From 9ee50a9489f16048a82c94139f5436f4bb2620d9 Mon Sep 17 00:00:00 2001 From: Philipp Zabel Date: Tue, 18 Jun 2019 12:45:30 -0400 Subject: media: coda: lock capture queue wakeup against encoder stop command Make sure that an encoder stop command running concurrently with an encoder finish_run always either flags the last returned buffer or wakes up the capture queue to signal the end of stream condition afterwards. Signed-off-by: Philipp Zabel Signed-off-by: Hans Verkuil Signed-off-by: Mauro Carvalho Chehab --- drivers/media/platform/coda/coda-bit.c | 7 +++++++ 1 file changed, 7 insertions(+) (limited to 'drivers/media/platform/coda/coda-bit.c') diff --git a/drivers/media/platform/coda/coda-bit.c b/drivers/media/platform/coda/coda-bit.c index 7bcdfe8dcf3d..44085e3d43d5 100644 --- a/drivers/media/platform/coda/coda-bit.c +++ b/drivers/media/platform/coda/coda-bit.c @@ -1540,6 +1540,12 @@ static void coda_finish_encode(struct coda_ctx *ctx) struct coda_dev *dev = ctx->dev; u32 wr_ptr, start_ptr; + /* + * Lock to make sure that an encoder stop command running in parallel + * will either already have marked src_buf as last, or it will wake up + * the capture queue after the buffers are returned. + */ + mutex_lock(&ctx->wakeup_mutex); src_buf = v4l2_m2m_src_buf_remove(ctx->fh.m2m_ctx); dst_buf = v4l2_m2m_next_dst_buf(ctx->fh.m2m_ctx); @@ -1580,6 +1586,7 @@ static void coda_finish_encode(struct coda_ctx *ctx) dst_buf = v4l2_m2m_dst_buf_remove(ctx->fh.m2m_ctx); coda_m2m_buf_done(ctx, dst_buf, VB2_BUF_STATE_DONE); + mutex_unlock(&ctx->wakeup_mutex); ctx->gopcounter--; if (ctx->gopcounter < 0) -- cgit v1.2.3