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| author | Axel Lin <axel.lin@ingics.com> | 2012-09-25 11:54:36 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2012-09-26 13:56:03 -0700 |
| commit | e5445ee6a62329f6eb28b8ebd8ff4c4659ca0209 (patch) | |
| tree | d4c5166d5506c0051dc9b9e98ccde212a26d20a6 /drivers/memory/emif.c | |
| parent | 1980a347a71693a41663a1780c2da869174a0025 (diff) | |
| download | lwn-e5445ee6a62329f6eb28b8ebd8ff4c4659ca0209.tar.gz lwn-e5445ee6a62329f6eb28b8ebd8ff4c4659ca0209.zip | |
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>
Diffstat (limited to 'drivers/memory/emif.c')
| -rw-r--r-- | drivers/memory/emif.c | 23 |
1 files 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 |