Commit 40265bbe authored by Hans Verkuil's avatar Hans Verkuil Committed by Mauro Carvalho Chehab

[media] v4l2-ctrl: fix error return of copy_to/from_user

copy_to/from_user returns the number of bytes not copied, it does not
return a 'normal' linux error code.
Signed-off-by: default avatarHans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: default avatarMauro Carvalho Chehab <m.chehab@samsung.com>
parent c336f75e
......@@ -1326,7 +1326,8 @@ static int ptr_to_user(struct v4l2_ext_control *c,
u32 len;
if (ctrl->is_ptr && !ctrl->is_string)
return copy_to_user(c->ptr, ptr.p, c->size);
return copy_to_user(c->ptr, ptr.p, c->size) ?
-EFAULT : 0;
switch (ctrl->type) {
case V4L2_CTRL_TYPE_STRING:
......@@ -1336,7 +1337,7 @@ static int ptr_to_user(struct v4l2_ext_control *c,
return -ENOSPC;
}
return copy_to_user(c->string, ptr.p_char, len + 1) ?
-EFAULT : 0;
-EFAULT : 0;
case V4L2_CTRL_TYPE_INTEGER64:
c->value64 = *ptr.p_s64;
break;
......@@ -1373,7 +1374,7 @@ static int user_to_ptr(struct v4l2_ext_control *c,
if (ctrl->is_ptr && !ctrl->is_string) {
unsigned idx;
ret = copy_from_user(ptr.p, c->ptr, c->size);
ret = copy_from_user(ptr.p, c->ptr, c->size) ? -EFAULT : 0;
if (ret || !ctrl->is_array)
return ret;
for (idx = c->size / ctrl->elem_size; idx < ctrl->elems; idx++)
......@@ -1391,7 +1392,7 @@ static int user_to_ptr(struct v4l2_ext_control *c,
return -ERANGE;
if (size > ctrl->maximum + 1)
size = ctrl->maximum + 1;
ret = copy_from_user(ptr.p_char, c->string, size);
ret = copy_from_user(ptr.p_char, c->string, size) ? -EFAULT : 0;
if (!ret) {
char last = ptr.p_char[size - 1];
......@@ -1401,7 +1402,7 @@ static int user_to_ptr(struct v4l2_ext_control *c,
if (strlen(ptr.p_char) == ctrl->maximum && last)
return -ERANGE;
}
return ret ? -EFAULT : 0;
return ret;
default:
*ptr.p_s32 = c->value;
break;
......
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