remoteproc: Don't bother checking the return value of debugfs_create*

DebugFS APIs are designed to return only the error pointers and not NULL
in the case of failure. So these return pointers are safe to be passed on
to the successive debugfs_create* APIs.

Therefore, let's just get rid of the checks.

Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Link: https://lore.kernel.org/r/20220329154616.58902-1-manivannan.sadhasivam@linaro.org
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>

Author: Mani-Sadhasivam

drivers/remoteproc/remoteproc_core.c

@@ -684,10 +684,6 @@ static int rproc_handle_trace(struct rproc *rproc, void *ptr,
 
 	/* create the debugfs entry */
 	trace->tfile = rproc_create_trace_file(name, rproc, trace);
-	if (!trace->tfile) {
-		kfree(trace);
-		return -EINVAL;
-	}
 
 	list_add_tail(&trace->node, &rproc->traces);
 

drivers/remoteproc/remoteproc_debugfs.c

@@ -386,16 +386,8 @@ void rproc_remove_trace_file(struct dentry *tfile)
 struct dentry *rproc_create_trace_file(const char *name, struct rproc *rproc,
 				       struct rproc_debug_trace *trace)
 {
-	struct dentry *tfile;
-
-	tfile = debugfs_create_file(name, 0400, rproc->dbg_dir, trace,
+	return debugfs_create_file(name, 0400, rproc->dbg_dir, trace,
 				    &trace_rproc_ops);
-	if (!tfile) {
-		dev_err(&rproc->dev, "failed to create debugfs trace entry\n");
-		return NULL;
-	}
-
-	return tfile;
 }
 
 void rproc_delete_debug_dir(struct rproc *rproc)
@@ -411,8 +403,6 @@ void rproc_create_debug_dir(struct rproc *rproc)
 		return;
 
 	rproc->dbg_dir = debugfs_create_dir(dev_name(dev), rproc_dbg);
-	if (!rproc->dbg_dir)
-		return;
 
 	debugfs_create_file("name", 0400, rproc->dbg_dir,
 			    rproc, &rproc_name_ops);
@@ -430,11 +420,8 @@ void rproc_create_debug_dir(struct rproc *rproc)
 
 void __init rproc_init_debugfs(void)
 {
-	if (debugfs_initialized()) {
+	if (debugfs_initialized())
 		rproc_dbg = debugfs_create_dir(KBUILD_MODNAME, NULL);
-		if (!rproc_dbg)
-			pr_err("can't create debugfs dir\n");
-	}
 }
 
 void __exit rproc_exit_debugfs(void)