From e541397ebd45c0edffd0b7ebb28cdfd35b7fbd32 Mon Sep 17 00:00:00 2001
From: Vivek Pernamitta <quic_vpernami@quicinc.com>
Date: Wed, 29 Dec 2021 15:17:30 +0530
Subject: [PATCH] bus: mhi: host: Release mhi_chan write lock on map_single
 fails

Release mhi_chan write lock before returning on map_single
callback failure.

Change-Id: Iab4bcc878ff5ed7d11c6e943f949ab39dc77b829
Signed-off-by: Vivek Pernamitta <quic_vpernami@quicinc.com>
Signed-off-by: Lazarus Motha <quic_lmotha@quicinc.com>
---
 drivers/bus/mhi/host/main.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/bus/mhi/host/main.c b/drivers/bus/mhi/host/main.c
index 2a790dd43278..3c5a433a152d 100644
--- a/drivers/bus/mhi/host/main.c
+++ b/drivers/bus/mhi/host/main.c
@@ -1300,8 +1300,10 @@ int mhi_gen_tre(struct mhi_controller *mhi_cntrl, struct mhi_chan *mhi_chan,
 
 	if (!info->pre_mapped) {
 		ret = mhi_cntrl->map_single(mhi_cntrl, buf_info);
-		if (ret)
+		if (ret) {
+			write_unlock_bh(&mhi_chan->lock);
 			return ret;
+		}
 	}
 
 	eob = !!(flags & MHI_EOB);