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2024-05-10 37f49e37ab4cb5d0bc4c60eb5c6d4dd57db767bb

 kernel/include/media/v4l2-mem2mem.h
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@@ -588,7 +588,14 @@
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 static inline
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 unsigned int v4l2_m2m_num_src_bufs_ready(struct v4l2_m2m_ctx *m2m_ctx)
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 {
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-	return m2m_ctx->out_q_ctx.num_rdy;
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+	unsigned int num_buf_rdy;
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+	unsigned long flags;
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+
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+	spin_lock_irqsave(&m2m_ctx->out_q_ctx.rdy_spinlock, flags);
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+	num_buf_rdy = m2m_ctx->out_q_ctx.num_rdy;
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+	spin_unlock_irqrestore(&m2m_ctx->out_q_ctx.rdy_spinlock, flags);
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+
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+	return num_buf_rdy;
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 }
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 /**
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@@ -600,7 +607,14 @@
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 static inline
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 unsigned int v4l2_m2m_num_dst_bufs_ready(struct v4l2_m2m_ctx *m2m_ctx)
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 {
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-	return m2m_ctx->cap_q_ctx.num_rdy;
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+	unsigned int num_buf_rdy;
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+	unsigned long flags;
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+
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+	spin_lock_irqsave(&m2m_ctx->cap_q_ctx.rdy_spinlock, flags);
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+	num_buf_rdy = m2m_ctx->cap_q_ctx.num_rdy;
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+	spin_unlock_irqrestore(&m2m_ctx->cap_q_ctx.rdy_spinlock, flags);
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+
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+	return num_buf_rdy;
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 }
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 /**