This is a note to let you know that I've just added the patch titled
net: wwan: iosm: fix invalid mux header type
to the 6.0-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
net-wwan-iosm-fix-invalid-mux-header-type.patch
and it can be found in the queue-6.0 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit e1146a410f201e8b3b31b81a16bbc78eef96fd81
Author: M Chetan Kumar <m.chetan.kumar@xxxxxxxxxxxxxxx>
Date: Mon Nov 7 13:05:13 2022 +0530
net: wwan: iosm: fix invalid mux header type
[ Upstream commit 02d2d2ea4a3bc2391f6ac31f6854da83e8a63829 ]
Data stall seen during peak DL throughput test & packets are
dropped by mux layer due to invalid header type in datagram.
During initlization Mux aggregration protocol is set to default
UL/DL size and TD count of Mux lite protocol. This configuration
mismatch between device and driver is resulting in data stall/packet
drops.
Override the UL/DL size and TD count for Mux aggregation protocol.
Fixes: 1f52d7b62285 ("net: wwan: iosm: Enable M.2 7360 WWAN card support")
Signed-off-by: M Chetan Kumar <m.chetan.kumar@xxxxxxxxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/net/wwan/iosm/iosm_ipc_imem_ops.c b/drivers/net/wwan/iosm/iosm_ipc_imem_ops.c
index 57304a5adf68..6e32eb91bba9 100644
--- a/drivers/net/wwan/iosm/iosm_ipc_imem_ops.c
+++ b/drivers/net/wwan/iosm/iosm_ipc_imem_ops.c
@@ -91,6 +91,14 @@ void ipc_imem_wwan_channel_init(struct iosm_imem *ipc_imem,
}
ipc_chnl_cfg_get(&chnl_cfg, ipc_imem->nr_of_channels);
+
+ if (ipc_imem->mmio->mux_protocol == MUX_AGGREGATION &&
+ ipc_imem->nr_of_channels == IPC_MEM_IP_CHL_ID_0) {
+ chnl_cfg.ul_nr_of_entries = IPC_MEM_MAX_TDS_MUX_AGGR_UL;
+ chnl_cfg.dl_nr_of_entries = IPC_MEM_MAX_TDS_MUX_AGGR_DL;
+ chnl_cfg.dl_buf_size = IPC_MEM_MAX_ADB_BUF_SIZE;
+ }
+
ipc_imem_channel_init(ipc_imem, IPC_CTYPE_WWAN, chnl_cfg,
IRQ_MOD_OFF);
diff --git a/drivers/net/wwan/iosm/iosm_ipc_mux.h b/drivers/net/wwan/iosm/iosm_ipc_mux.h
index cd9d74cc097f..9968bb885c1f 100644
--- a/drivers/net/wwan/iosm/iosm_ipc_mux.h
+++ b/drivers/net/wwan/iosm/iosm_ipc_mux.h
@@ -10,6 +10,7 @@
#define IPC_MEM_MAX_UL_DG_ENTRIES 100
#define IPC_MEM_MAX_TDS_MUX_AGGR_UL 60
+#define IPC_MEM_MAX_TDS_MUX_AGGR_DL 60
#define IPC_MEM_MAX_ADB_BUF_SIZE (16 * 1024)
#define IPC_MEM_MAX_UL_ADB_BUF_SIZE IPC_MEM_MAX_ADB_BUF_SIZE
