net: wwan: iosm: Fix memory leak in ipc_mux_deinit()

Commit 1f52d7b ("net: wwan: iosm: Enable M.2 7360 WWAN card support")
allocated memory for pp_qlt in ipc_mux_init() but did not free it in
ipc_mux_deinit(). This results in a memory leak when the driver is
unloaded.

Free the allocated memory in ipc_mux_deinit() to fix the leak.

Fixes: 1f52d7b ("net: wwan: iosm: Enable M.2 7360 WWAN card support")
Co-developed-by: Jianhao Xu <[email protected]>
Signed-off-by: Jianhao Xu <[email protected]>
Signed-off-by: Zilin Guan <[email protected]>
Reviewed-by: Loic Poulain <[email protected]>
Link: https://patch.msgid.link/[email protected]
Signed-off-by: Jakub Kicinski <[email protected]>

Author: GoodLuck612

drivers/net/wwan/iosm/iosm_ipc_mux.c

@@ -456,6 +456,7 @@ void ipc_mux_deinit(struct iosm_mux *ipc_mux)
 	struct sk_buff_head *free_list;
 	union mux_msg mux_msg;
 	struct sk_buff *skb;
+	int i;
 
 	if (!ipc_mux->initialized)
 		return;
@@ -479,5 +480,10 @@ void ipc_mux_deinit(struct iosm_mux *ipc_mux)
 		ipc_mux->channel->dl_pipe.is_open = false;
 	}
 
+	if (ipc_mux->protocol != MUX_LITE) {
+		for (i = 0; i < IPC_MEM_MUX_IP_SESSION_ENTRIES; i++)
+			kfree(ipc_mux->ul_adb.pp_qlt[i]);
+	}
+
 	kfree(ipc_mux);
 }