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fix serial dma rx ringbuffer position mismatch #10535

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fix serial dma rx ringbuffer position mismatch #10535

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8 changes: 4 additions & 4 deletions components/drivers/include/ipc/ringbuffer.h
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Original file line number Diff line number Diff line change
Expand Up @@ -41,10 +41,10 @@ struct rt_ringbuffer
* read_idx-^ ^-write_idx
*/

rt_uint32_t read_mirror : 1;
rt_uint32_t read_index : 31;
rt_uint32_t write_mirror : 1;
rt_uint32_t write_index : 31;
volatile rt_uint32_t read_mirror : 1;
volatile rt_uint32_t read_index : 31;
volatile rt_uint32_t write_mirror : 1;
volatile rt_uint32_t write_index : 31;
/* as we use msb of index as mirror bit, the size should be signed and
* could only be positive. */
rt_int32_t buffer_size;
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