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media: exynos-gsc: fix pm_runtime_get_sync() usage count

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[ Upstream commit 59087b66ea ]

The pm_runtime_get_sync() internally increments the
dev->power.usage_count without decrementing it, even on errors.
Replace it by the new pm_runtime_resume_and_get(), introduced by:
commit dd8088d5a8 ("PM: runtime: Add pm_runtime_resume_and_get to deal with usage counter")
in order to properly decrement the usage counter, avoiding
a potential PM usage counter leak.

As a bonus, as pm_runtime_get_sync() always return 0 on
success, the logic can be simplified.

Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Reviewed-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Mauro Carvalho Chehab
2021-04-23 17:19:18 +02:00
committed by Greg Kroah-Hartman
parent a8b1889cd6
commit b980385a70
1 changed files with 1 additions and 3 deletions
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4
drivers/media/platform/exynos-gsc/gsc-m2m.c
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@@ -56,10 +56,8 @@ static void __gsc_m2m_job_abort(struct gsc_ctx *ctx)
static int gsc_m2m_start_streaming(struct vb2_queue *q, unsigned int count)
{
struct gsc_ctx *ctx = q->drv_priv;
int ret;
ret = pm_runtime_get_sync(&ctx->gsc_dev->pdev->dev);
return ret > 0 ? 0 : ret;
return pm_runtime_resume_and_get(&ctx->gsc_dev->pdev->dev);
}
static void __gsc_m2m_cleanup_queue(struct gsc_ctx *ctx)