From: Sasha Levin <sashal@kernel.org>
To: linux-kernel@vger.kernel.org, stable@vger.kernel.org
Cc: Philipp Zabel <p.zabel@pengutronix.de>,
Hans Verkuil <hverkuil-cisco@xs4all.nl>,
Mauro Carvalho Chehab <mchehab+samsung@kernel.org>,
Sasha Levin <sashal@kernel.org>,
linux-media@vger.kernel.org
Subject: [PATCH AUTOSEL 4.9 49/73] media: coda: fix mpeg2 sequence number handling
Date: Mon, 15 Jul 2019 10:36:05 -0400 [thread overview]
Message-ID: <20190715143629.10893-49-sashal@kernel.org> (raw)
In-Reply-To: <20190715143629.10893-1-sashal@kernel.org>
From: Philipp Zabel <p.zabel@pengutronix.de>
[ Upstream commit 56d159a4ec6d8da7313aac6fcbb95d8fffe689ba ]
Sequence number handling assumed that the BIT processor frame number
starts counting at 1, but this is not true for the MPEG-2 decoder,
which starts at 0. Fix the sequence counter offset detection to handle
this.
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/media/platform/coda/coda-bit.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/drivers/media/platform/coda/coda-bit.c b/drivers/media/platform/coda/coda-bit.c
index 717ee9a6a80e..1b8024f86b0f 100644
--- a/drivers/media/platform/coda/coda-bit.c
+++ b/drivers/media/platform/coda/coda-bit.c
@@ -1581,6 +1581,7 @@ static int __coda_start_decoding(struct coda_ctx *ctx)
coda_write(dev, 0, CODA_REG_BIT_BIT_STREAM_PARAM);
return -ETIMEDOUT;
}
+ ctx->sequence_offset = ~0U;
ctx->initialized = 1;
/* Update kfifo out pointer from coda bitstream read pointer */
@@ -1971,7 +1972,9 @@ static void coda_finish_decode(struct coda_ctx *ctx)
v4l2_err(&dev->v4l2_dev,
"decoded frame index out of range: %d\n", decoded_idx);
} else {
- val = coda_read(dev, CODA_RET_DEC_PIC_FRAME_NUM) - 1;
+ val = coda_read(dev, CODA_RET_DEC_PIC_FRAME_NUM);
+ if (ctx->sequence_offset == -1)
+ ctx->sequence_offset = val;
val -= ctx->sequence_offset;
spin_lock_irqsave(&ctx->buffer_meta_lock, flags);
if (!list_empty(&ctx->buffer_meta_list)) {
--
2.20.1
next prev parent reply other threads:[~2019-07-15 14:40 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20190715143629.10893-1-sashal@kernel.org>
2019-07-15 14:35 ` [PATCH AUTOSEL 4.9 06/73] media: dvb: usb: fix use after free in dvb_usb_device_exit Sasha Levin
2019-07-15 14:35 ` [PATCH AUTOSEL 4.9 08/73] media: marvell-ccic: fix DMA s/g desc number calculation Sasha Levin
2019-07-15 14:35 ` [PATCH AUTOSEL 4.9 09/73] media: vpss: fix a potential NULL pointer dereference Sasha Levin
2019-07-15 14:35 ` [PATCH AUTOSEL 4.9 10/73] media: media_device_enum_links32: clean a reserved field Sasha Levin
2019-07-15 14:35 ` [PATCH AUTOSEL 4.9 19/73] media: mc-device.c: don't memset __user pointer contents Sasha Levin
2019-07-15 14:35 ` [PATCH AUTOSEL 4.9 20/73] media: staging: media: davinci_vpfe: - Fix for memory leak if decoder initialization fails Sasha Levin
2019-07-15 14:35 ` [PATCH AUTOSEL 4.9 24/73] tua6100: Avoid build warnings Sasha Levin
2019-07-15 14:35 ` [PATCH AUTOSEL 4.9 26/73] media: wl128x: Fix some error handling in fm_v4l2_init_video_device() Sasha Levin
2019-07-15 14:36 ` [PATCH AUTOSEL 4.9 45/73] media: i2c: fix warning same module names Sasha Levin
2019-07-15 14:36 ` Sasha Levin [this message]
2019-07-15 14:36 ` [PATCH AUTOSEL 4.9 50/73] media: coda: increment sequence offset for the last returned frame Sasha Levin
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