net: wwan: iosm: consolidate trace port init code

Move the channel related structures initialization from
ipc_imem_channel_init() to ipc_trace_init() and call it directly. On the
one hand, this makes the trace port initialization symmetric to the
deitialization, that is, it removes the additional wrapper.

On the other hand, this change consolidates the trace port related code
into a single source file, what facilitates an upcoming disabling of
this functionality by a user choise.
Signed-off-by: Sergey Ryazanov <ryazanov.s.a@gmail.com>
Reviewed-by: Loic Poulain <loic.poulain@linaro.org>
Acked-by: M Chetan Kumar <m.chetan.kumar@intel.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

drivers/net/wwan/iosm/iosm_ipc_imem.c

@@ -554,7 +554,7 @@ static void ipc_imem_run_state_worker(struct work_struct *instance)
 		ctrl_chl_idx++;
 	}
 
-	ipc_imem->trace = ipc_imem_trace_channel_init(ipc_imem);
+	ipc_imem->trace = ipc_trace_init(ipc_imem);
 	if (!ipc_imem->trace) {
 		dev_err(ipc_imem->dev, "trace channel init failed");
 		return;

drivers/net/wwan/iosm/iosm_ipc_imem_ops.c

@@ -11,7 +11,6 @@
 #include "iosm_ipc_imem_ops.h"
 #include "iosm_ipc_port.h"
 #include "iosm_ipc_task_queue.h"
-#include "iosm_ipc_trace.h"
 
 /* Open a packet data online channel between the network layer and CP. */
 int ipc_imem_sys_wwan_open(struct iosm_imem *ipc_imem, int if_id)
@@ -108,23 +107,6 @@ void ipc_imem_wwan_channel_init(struct iosm_imem *ipc_imem,
 			"failed to register the ipc_wwan interfaces");
 }
 
-/**
- * ipc_imem_trace_channel_init - Initializes trace channel.
- * @ipc_imem:          Pointer to iosm_imem struct.
- *
- * Returns: Pointer to trace instance on success else NULL
- */
-struct iosm_trace *ipc_imem_trace_channel_init(struct iosm_imem *ipc_imem)
-{
-	struct ipc_chnl_cfg chnl_cfg = { 0 };
-
-	ipc_chnl_cfg_get(&chnl_cfg, IPC_MEM_CTRL_CHL_ID_3);
-	ipc_imem_channel_init(ipc_imem, IPC_CTYPE_CTRL, chnl_cfg,
-			      IRQ_MOD_OFF);
-
-	return ipc_trace_init(ipc_imem);
-}
-
 /* Map SKB to DMA for transfer */
 static int ipc_imem_map_skb_to_dma(struct iosm_imem *ipc_imem,
 				   struct sk_buff *skb)

drivers/net/wwan/iosm/iosm_ipc_imem_ops.h

@@ -141,5 +141,5 @@ int ipc_imem_sys_devlink_read(struct iosm_devlink *ipc_devlink, u8 *data,
  */
 int ipc_imem_sys_devlink_write(struct iosm_devlink *ipc_devlink,
 			       unsigned char *buf, int count);
-struct iosm_trace *ipc_imem_trace_channel_init(struct iosm_imem *ipc_imem);
+
 #endif

drivers/net/wwan/iosm/iosm_ipc_trace.c

@@ -132,9 +132,15 @@ static const struct file_operations ipc_trace_fops = {
  */
 struct iosm_trace *ipc_trace_init(struct iosm_imem *ipc_imem)
 {
-	struct iosm_trace *ipc_trace = kzalloc(sizeof(*ipc_trace), GFP_KERNEL);
+	struct ipc_chnl_cfg chnl_cfg = { 0 };
+	struct iosm_trace *ipc_trace;
 	struct dentry *debugfs_pdev;
 
+	ipc_chnl_cfg_get(&chnl_cfg, IPC_MEM_CTRL_CHL_ID_3);
+	ipc_imem_channel_init(ipc_imem, IPC_CTYPE_CTRL, chnl_cfg,
+			      IRQ_MOD_OFF);
+
+	ipc_trace = kzalloc(sizeof(*ipc_trace), GFP_KERNEL);
 	if (!ipc_trace)
 		return NULL;