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scsi: core: Remove Scsi_Host.shost_dev_attr_groups

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Simplify the scsi_host_alloc() implementation by setting the shost_class
.dev_groups member instead of copying all host attribute group pointers
into the shost_dev_attr_groups[] array.

Link: https://lore.kernel.org/r/20211116223115.2103031-1-bvanassche@acm.org
Cc: Steffen Maier <maier@linux.ibm.com>
Cc: Damien Le Moal <damien.lemoal@wdc.com>
Suggested-by: Benjamin Block <bblock@linux.ibm.com>
Reviewed-by: Damien Le Moal <damien.lemoal@opensource.wdc.com>
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Bart Van Assche 2021-11-16 14:31:15 -08:00 committed by Martin K. Petersen
parent 54d816d3d3
commit 0a84486d6c
4 changed files with 10 additions and 20 deletions
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15
drivers/scsi/hosts.c
View file

@ -61,6 +61,7 @@ static void scsi_host_cls_release(struct device *dev)
static struct class shost_class = {
.name = "scsi_host",
.dev_release = scsi_host_cls_release,
.dev_groups = scsi_shost_groups,
};
/**
@ -377,7 +378,7 @@ static struct device_type scsi_host_type = {
struct Scsi_Host *scsi_host_alloc(struct scsi_host_template *sht, int privsize)
{
struct Scsi_Host *shost;
int index, i, j = 0;
int index;
shost = kzalloc(sizeof(struct Scsi_Host) + privsize, GFP_KERNEL);
if (!shost)
@ -483,17 +484,7 @@ struct Scsi_Host *scsi_host_alloc(struct scsi_host_template *sht, int privsize)
shost->shost_dev.parent = &shost->shost_gendev;
shost->shost_dev.class = &shost_class;
dev_set_name(&shost->shost_dev, "host%d", shost->host_no);
shost->shost_dev.groups = shost->shost_dev_attr_groups;
shost->shost_dev_attr_groups[j++] = &scsi_shost_attr_group;
if (sht->shost_groups) {
for (i = 0; sht->shost_groups[i] &&
j < ARRAY_SIZE(shost->shost_dev_attr_groups);
i++, j++) {
shost->shost_dev_attr_groups[j] =
sht->shost_groups[i];
}
}
WARN_ON_ONCE(j >= ARRAY_SIZE(shost->shost_dev_attr_groups));
shost->shost_dev.groups = sht->shost_groups;
shost->ehandler = kthread_run(scsi_error_handler, shost,
"scsi_eh_%d", shost->host_no);

2
drivers/scsi/scsi_priv.h
View file

@ -144,7 +144,7 @@ extern struct scsi_transport_template blank_transport_template;
extern void __scsi_remove_device(struct scsi_device *);
extern struct bus_type scsi_bus_type;
extern const struct attribute_group scsi_shost_attr_group;
extern const struct attribute_group *scsi_shost_groups[];
/* scsi_netlink.c */
#ifdef CONFIG_SCSI_NETLINK

7
drivers/scsi/scsi_sysfs.c
View file

@ -424,10 +424,15 @@ static struct attribute *scsi_sysfs_shost_attrs[] = {
NULL
};
const struct attribute_group scsi_shost_attr_group = {
static const struct attribute_group scsi_shost_attr_group = {
.attrs = scsi_sysfs_shost_attrs,
};
const struct attribute_group *scsi_shost_groups[] = {
&scsi_shost_attr_group,
NULL
};
static void scsi_device_cls_release(struct device *class_dev)
{
struct scsi_device *sdev;

6
include/scsi/scsi_host.h
View file

@ -691,12 +691,6 @@ struct Scsi_Host {
/* ldm bits */
struct device shost_gendev, shost_dev;
/*
* The array size 3 provides space for one attribute group defined by
* the SCSI core, one attribute group defined by the SCSI LLD and one
* terminating NULL pointer.
*/
const struct attribute_group *shost_dev_attr_groups[3];
/*
* Points to the transport data (if any) which is allocated