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[media] media: v4l2-ctrls: Fix 64bit support in get_ctrl() 

When trying to use v4l2_ctrl_g_ctrl_int64() to retrieve a
V4L2_CTRL_TYPE_INTEGER64 type value the internal helper function
get_ctrl() would prematurely exit because for this control type
the 'is_int' flag is not set. This would result in v4l2_ctrl_g_ctrl_int64
always returning 0.

Also v4l2_ctrl_g_ctrl_int64() is reading and returning the 32bit value
member instead of the 64bit version, so fixing that as well.

This patch extends the condition check to allow the V4L2_CTRL_TYPE_INTEGER64
type to continue processing instead of exiting.

Signed-off-by: Benoit Parrot <bparrot@ti.com>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Cc: <stable@vger.kernel.org>      # for v3.17 and up
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
This commit is contained in:
Benoit Parrot 2015-09-21 13:03:21 -03:00 committed by Mauro Carvalho Chehab
parent d275d93590
commit a807773405
1 changed files with 3 additions and 3 deletions
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6
drivers/media/v4l2-core/v4l2-ctrls.c
View File

@ -2884,7 +2884,7 @@ static int get_ctrl(struct v4l2_ctrl *ctrl, struct v4l2_ext_control *c)
* cur_to_user() calls below would need to be modified not to access
* userspace memory when called from get_ctrl().
*/
if (!ctrl->is_int)
if (!ctrl->is_int && ctrl->type != V4L2_CTRL_TYPE_INTEGER64)
return -EINVAL;
if (ctrl->flags & V4L2_CTRL_FLAG_WRITE_ONLY)
@ -2942,9 +2942,9 @@ s64 v4l2_ctrl_g_ctrl_int64(struct v4l2_ctrl *ctrl)
/* It's a driver bug if this happens. */
WARN_ON(ctrl->is_ptr || ctrl->type != V4L2_CTRL_TYPE_INTEGER64);
c.value = 0;
c.value64 = 0;
get_ctrl(ctrl, &c);
return c.value;
return c.value64;
}
EXPORT_SYMBOL(v4l2_ctrl_g_ctrl_int64);