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scsi: zfcp: Clean up sysfs code for SFP diagnostics

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The error path from zfcp_adapter_enqueue() no longer attempts to remove the
diagnostics attributes if they haven't been created yet.

So remove the manual 'sysfs_established' guard for this case, and use
device_add_groups() to add all adapter-related sysfs attributes in one go.

Link: https://lore.kernel.org/r/37a97537f675d643006271f37723c346189b6eec.1618417667.git.bblock@linux.ibm.com
Reviewed-by: Benjamin Block <bblock@linux.ibm.com>
Reviewed-by: Steffen Maier <maier@linux.ibm.com>
Signed-off-by: Julian Wiedmann <jwi@linux.ibm.com>
Signed-off-by: Benjamin Block <bblock@linux.ibm.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Julian Wiedmann 2021-04-14 19:08:02 +02:00 committed by Martin K. Petersen
parent ab1fa88062
commit 20540a5645
5 changed files with 14 additions and 63 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

14
drivers/s390/scsi/zfcp_aux.c
View File

@ -413,12 +413,8 @@ struct zfcp_adapter *zfcp_adapter_enqueue(struct ccw_device *ccw_device)
dev_set_drvdata(&ccw_device->dev, adapter);
if (sysfs_create_group(&ccw_device->dev.kobj,
&zfcp_sysfs_adapter_attrs))
goto failed;
if (zfcp_diag_sysfs_setup(adapter))
goto err_diag_sysfs;
if (device_add_groups(&ccw_device->dev, zfcp_sysfs_adapter_attr_groups))
goto err_sysfs;
/* report size limit per scatter-gather segment */
adapter->ccw_device->dev.dma_parms = &adapter->dma_parms;
@ -427,8 +423,7 @@ struct zfcp_adapter *zfcp_adapter_enqueue(struct ccw_device *ccw_device)
return adapter;
err_diag_sysfs:
sysfs_remove_group(&ccw_device->dev.kobj, &zfcp_sysfs_adapter_attrs);
err_sysfs:
failed:
/* TODO: make this more fine-granular */
cancel_delayed_work_sync(&adapter->scan_work);
@ -460,8 +455,7 @@ void zfcp_adapter_unregister(struct zfcp_adapter *adapter)
zfcp_fc_wka_ports_force_offline(adapter->gs);
zfcp_scsi_adapter_unregister(adapter);
zfcp_diag_sysfs_destroy(adapter);
sysfs_remove_group(&cdev->dev.kobj, &zfcp_sysfs_adapter_attrs);
device_remove_groups(&cdev->dev, zfcp_sysfs_adapter_attr_groups);
zfcp_erp_thread_kill(adapter);
zfcp_dbf_adapter_unregister(adapter);

42
drivers/s390/scsi/zfcp_diag.c
View File

@ -10,8 +10,6 @@
#include <linux/spinlock.h>
#include <linux/jiffies.h>
#include <linux/string.h>
#include <linux/kernfs.h>
#include <linux/sysfs.h>
#include <linux/errno.h>
#include <linux/slab.h>
@ -79,46 +77,6 @@ void zfcp_diag_adapter_free(struct zfcp_adapter *const adapter)
adapter->diagnostics = NULL;
}
/**
* zfcp_diag_sysfs_setup() - Setup the sysfs-group for adapter-diagnostics.
* @adapter: target adapter to which the group should be added.
*
* Return: 0 on success; Something else otherwise (see sysfs_create_group()).
*/
int zfcp_diag_sysfs_setup(struct zfcp_adapter *const adapter)
{
int rc = sysfs_create_group(&adapter->ccw_device->dev.kobj,
&zfcp_sysfs_diag_attr_group);
if (rc == 0)
adapter->diagnostics->sysfs_established = 1;
return rc;
}
/**
* zfcp_diag_sysfs_destroy() - Remove the sysfs-group for adapter-diagnostics.
* @adapter: target adapter from which the group should be removed.
*/
void zfcp_diag_sysfs_destroy(struct zfcp_adapter *const adapter)
{
if (adapter->diagnostics == NULL ||
!adapter->diagnostics->sysfs_established)
return;
/*
* We need this state-handling so we can prevent warnings being printed
* on the kernel-console in case we have to abort a halfway done
* zfcp_adapter_enqueue(), in which the sysfs-group was not yet
* established. sysfs_remove_group() does this checking as well, but
* still prints a warning in case we try to remove a group that has not
* been established before
*/
adapter->diagnostics->sysfs_established = 0;
sysfs_remove_group(&adapter->ccw_device->dev.kobj,
&zfcp_sysfs_diag_attr_group);
}
/**
* zfcp_diag_update_xdata() - Update a diagnostics buffer.
* @hdr: the meta data to update.

7
drivers/s390/scsi/zfcp_diag.h
View File

@ -40,8 +40,6 @@ struct zfcp_diag_header {
/**
* struct zfcp_diag_adapter - central storage for all diagnostics concerning an
* adapter.
* @sysfs_established: flag showing that the associated sysfs-group was created
* during run of zfcp_adapter_enqueue().
* @max_age: maximum age of data in diagnostic buffers before they need to be
* refreshed (in ms).
* @port_data: data retrieved using exchange port data.
@ -52,8 +50,6 @@ struct zfcp_diag_header {
* @config_data.data: cached QTCB Bottom of command exchange config data.
*/
struct zfcp_diag_adapter {
u64 sysfs_established :1;
unsigned long max_age;
struct zfcp_diag_adapter_port_data {
@ -69,9 +65,6 @@ struct zfcp_diag_adapter {
int zfcp_diag_adapter_setup(struct zfcp_adapter *const adapter);
void zfcp_diag_adapter_free(struct zfcp_adapter *const adapter);
int zfcp_diag_sysfs_setup(struct zfcp_adapter *const adapter);
void zfcp_diag_sysfs_destroy(struct zfcp_adapter *const adapter);
void zfcp_diag_update_xdata(struct zfcp_diag_header *const hdr,
const void *const data, const bool incomplete);

4
drivers/s390/scsi/zfcp_ext.h
View File

@ -11,6 +11,7 @@
#define ZFCP_EXT_H
#include <linux/types.h>
#include <linux/sysfs.h>
#include <scsi/fc/fc_els.h>
#include "zfcp_def.h"
#include "zfcp_fc.h"
@ -179,13 +180,12 @@ extern void zfcp_scsi_shost_update_port_data(
const struct fsf_qtcb_bottom_port *const bottom);
/* zfcp_sysfs.c */
extern const struct attribute_group *zfcp_sysfs_adapter_attr_groups[];
extern const struct attribute_group *zfcp_unit_attr_groups[];
extern struct attribute_group zfcp_sysfs_adapter_attrs;
extern const struct attribute_group *zfcp_port_attr_groups[];
extern struct mutex zfcp_sysfs_port_units_mutex;
extern struct device_attribute *zfcp_sysfs_sdev_attrs[];
extern struct device_attribute *zfcp_sysfs_shost_attrs[];
extern const struct attribute_group zfcp_sysfs_diag_attr_group;
bool zfcp_sysfs_port_is_removing(const struct zfcp_port *const port);
/* zfcp_unit.c */

10
drivers/s390/scsi/zfcp_sysfs.c
View File

@ -435,7 +435,7 @@ static struct attribute *zfcp_adapter_attrs[] = {
NULL
};
struct attribute_group zfcp_sysfs_adapter_attrs = {
static const struct attribute_group zfcp_sysfs_adapter_attr_group = {
.attrs = zfcp_adapter_attrs,
};
@ -906,7 +906,13 @@ static struct attribute *zfcp_sysfs_diag_attrs[] = {
NULL,
};
const struct attribute_group zfcp_sysfs_diag_attr_group = {
static const struct attribute_group zfcp_sysfs_diag_attr_group = {
.name = "diagnostics",
.attrs = zfcp_sysfs_diag_attrs,
};
const struct attribute_group *zfcp_sysfs_adapter_attr_groups[] = {
&zfcp_sysfs_adapter_attr_group,
&zfcp_sysfs_diag_attr_group,
NULL,
};