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media: mediatek: vcodec: fix possible unbalanced PM counter

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[ Upstream commit c28d4921a1 ]

It is possible that mtk_vcodec_enc_pw_on fails, and in that scenario
the PM counter is not incremented, and subsequent call to
mtk_vcodec_enc_pw_off decrements the counter, leading to a PM imbalance.
Fix by bailing out of venc_if_encode in the case when mtk_vcodec_enc_pw_on
fails.

Fixes: 4e855a6efa ("[media] vcodec: mediatek: Add Mediatek V4L2 Video Encoder Driver")
Signed-off-by: Eugen Hristev <eugen.hristev@collabora.com>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Signed-off-by: Andrzej Pietrasiewicz <andrzej.p@collabora.com>
Signed-off-by: Sebastian Fricke <sebastian.fricke@collabora.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Eugen Hristev 2023-12-28 13:32:40 +02:00 committed by Greg Kroah-Hartman
parent f29a426420
commit c73d327327
3 changed files with 8 additions and 3 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

4
drivers/media/platform/mediatek/vcodec/encoder/mtk_vcodec_enc_pm.c
View file

@ -58,13 +58,15 @@ int mtk_vcodec_init_enc_clk(struct mtk_vcodec_enc_dev *mtkdev)
return 0;
}
void mtk_vcodec_enc_pw_on(struct mtk_vcodec_pm *pm)
int mtk_vcodec_enc_pw_on(struct mtk_vcodec_pm *pm)
{
int ret;
ret = pm_runtime_resume_and_get(pm->dev);
if (ret)
dev_err(pm->dev, "pm_runtime_resume_and_get fail: %d", ret);
return ret;
}
void mtk_vcodec_enc_pw_off(struct mtk_vcodec_pm *pm)

2
drivers/media/platform/mediatek/vcodec/encoder/mtk_vcodec_enc_pm.h
View file

@ -10,7 +10,7 @@
#include "mtk_vcodec_enc_drv.h"
int mtk_vcodec_init_enc_clk(struct mtk_vcodec_enc_dev *dev);
void mtk_vcodec_enc_pw_on(struct mtk_vcodec_pm *pm);
int mtk_vcodec_enc_pw_on(struct mtk_vcodec_pm *pm);
void mtk_vcodec_enc_pw_off(struct mtk_vcodec_pm *pm);
void mtk_vcodec_enc_clock_on(struct mtk_vcodec_pm *pm);
void mtk_vcodec_enc_clock_off(struct mtk_vcodec_pm *pm);

5
drivers/media/platform/mediatek/vcodec/encoder/venc_drv_if.c
View file

@ -64,7 +64,9 @@ int venc_if_encode(struct mtk_vcodec_enc_ctx *ctx,
ctx->dev->curr_ctx = ctx;
spin_unlock_irqrestore(&ctx->dev->irqlock, flags);
mtk_vcodec_enc_pw_on(&ctx->dev->pm);
ret = mtk_vcodec_enc_pw_on(&ctx->dev->pm);
if (ret)
goto venc_if_encode_pw_on_err;
mtk_vcodec_enc_clock_on(&ctx->dev->pm);
ret = ctx->enc_if->encode(ctx->drv_handle, opt, frm_buf,
bs_buf, result);
@ -75,6 +77,7 @@ int venc_if_encode(struct mtk_vcodec_enc_ctx *ctx,
ctx->dev->curr_ctx = NULL;
spin_unlock_irqrestore(&ctx->dev->irqlock, flags);
venc_if_encode_pw_on_err:
mtk_venc_unlock(ctx);
return ret;
}