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On trace stop, hisi_ptt_update_aux() copies only=0A= the number of bytes reported in HISI_PTT_TRACE_WR_STS. On buffer-full=0A= interrupts, it copies a full completed buffer. In both cases the driver=0A= only consumes data written by hardware.=0A= =0A= Remove the buffer clearing from the trace start path.=0A= =0A= Signed-off-by: Sanman Pradhan =0A= Reviewed-by: Yicong Yang =0A= ---=0A= v2:=0A= - No changes=0A= =0A= drivers/hwtracing/ptt/hisi_ptt.c | 5 -----=0A= 1 file changed, 5 deletions(-)=0A= =0A= diff --git a/drivers/hwtracing/ptt/hisi_ptt.c b/drivers/hwtracing/ptt/hisi_= ptt.c=0A= index b5d851281fbf0..a8f6986c8e1f7 100644=0A= --- a/drivers/hwtracing/ptt/hisi_ptt.c=0A= +++ b/drivers/hwtracing/ptt/hisi_ptt.c=0A= @@ -194,7 +194,6 @@ static int hisi_ptt_trace_start(struct hisi_ptt *hisi_p= tt)=0A= {=0A= struct hisi_ptt_trace_ctrl *ctrl =3D &hisi_ptt->trace_ctrl;=0A= u32 val;=0A= - int i;=0A= =0A= /* Check device idle before start trace */=0A= if (!hisi_ptt_wait_trace_hw_idle(hisi_ptt)) {=0A= @@ -222,10 +221,6 @@ static int hisi_ptt_trace_start(struct hisi_ptt *hisi_= ptt)=0A= /* Reset the index of current buffer */=0A= hisi_ptt->trace_ctrl.buf_index =3D 0;=0A= =0A= - /* Zero the trace buffers */=0A= - for (i =3D 0; i < HISI_PTT_TRACE_BUF_CNT; i++)=0A= - memset(ctrl->trace_buf[i].addr, 0, HISI_PTT_TRACE_BUF_SIZE);=0A= -=0A= /* Clear the interrupt status */=0A= writel(HISI_PTT_TRACE_INT_STAT_MASK, hisi_ptt->iobase + HISI_PTT_TRACE_IN= T_STAT);=0A= writel(0, hisi_ptt->iobase + HISI_PTT_TRACE_INT_MASK);=0A= -- =0A= 2.34.1=0A= =0A=