target/linux/bcm27xx/patches-5.4/950-0976-staging-bcm2835-codec-Correct-buffer-number-change-o.patch

   1 From 96f4d69496b483b8eb65dc4602d5cb96844f6647 Mon Sep 17 00:00:00 2001
   2 From: Dave Stevenson <dave.stevenson@raspberrypi.com>
   3 Date: Wed, 30 Sep 2020 12:13:44 +0100
   4 Subject: [PATCH] staging: bcm2835-codec: Correct buffer number
   5  change on start streaming
   6
   7 "cac8c90 staging: vc04_service: codec: Allow start_streaming to update
   8 the buffernum" allowed the number of buffers configured to be decreased
   9 as well as increased, but there is no requirement for all buffers to
  10 have been queued when start_streaming is called.
  11
  12 Only allow increasing the buffernum.
  13
  14 Fixes: "cac8c90 staging: vc04_service: codec: Allow start_streaming to update the buffernum"
  15 Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
  16 ---
  17  .../staging/vc04_services/bcm2835-codec/bcm2835-v4l2-codec.c    | 2 +-
  18  1 file changed, 1 insertion(+), 1 deletion(-)
  19
  20 --- a/drivers/staging/vc04_services/bcm2835-codec/bcm2835-v4l2-codec.c
  21 +++ b/drivers/staging/vc04_services/bcm2835-codec/bcm2835-v4l2-codec.c
  22 @@ -2290,7 +2290,7 @@ static int bcm2835_codec_start_streaming
  23         if (count < port->minimum_buffer.num)
  24                 count = port->minimum_buffer.num;
  25
  26 -       if (port->current_buffer.num != count + 1) {
  27 +       if (port->current_buffer.num < count + 1) {
  28                 v4l2_dbg(2, debug, &ctx->dev->v4l2_dev, "%s: ctx:%p, buffer count changed %u to %u\n",
  29                          __func__, ctx, port->current_buffer.num, count + 1);
  30