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[net-next,2/2] net: mhi: proto_mbim: Adjust MTU and MRU

Message ID 1614613312-24642-2-git-send-email-loic.poulain@linaro.org
State Superseded
Headers show
Series [net-next,1/2] net: mhi: Allow decoupled MTU/MRU | expand

Commit Message

Loic Poulain March 1, 2021, 3:41 p.m. UTC 
MBIM protocol makes the interface asymmetric, ingress data received
from MHI is MBIM protocol, that can contain multiple aggregated IP
packets, while egress data received from network stack is IP protocol.

Set a default MTU to 1500 (usual network MTU for WWAN), and MRU to 32K
which is the default size of MBIM-over-MHI packets.

Signed-off-by: Loic Poulain <loic.poulain@linaro.org>

---
 drivers/net/mhi/proto_mbim.c | 5 +++++
 1 file changed, 5 insertions(+)

-- 
2.7.4
diff mbox series

Patch

diff --git a/drivers/net/mhi/proto_mbim.c b/drivers/net/mhi/proto_mbim.c
index 75b5484..29d8577 100644
--- a/drivers/net/mhi/proto_mbim.c
+++ b/drivers/net/mhi/proto_mbim.c
@@ -26,6 +26,9 @@ 
 
 #define MBIM_NDP16_SIGN_MASK 0x00ffffff
 
+#define MHI_MBIM_DEFAULT_MRU 32768
+#define MHI_MBIM_DEFAULT_MTU 1500
+
 struct mbim_context {
 	u16 rx_seq;
 	u16 tx_seq;
@@ -282,6 +285,8 @@  static int mbim_init(struct mhi_net_dev *mhi_netdev)
 		return -ENOMEM;
 
 	ndev->needed_headroom = sizeof(struct mbim_tx_hdr);
+	ndev->mtu = MHI_MBIM_DEFAULT_MTU;
+	mhi_netdev->mru = MHI_MBIM_DEFAULT_MRU;
 
 	return 0;
 }