media: s5p-jpeg: fix pm_runtime_get_sync() usage count

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 dd8088d5a896 ("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 plus, pm_runtime_resume_and_get() doesn't return
positive numbers, so the return code validation can
be removed.

Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Reviewed-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Acked-by: Andrzej Pietrasiewicz <andrzejtp2010@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

diff --git a/drivers/media/platform/s5p-jpeg/jpeg-core.c b/drivers/media/platform/s5p-jpeg/jpeg-core.c
index 0261115..d402e45 100644 (file)
--- a/drivers/media/platform/s5p-jpeg/jpeg-core.c
+++ b/drivers/media/platform/s5p-jpeg/jpeg-core.c
@@ -2566,11 +2566,8 @@ static void s5p_jpeg_buf_queue(struct vb2_buffer *vb)
 static int s5p_jpeg_start_streaming(struct vb2_queue *q, unsigned int count)
 {
        struct s5p_jpeg_ctx *ctx = vb2_get_drv_priv(q);
-       int ret;
-
-       ret = pm_runtime_get_sync(ctx->jpeg->dev);
 
-       return ret > 0 ? 0 : ret;
+       return pm_runtime_resume_and_get(ctx->jpeg->dev);
 }
 
 static void s5p_jpeg_stop_streaming(struct vb2_queue *q)