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memory: emif: Add ifdef CONFIG_DEBUG_FS guard for emif_debugfs_[init|exit]

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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>
This commit is contained in:
Axel Lin 2012-09-25 11:54:36 +08:00 committed by Greg Kroah-Hartman
parent 1980a347a7
commit e5445ee6a6
1 changed files with 17 additions and 6 deletions
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23
drivers/memory/emif.c
View file

@ -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