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msm: cvp: avoid checking read_idx again

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checking new_read_idx with write_idx and
rechecking the read and write idx after resetting request.

Change-Id: I375837f8f4ad3d1445bcbdd89dc5c79e4cea0f9d
Signed-off-by: suchawla <suchawla@codeaurora.org>
This commit is contained in:
suchawla 2020-03-27 23:11:06 +05:30 • committed by Gerrit - the friendly Code Review server
commit ccf452010a
1 changed files with 12 additions and 8 deletions
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20
drivers/media/platform/msm/cvp/cvp_hfi.c
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@ -723,13 +723,17 @@ static int __read_queue(struct cvp_iface_q_info *qinfo, u8 *packet,
*/
mb();
*pb_tx_req_is_set = 0;
spin_unlock(&qinfo->hfi_lock);
dprintk(CVP_DBG,
"%s queue is empty, rx_req = %u, tx_req = %u, read_idx = %u\n",
receive_request ? "message" : "debug",
queue->qhdr_rx_req, queue->qhdr_tx_req,
queue->qhdr_read_idx);
return -ENODATA;
if (write_idx != queue->qhdr_write_idx) {
queue->qhdr_rx_req = 0;
} else {
spin_unlock(&qinfo->hfi_lock);
dprintk(CVP_DBG,
"%s queue is empty, rx_req = %u, tx_req = %u, read_idx = %u\n",
receive_request ? "message" : "debug",
queue->qhdr_rx_req, queue->qhdr_tx_req,
queue->qhdr_read_idx);
return -ENODATA;
}
}
read_ptr = (u32 *)((qinfo->q_array.align_virtual_addr) +
@ -773,7 +777,7 @@ static int __read_queue(struct cvp_iface_q_info *qinfo, u8 *packet,
rc = -ENODATA;
}
if (read_idx != write_idx)
if (new_read_idx != queue->qhdr_write_idx)
queue->qhdr_rx_req = 0;
else
queue->qhdr_rx_req = receive_request;