hollalinux
/
linux-sg2042
mirror of https://github.com/sophgo/linux-riscv.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

nbd: Fix debugfs error handling 

Static checker complains about the implemented error handling. It is
indeed wrong. We don't care about the return values of created debugfs
files.

We only have to check the return values of created dirs for NULL
pointer. If we use a null pointer as parent directory for files, this
may lead to debugfs files in wrong places.

Signed-off-by: Markus Pargmann <mpa@pengutronix.de>
This commit is contained in:
Markus Pargmann 2015-10-24 21:15:34 +02:00
parent 92e963f50f
commit 27ea43fe2a
1 changed files with 14 additions and 41 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

55
drivers/block/nbd.c
View File

@ -892,50 +892,23 @@ static const struct file_operations nbd_dbg_flags_ops = {
static int nbd_dev_dbg_init(struct nbd_device *nbd)
{
struct dentry *dir;
struct dentry *f;
if (!nbd_dbg_dir)
return -EIO;
dir = debugfs_create_dir(nbd_name(nbd), nbd_dbg_dir);
if (IS_ERR_OR_NULL(dir)) {
dev_err(nbd_to_dev(nbd), "Failed to create debugfs dir for '%s' (%ld)\n",
nbd_name(nbd), PTR_ERR(dir));
return PTR_ERR(dir);
if (!dir) {
dev_err(nbd_to_dev(nbd), "Failed to create debugfs dir for '%s'\n",
nbd_name(nbd));
return -EIO;
}
nbd->dbg_dir = dir;
f = debugfs_create_file("tasks", 0444, dir, nbd, &nbd_dbg_tasks_ops);
if (IS_ERR_OR_NULL(f)) {
dev_err(nbd_to_dev(nbd), "Failed to create debugfs file 'tasks', %ld\n",
PTR_ERR(f));
return PTR_ERR(f);
}
f = debugfs_create_u64("size_bytes", 0444, dir, &nbd->bytesize);
if (IS_ERR_OR_NULL(f)) {
dev_err(nbd_to_dev(nbd), "Failed to create debugfs file 'size_bytes', %ld\n",
PTR_ERR(f));
return PTR_ERR(f);
}
f = debugfs_create_u32("timeout", 0444, dir, &nbd->xmit_timeout);
if (IS_ERR_OR_NULL(f)) {
dev_err(nbd_to_dev(nbd), "Failed to create debugfs file 'timeout', %ld\n",
PTR_ERR(f));
return PTR_ERR(f);
}
f = debugfs_create_u32("blocksize", 0444, dir, &nbd->blksize);
if (IS_ERR_OR_NULL(f)) {
dev_err(nbd_to_dev(nbd), "Failed to create debugfs file 'blocksize', %ld\n",
PTR_ERR(f));
return PTR_ERR(f);
}
f = debugfs_create_file("flags", 0444, dir, &nbd, &nbd_dbg_flags_ops);
if (IS_ERR_OR_NULL(f)) {
dev_err(nbd_to_dev(nbd), "Failed to create debugfs file 'flags', %ld\n",
PTR_ERR(f));
return PTR_ERR(f);
}
debugfs_create_file("tasks", 0444, dir, nbd, &nbd_dbg_tasks_ops);
debugfs_create_u64("size_bytes", 0444, dir, &nbd->bytesize);
debugfs_create_u32("timeout", 0444, dir, &nbd->xmit_timeout);
debugfs_create_u32("blocksize", 0444, dir, &nbd->blksize);
debugfs_create_file("flags", 0444, dir, &nbd, &nbd_dbg_flags_ops);
return 0;
}
@ -950,8 +923,8 @@ static int nbd_dbg_init(void)
struct dentry *dbg_dir;
dbg_dir = debugfs_create_dir("nbd", NULL);
if (IS_ERR(dbg_dir))
return PTR_ERR(dbg_dir);
if (!dbg_dir)
return -EIO;
nbd_dbg_dir = dbg_dir;