git.openwrt.org Git - openwrt/openwrt.git/blob

   1 From ecf1a0cc8481cbfa9c118349930a58ce36605c38 Mon Sep 17 00:00:00 2001
   2 From: Dave Stevenson <dave.stevenson@raspberrypi.org>
   3 Date: Thu, 24 Jan 2019 16:40:01 +0000
   4 Subject: [PATCH] staging: bcm2835-codec: variable vb2 may be used
   5  uninitialised
   6
   7 In op_buffer_cb, the failure path checked whether there was
   8 an associated vb2 buffer before the variable vb2 had been
   9 assigned.
  10
  11 Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.org>
  12 ---
  13  .../vc04_services/bcm2835-codec/bcm2835-v4l2-codec.c        | 6 +++---
  14  1 file changed, 3 insertions(+), 3 deletions(-)
  15
  16 --- a/drivers/staging/vc04_services/bcm2835-codec/bcm2835-v4l2-codec.c
  17 +++ b/drivers/staging/vc04_services/bcm2835-codec/bcm2835-v4l2-codec.c
  18 @@ -634,6 +634,9 @@ static void op_buffer_cb(struct vchiq_mm
  19                  __func__, status, mmal_buf, mmal_buf->length,
  20                  mmal_buf->mmal_flags, mmal_buf->pts);
  21
  22 +       buf = container_of(mmal_buf, struct m2m_mmal_buffer, mmal);
  23 +       vb2 = &buf->m2m.vb;
  24 +
  25         if (status) {
  26                 /* error in transfer */
  27                 if (vb2) {
  28 @@ -658,9 +661,6 @@ static void op_buffer_cb(struct vchiq_mm
  29                 return;
  30         }
  31
  32 -       buf = container_of(mmal_buf, struct m2m_mmal_buffer, mmal);
  33 -       vb2 = &buf->m2m.vb;
  34 -
  35         v4l2_dbg(3, debug, &ctx->dev->v4l2_dev, "%s: length %lu, flags %x, idx %u\n",
  36                  __func__, mmal_buf->length, mmal_buf->mmal_flags,
  37                  vb2->vb2_buf.index);