This patch simplifies the fld_proc_hash_seq_write function
by removing the dynamic memory allocation.
The longest fh_name used so far in lustre is 4 characters.
We use a 8 bytes variable to be on the safe side.
Signed-off-by: Tristan Lelong <tris...@lelong.xyz>
---
Hi Greg,
This patch is a rework of "staging: lustre: fix sparse warning on
LPROC_SEQ_FOPS macros" v3.
It applies on top of your latest staging-testing branch.
Regards
---
drivers/staging/lustre/lustre/fld/lproc_fld.c | 13 ++++---------
1 file changed, 4 insertions(+), 9 deletions(-)
diff --git a/drivers/staging/lustre/lustre/fld/lproc_fld.c
b/drivers/staging/lustre/lustre/fld/lproc_fld.c
index 74b4db9..9b26bb5 100644
--- a/drivers/staging/lustre/lustre/fld/lproc_fld.c
+++ b/drivers/staging/lustre/lustre/fld/lproc_fld.c
@@ -93,17 +93,13 @@ fld_proc_hash_seq_write(struct file *file,
{
struct lu_client_fld *fld;
struct lu_fld_hash *hash = NULL;
- char *name;
+ char fh_name[8];
int i;
- if (count > 80)
+ if (count > sizeof(fh_name))
return -ENAMETOOLONG;
- name = kmalloc(count, GFP_KERNEL);
- if (!name)
- return -ENOMEM;
-
- if (copy_from_user(name, buffer, count) != 0)
+ if (copy_from_user(fh_name, buffer, count) != 0)
return -EFAULT;
fld = ((struct seq_file *)file->private_data)->private;
@@ -113,7 +109,7 @@ fld_proc_hash_seq_write(struct file *file,
if (count != strlen(fld_hash[i].fh_name))
continue;
- if (!strncmp(fld_hash[i].fh_name, name, count)) {
+ if (!strncmp(fld_hash[i].fh_name, fh_name, count)) {
hash = &fld_hash[i];
break;
}
@@ -128,7 +124,6 @@ fld_proc_hash_seq_write(struct file *file,
fld->lcf_name, hash->fh_name);
}
- kfree(name);
return count;
}
--
2.1.3
--
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