diff options
| author | Laurent Pinchart <laurent.pinchart@ideasonboard.com> | 2014-01-29 10:07:13 -0300 |
|---|---|---|
| committer | Mauro Carvalho Chehab <m.chehab@samsung.com> | 2014-05-25 12:48:33 -0300 |
| commit | f2e9084779d3ad3b51ee45a3a53fead3f16516ca (patch) | |
| tree | 79dc867b483e692582d373e41e5840adf602f1eb | |
| parent | 9cfd65e80959836fed78704e8a127d4e10448d56 (diff) | |
| download | lwn-f2e9084779d3ad3b51ee45a3a53fead3f16516ca.tar.gz lwn-f2e9084779d3ad3b51ee45a3a53fead3f16516ca.zip | |
[media] v4l: Validate fields in the core code for subdev EDID ioctls
The subdev EDID ioctls receive a pad field that must reference an
existing pad and an EDID field that must point to a buffer. Validate
both fields in the core code instead of duplicating validation in all
drivers.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Acked-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Reviewed-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
| -rw-r--r-- | drivers/media/i2c/ad9389b.c | 2 | ||||
| -rw-r--r-- | drivers/media/i2c/adv7511.c | 2 | ||||
| -rw-r--r-- | drivers/media/i2c/adv7604.c | 4 | ||||
| -rw-r--r-- | drivers/media/i2c/adv7842.c | 4 | ||||
| -rw-r--r-- | drivers/media/v4l2-core/v4l2-subdev.c | 24 |
5 files changed, 20 insertions, 16 deletions
diff --git a/drivers/media/i2c/ad9389b.c b/drivers/media/i2c/ad9389b.c index f00b3dd2b457..fada17566205 100644 --- a/drivers/media/i2c/ad9389b.c +++ b/drivers/media/i2c/ad9389b.c @@ -682,8 +682,6 @@ static int ad9389b_get_edid(struct v4l2_subdev *sd, struct v4l2_edid *edid) return -EINVAL; if (edid->blocks == 0 || edid->blocks > 256) return -EINVAL; - if (!edid->edid) - return -EINVAL; if (!state->edid.segments) { v4l2_dbg(1, debug, sd, "EDID segment 0 not found\n"); return -ENODATA; diff --git a/drivers/media/i2c/adv7511.c b/drivers/media/i2c/adv7511.c index d77a1db4f94d..f98acf4aafd4 100644 --- a/drivers/media/i2c/adv7511.c +++ b/drivers/media/i2c/adv7511.c @@ -783,8 +783,6 @@ static int adv7511_get_edid(struct v4l2_subdev *sd, struct v4l2_edid *edid) return -EINVAL; if ((edid->blocks == 0) || (edid->blocks > 256)) return -EINVAL; - if (!edid->edid) - return -EINVAL; if (!state->edid.segments) { v4l2_dbg(1, debug, sd, "EDID segment 0 not found\n"); return -ENODATA; diff --git a/drivers/media/i2c/adv7604.c b/drivers/media/i2c/adv7604.c index 98cc5407f1b1..338baa4c23ef 100644 --- a/drivers/media/i2c/adv7604.c +++ b/drivers/media/i2c/adv7604.c @@ -1673,8 +1673,6 @@ static int adv7604_get_edid(struct v4l2_subdev *sd, struct v4l2_edid *edid) return -EINVAL; if (edid->start_block == 1) edid->blocks = 1; - if (!edid->edid) - return -EINVAL; if (edid->blocks > state->edid.blocks) edid->blocks = state->edid.blocks; @@ -1761,8 +1759,6 @@ static int adv7604_set_edid(struct v4l2_subdev *sd, struct v4l2_edid *edid) edid->blocks = 2; return -E2BIG; } - if (!edid->edid) - return -EINVAL; v4l2_dbg(2, debug, sd, "%s: write EDID pad %d, edid.present = 0x%x\n", __func__, edid->pad, state->edid.present); diff --git a/drivers/media/i2c/adv7842.c b/drivers/media/i2c/adv7842.c index d85e125aa8d8..0d554919cdd5 100644 --- a/drivers/media/i2c/adv7842.c +++ b/drivers/media/i2c/adv7842.c @@ -2036,8 +2036,6 @@ static int adv7842_get_edid(struct v4l2_subdev *sd, struct v4l2_edid *edid) return -EINVAL; if (edid->start_block == 1) edid->blocks = 1; - if (!edid->edid) - return -EINVAL; switch (edid->pad) { case ADV7842_EDID_PORT_A: @@ -2072,8 +2070,6 @@ static int adv7842_set_edid(struct v4l2_subdev *sd, struct v4l2_edid *e) return -EINVAL; if (e->blocks > 2) return -E2BIG; - if (!e->edid) - return -EINVAL; /* todo, per edid */ state->aspect_ratio = v4l2_calc_aspect_ratio(e->edid[0x15], diff --git a/drivers/media/v4l2-core/v4l2-subdev.c b/drivers/media/v4l2-core/v4l2-subdev.c index db126dbc19c9..058c1a6e8392 100644 --- a/drivers/media/v4l2-core/v4l2-subdev.c +++ b/drivers/media/v4l2-core/v4l2-subdev.c @@ -361,11 +361,27 @@ static long subdev_do_ioctl(struct file *file, unsigned int cmd, void *arg) sd, pad, set_selection, subdev_fh, sel); } - case VIDIOC_G_EDID: - return v4l2_subdev_call(sd, pad, get_edid, arg); + case VIDIOC_G_EDID: { + struct v4l2_subdev_edid *edid = arg; - case VIDIOC_S_EDID: - return v4l2_subdev_call(sd, pad, set_edid, arg); + if (edid->pad >= sd->entity.num_pads) + return -EINVAL; + if (edid->blocks && edid->edid == NULL) + return -EINVAL; + + return v4l2_subdev_call(sd, pad, get_edid, edid); + } + + case VIDIOC_S_EDID: { + struct v4l2_subdev_edid *edid = arg; + + if (edid->pad >= sd->entity.num_pads) + return -EINVAL; + if (edid->blocks && edid->edid == NULL) + return -EINVAL; + + return v4l2_subdev_call(sd, pad, set_edid, edid); + } case VIDIOC_SUBDEV_DV_TIMINGS_CAP: { struct v4l2_dv_timings_cap *cap = arg; |