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[media] s5p-jpeg: Fix lack of spin_lock protection 

s5p_jpeg_device_run and s5p_jpeg_runtime_resume callbacks should
have spin_lock protection as they alter device registers.

Signed-off-by: Jacek Anaszewski <j.anaszewski@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Acked-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
This commit is contained in:
Jacek Anaszewski 2013-11-25 06:58:14 -03:00 committed by Mauro Carvalho Chehab
parent f1347132a6
commit b3c932a994
1 changed files with 10 additions and 1 deletions
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11
drivers/media/platform/s5p-jpeg/jpeg-core.c
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@ -930,7 +930,9 @@ static void s5p_jpeg_device_run(void *priv)
struct s5p_jpeg_ctx *ctx = priv;
struct s5p_jpeg *jpeg = ctx->jpeg;
struct vb2_buffer *src_buf, *dst_buf;
unsigned long src_addr, dst_addr;
unsigned long src_addr, dst_addr, flags;
spin_lock_irqsave(&ctx->jpeg->slock, flags);
src_buf = v4l2_m2m_next_src_buf(ctx->fh.m2m_ctx);
dst_buf = v4l2_m2m_next_dst_buf(ctx->fh.m2m_ctx);
@ -998,6 +1000,8 @@ static void s5p_jpeg_device_run(void *priv)
}
jpeg_start(jpeg->regs);
spin_unlock_irqrestore(&ctx->jpeg->slock, flags);
}
static int s5p_jpeg_job_ready(void *priv)
@ -1418,12 +1422,15 @@ static int s5p_jpeg_runtime_suspend(struct device *dev)
static int s5p_jpeg_runtime_resume(struct device *dev)
{
struct s5p_jpeg *jpeg = dev_get_drvdata(dev);
unsigned long flags;
int ret;
ret = clk_prepare_enable(jpeg->clk);
if (ret < 0)
return ret;
spin_lock_irqsave(&jpeg->slock, flags);
/*
* JPEG IP allows storing two Huffman tables for each component
* We fill table 0 for each component
@ -1433,6 +1440,8 @@ static int s5p_jpeg_runtime_resume(struct device *dev)
s5p_jpeg_set_hactbl(jpeg->regs);
s5p_jpeg_set_hactblg(jpeg->regs);
spin_unlock_irqrestore(&jpeg->slock, flags);
return 0;
}