lkml.org 
[lkml]   [2022]   [Feb]   [14]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH] mailbox: tegra-hsp: Flush whole channel
Date
From: Pekka Pessi <ppessi@nvidia.com>

The txdone can re-fill the mailbox. Keep polling the mailbox during the
flush until all the messages have been delivered.

Signed-off-by: Pekka Pessi <ppessi@nvidia.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
---
drivers/mailbox/tegra-hsp.c | 5 +++++
1 file changed, 5 insertions(+)

diff --git a/drivers/mailbox/tegra-hsp.c b/drivers/mailbox/tegra-hsp.c
index acd0675da681..78f7265039c6 100644
--- a/drivers/mailbox/tegra-hsp.c
+++ b/drivers/mailbox/tegra-hsp.c
@@ -412,6 +412,11 @@ static int tegra_hsp_mailbox_flush(struct mbox_chan *chan,
value = tegra_hsp_channel_readl(ch, HSP_SM_SHRD_MBOX);
if ((value & HSP_SM_SHRD_MBOX_FULL) == 0) {
mbox_chan_txdone(chan, 0);
+
+ /* Wait until channel is empty */
+ if (chan->active_req != NULL)
+ continue;
+
return 0;
}

--
2.35.1
\
 
 \ /
  Last update: 2022-02-14 16:33    [W:0.039 / U:1.176 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site