linux-kernel - [PATCH v1 2/2] net: wwan: Fix SDX72 ping failure issue

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Message-Id: <20240607100309.453122-1-slark_xiao@163.com>
Date: Fri,  7 Jun 2024 18:03:09 +0800
From: Slark Xiao <slark_xiao@....com>
To: loic.poulain@...aro.org,
	ryazanov.s.a@...il.com
Cc: netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	manivannan.sadhasivam@...aro.org,
	Slark Xiao <slark_xiao@....com>
Subject: [PATCH v1 2/2] net: wwan: Fix SDX72 ping failure issue

For SDX72 MBIM device, it starts data mux id from 112 instead of 0.
This would lead to device can't ping outside successfully.
Also MBIM side would report "bad packet session (112)".
So we add a link id default value for these SDX72 products which
works in MBIM mode.

Signed-off-by: Slark Xiao <slark_xiao@....com>
---
 drivers/net/wwan/mhi_wwan_mbim.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/net/wwan/mhi_wwan_mbim.c b/drivers/net/wwan/mhi_wwan_mbim.c
index 3f72ae943b29..4ca5c845394b 100644
--- a/drivers/net/wwan/mhi_wwan_mbim.c
+++ b/drivers/net/wwan/mhi_wwan_mbim.c
@@ -618,7 +618,8 @@ static int mhi_mbim_probe(struct mhi_device *mhi_dev, const struct mhi_device_id
 	mbim->rx_queue_sz = mhi_get_free_desc_count(mhi_dev, DMA_FROM_DEVICE);
 
 	/* Register wwan link ops with MHI controller representing WWAN instance */
-	return wwan_register_ops(&cntrl->mhi_dev->dev, &mhi_mbim_wwan_ops, mbim, 0);
+	return wwan_register_ops(&cntrl->mhi_dev->dev, &mhi_mbim_wwan_ops, mbim,
+		mhi_dev->mhi_cntrl->link_id ? mhi_dev->mhi_cntrl->link_id : 0);
 }
 
 static void mhi_mbim_remove(struct mhi_device *mhi_dev)
-- 
2.25.1