From e5445ee6a62329f6eb28b8ebd8ff4c4659ca0209 Mon Sep 17 00:00:00 2001
From: Axel Lin <axel.lin@ingics.com>
Date: Tue, 25 Sep 2012 11:54:36 +0800
Subject: [PATCH] memory: emif: Add ifdef CONFIG_DEBUG_FS guard for
emif_debugfs_[init|exit]
Add ifdef CONFIG_DEBUG_FS guard for emif_debugfs_[init|exit], and adds stub
functions for the case CONFIG_DEBUG_FS is not set.
When CONFIG_DEBUG_FS is enabled, debugfs_create_dir and debugfs_create_file
return NULL on failure, fix it.
Signed-off-by: Axel Lin <axel.lin@ingics.com>
Acked-by : Santosh Shilimkar <santosh.shilimkar@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/memory/emif.c | 23 +++++++++++++++++------
1 file changed, 17 insertions(+), 6 deletions(-)
diff --git a/drivers/memory/emif.c b/drivers/memory/emif.c
index 1424ae38e53b..06d31c99e6ac 100644
--- a/drivers/memory/emif.c
+++ b/drivers/memory/emif.c
@@ -75,6 +75,7 @@ static unsigned long irq_state;
static u32 t_ck; /* DDR clock period in ps */
static LIST_HEAD(device_list);
+#ifdef CONFIG_DEBUG_FS
static void do_emif_regdump_show(struct seq_file *s, struct emif_data *emif,
struct emif_regs *regs)
{
@@ -166,23 +167,23 @@ static int __init_or_module emif_debugfs_init(struct emif_data *emif)
int ret;
dentry = debugfs_create_dir(dev_name(emif->dev), NULL);
- if (IS_ERR(dentry)) {
- ret = PTR_ERR(dentry);
+ if (!dentry) {
+ ret = -ENOMEM;
goto err0;
}
emif->debugfs_root = dentry;
dentry = debugfs_create_file("regcache_dump", S_IRUGO,
emif->debugfs_root, emif, &emif_regdump_fops);
- if (IS_ERR(dentry)) {
- ret = PTR_ERR(dentry);
+ if (!dentry) {
+ ret = -ENOMEM;
goto err1;
}
dentry = debugfs_create_file("mr4", S_IRUGO,
emif->debugfs_root, emif, &emif_mr4_fops);
- if (IS_ERR(dentry)) {
- ret = PTR_ERR(dentry);
+ if (!dentry) {
+ ret = -ENOMEM;
goto err1;
}
@@ -198,6 +199,16 @@ static void __exit emif_debugfs_exit(struct emif_data *emif)
debugfs_remove_recursive(emif->debugfs_root);
emif->debugfs_root = NULL;
}
+#else
+static inline int __init_or_module emif_debugfs_init(struct emif_data *emif)
+{
+ return 0;
+}
+
+static inline void __exit emif_debugfs_exit(struct emif_data *emif)
+{
+}
+#endif
/*
* Calculate the period of DDR clock from frequency value
--
2.30.9