From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Date: Tue, 22 Jan 2019 16:17:54 +0100
Subject: infiniband: hfi1: drop crazy DEBUGFS_SEQ_FILE_CREATE() macro
Patch-mainline: v5.1-rc1
Git-commit: 5c43276499f912ae7aec06737a3c6e0f0f3ba74b
References: jsc#SLE-4925

The macro was just making things harder to follow, and audit, so remove
it and call debugfs_create_file() directly.  Also, the macro did not
need to warn about the call failing as no one should ever care about any
debugfs functions failing.

Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Acked-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
 drivers/infiniband/hw/hfi1/debugfs.c |   56 +++++++++++++++++------------------
 drivers/infiniband/hw/hfi1/debugfs.h |   12 -------
 drivers/infiniband/hw/hfi1/fault.c   |    3 +
 3 files changed, 30 insertions(+), 41 deletions(-)

--- a/drivers/infiniband/hw/hfi1/debugfs.c
+++ b/drivers/infiniband/hw/hfi1/debugfs.c
@@ -1167,6 +1167,7 @@ void hfi1_dbg_ibdev_init(struct hfi1_ibd
 	char link[10];
 	struct hfi1_devdata *dd = dd_from_dev(ibd);
 	struct hfi1_pportdata *ppd;
+	struct dentry *root;
 	int unit = dd->unit;
 	int i, j;
 
@@ -1174,31 +1175,29 @@ void hfi1_dbg_ibdev_init(struct hfi1_ibd
 		return;
 	snprintf(name, sizeof(name), "%s_%d", class_name(), unit);
 	snprintf(link, sizeof(link), "%d", unit);
-	ibd->hfi1_ibdev_dbg = debugfs_create_dir(name, hfi1_dbg_root);
-	if (!ibd->hfi1_ibdev_dbg) {
-		pr_warn("create of %s failed\n", name);
-		return;
-	}
+	root = debugfs_create_dir(name, hfi1_dbg_root);
+	ibd->hfi1_ibdev_dbg = root;
+
 	ibd->hfi1_ibdev_link =
 		debugfs_create_symlink(link, hfi1_dbg_root, name);
-	if (!ibd->hfi1_ibdev_link) {
-		pr_warn("create of %s symlink failed\n", name);
-		return;
-	}
-	DEBUGFS_SEQ_FILE_CREATE(opcode_stats, ibd->hfi1_ibdev_dbg, ibd);
-	DEBUGFS_SEQ_FILE_CREATE(tx_opcode_stats, ibd->hfi1_ibdev_dbg, ibd);
-	DEBUGFS_SEQ_FILE_CREATE(ctx_stats, ibd->hfi1_ibdev_dbg, ibd);
-	DEBUGFS_SEQ_FILE_CREATE(qp_stats, ibd->hfi1_ibdev_dbg, ibd);
-	DEBUGFS_SEQ_FILE_CREATE(sdes, ibd->hfi1_ibdev_dbg, ibd);
-	DEBUGFS_SEQ_FILE_CREATE(rcds, ibd->hfi1_ibdev_dbg, ibd);
-	DEBUGFS_SEQ_FILE_CREATE(pios, ibd->hfi1_ibdev_dbg, ibd);
-	DEBUGFS_SEQ_FILE_CREATE(sdma_cpu_list, ibd->hfi1_ibdev_dbg, ibd);
+
+	debugfs_create_file("opcode_stats", 0444, root, ibd,
+			    &_opcode_stats_file_ops);
+	debugfs_create_file("tx_opcode_stats", 0444, root, ibd,
+			    &_tx_opcode_stats_file_ops);
+	debugfs_create_file("ctx_stats", 0444, root, ibd, &_ctx_stats_file_ops);
+	debugfs_create_file("qp_stats", 0444, root, ibd, &_qp_stats_file_ops);
+	debugfs_create_file("sdes", 0444, root, ibd, &_sdes_file_ops);
+	debugfs_create_file("rcds", 0444, root, ibd, &_rcds_file_ops);
+	debugfs_create_file("pios", 0444, root, ibd, &_pios_file_ops);
+	debugfs_create_file("sdma_cpu_list", 0444, root, ibd,
+			    &_sdma_cpu_list_file_ops);
+
 	/* dev counter files */
 	for (i = 0; i < ARRAY_SIZE(cntr_ops); i++)
-		DEBUGFS_FILE_CREATE(cntr_ops[i].name,
-				    ibd->hfi1_ibdev_dbg,
-				    dd,
-				    &cntr_ops[i].ops, S_IRUGO);
+		debugfs_create_file(cntr_ops[i].name, 0444, root, dd,
+				    &cntr_ops[i].ops);
+
 	/* per port files */
 	for (ppd = dd->pport, j = 0; j < dd->num_pports; j++, ppd++)
 		for (i = 0; i < ARRAY_SIZE(port_cntr_ops); i++) {
@@ -1206,12 +1205,11 @@ void hfi1_dbg_ibdev_init(struct hfi1_ibd
 				 sizeof(name),
 				 port_cntr_ops[i].name,
 				 j + 1);
-			DEBUGFS_FILE_CREATE(name,
-					    ibd->hfi1_ibdev_dbg,
-					    ppd,
-					    &port_cntr_ops[i].ops,
+			debugfs_create_file(name,
 					    !port_cntr_ops[i].ops.write ?
-					    S_IRUGO : S_IRUGO | S_IWUSR);
+						    S_IRUGO :
+						    S_IRUGO | S_IWUSR,
+					    root, ppd, &port_cntr_ops[i].ops);
 		}
 
 	hfi1_fault_init_debugfs(ibd);
@@ -1343,8 +1341,10 @@ void hfi1_dbg_init(void)
 	hfi1_dbg_root  = debugfs_create_dir(DRIVER_NAME, NULL);
 	if (!hfi1_dbg_root)
 		pr_warn("init of debugfs failed\n");
-	DEBUGFS_SEQ_FILE_CREATE(driver_stats_names, hfi1_dbg_root, NULL);
-	DEBUGFS_SEQ_FILE_CREATE(driver_stats, hfi1_dbg_root, NULL);
+	debugfs_create_file("driver_stats_names", 0444, hfi1_dbg_root, NULL,
+			    &_driver_stats_names_file_ops);
+	debugfs_create_file("driver_stats", 0444, hfi1_dbg_root, NULL,
+			    &_driver_stats_file_ops);
 }
 
 void hfi1_dbg_exit(void)
--- a/drivers/infiniband/hw/hfi1/debugfs.h
+++ b/drivers/infiniband/hw/hfi1/debugfs.h
@@ -49,16 +49,6 @@
 
 struct hfi1_ibdev;
 
-#define DEBUGFS_FILE_CREATE(name, parent, data, ops, mode)	\
-do { \
-	struct dentry *ent; \
-	const char *__name = name; \
-	ent = debugfs_create_file(__name, mode, parent, \
-		data, ops); \
-	if (!ent) \
-		pr_warn("create of %s failed\n", __name); \
-} while (0)
-
 #define DEBUGFS_SEQ_FILE_OPS(name) \
 static const struct seq_operations _##name##_seq_ops = { \
 	.start = _##name##_seq_start, \
@@ -89,8 +79,6 @@ static const struct file_operations _##n
 	.release = seq_release \
 }
 
-#define DEBUGFS_SEQ_FILE_CREATE(name, parent, data) \
-	DEBUGFS_FILE_CREATE(#name, parent, data, &_##name##_file_ops, 0444)
 
 ssize_t hfi1_seq_read(struct file *file, char __user *buf, size_t size,
 		      loff_t *ppos);
--- a/drivers/infiniband/hw/hfi1/fault.c
+++ b/drivers/infiniband/hw/hfi1/fault.c
@@ -278,7 +278,8 @@ int hfi1_fault_init_debugfs(struct hfi1_
 		return -ENOENT;
 	}
 
-	DEBUGFS_SEQ_FILE_CREATE(fault_stats, ibd->fault->dir, ibd);
+	debugfs_create_file("fault_stats", 0444, ibd->fault->dir, ibd,
+			    &_fault_stats_file_ops);
 	if (!debugfs_create_bool("enable", 0600, ibd->fault->dir,
 				 &ibd->fault->enable))
 		goto fail;