeof(out))) {
ret = -EFAULT;
DRM_DEBUG("Failed to copy post dep handles\n");
goto fail;
}
@ -646,9 +646,8 @@ v3d_get_multisync_submit_deps(struct drm_file *file_priv,
struct v3d_submit_ext *se = data;
int ret;
ret = copy_from_user(&multisync, ext, sizeof(multisync));
if (ret)
return ret;
if (copy_from_user(&multisync, ext, sizeof(multisync)))
return -EFAULT;
if (multisync.pad)
return -EINVAL;