We should explicitly ACK mailbox message because after
sending message we can know the send status via error
attribute of brcm_message.
This will also help SBA-RAID to use "txdone_ack" method
whenever mailbox controller supports it.
Signed-off-by: Anup Patel <anup.patel@xxxxxxxxxxxx>
Reviewed-by: Ray Jui <ray.jui@xxxxxxxxxxxx>
---
drivers/dma/bcm-sba-raid.c | 10 +++++++---
1 file changed, 7 insertions(+), 3 deletions(-)
diff --git a/drivers/dma/bcm-sba-raid.c b/drivers/dma/bcm-sba-raid.c
index 12310aa..0c41136 100644
--- a/drivers/dma/bcm-sba-raid.c
+++ b/drivers/dma/bcm-sba-raid.c
@@ -396,13 +396,17 @@ static int sba_send_mbox_request(struct sba_device *sba,
dev_err(sba->dev, "send message failed with error %d", ret);
return ret;
}
+
+ /* Check error returned by mailbox controller */
ret = req->msg.error;
if (ret < 0) {
dev_err(sba->dev, "message error %d", ret);
- return ret;
}
- return 0;
+ /* Signal txdone for mailbox channel */
+ mbox_client_txdone(sba->mchans[mchans_idx], ret);
+
+ return ret;
}
/* Note: Must be called with sba->reqs_lock held */
@@ -1724,7 +1728,7 @@ static int sba_probe(struct platform_device *pdev)
sba->client.dev = &pdev->dev;
sba->client.rx_callback = sba_receive_message;
sba->client.tx_block = false;
- sba->client.knows_txdone = false;
+ sba->client.knows_txdone = true;
sba->client.tx_tout = 0;
/* Allocate mailbox channel array */
--
2.7.4
--
To unsubscribe from this list: send the line "unsubscribe dmaengine" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
