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scsi: snic: debugfs: remove local storage of debugfs files

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There is no need to keep the dentry around for the debugfs trace files,
as we can just look it up when we want to remove it later on.  Simplify
the structure by removing the dentries and relying on debugfs to find
the dentry to remove when we want to.

By doing this change, we remove the last in-kernel user that was storing
the result of debugfs_create_bool(), so that api can be cleaned up.

Cc: Karan Tilak Kumar <kartilak@cisco.com>
Cc: Sesidhar Baddela <sebaddel@cisco.com>
Cc: "James E.J. Bottomley" <jejb@linux.ibm.com>
Cc: "Martin K. Petersen" <martin.petersen@oracle.com>
Cc: <linux-scsi@vger.kernel.org>
Link: https://lore.kernel.org/r/20210518161625.3696996-1-gregkh@linuxfoundation.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Greg Kroah-Hartman 2021-05-18 18:16:25 +02:00
parent 77b98d456d
commit 1be4ec2456
2 changed files with 8 additions and 16 deletions
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21
drivers/scsi/snic/snic_debugfs.c
View file

@ -430,21 +430,19 @@ static const struct seq_operations snic_trc_sops = {
DEFINE_SEQ_ATTRIBUTE(snic_trc);
#define TRC_ENABLE_FILE "tracing_enable"
#define TRC_FILE "trace"
/*
* snic_trc_debugfs_init : creates trace/tracing_enable files for trace
* under debugfs
*/
void snic_trc_debugfs_init(void)
{
snic_glob->trc.trc_enable = debugfs_create_bool("tracing_enable",
S_IFREG | S_IRUGO | S_IWUSR,
snic_glob->trc_root,
&snic_glob->trc.enable);
debugfs_create_bool(TRC_ENABLE_FILE, S_IFREG | S_IRUGO | S_IWUSR,
snic_glob->trc_root, &snic_glob->trc.enable);
snic_glob->trc.trc_file = debugfs_create_file("trace",
S_IFREG | S_IRUGO | S_IWUSR,
snic_glob->trc_root, NULL,
&snic_trc_fops);
debugfs_create_file(TRC_FILE, S_IFREG | S_IRUGO | S_IWUSR,
snic_glob->trc_root, NULL, &snic_trc_fops);
}
/*
@ -453,9 +451,6 @@ void snic_trc_debugfs_init(void)
void
snic_trc_debugfs_term(void)
{
debugfs_remove(snic_glob->trc.trc_file);
snic_glob->trc.trc_file = NULL;
debugfs_remove(snic_glob->trc.trc_enable);
snic_glob->trc.trc_enable = NULL;
debugfs_remove(debugfs_lookup(TRC_FILE, snic_glob->trc_root));
debugfs_remove(debugfs_lookup(TRC_ENABLE_FILE, snic_glob->trc_root));
}

3
drivers/scsi/snic/snic_trc.h
View file

@ -46,9 +46,6 @@ struct snic_trc {
u32 rd_idx;
u32 wr_idx;
bool enable; /* Control Variable for Tracing */
struct dentry *trc_enable; /* debugfs file object */
struct dentry *trc_file;
};
int snic_trc_init(void);