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[SCSI] fix SLUB WARN_ON

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We're getting a WARN_ON from SLUB indicating that we're trying to free
caches with in-use objects.  The root cause is a new dependency in the
command/sense free on unchecked_isa_dma.  The WARN_ON is caused by
drivers which change this in their setup after the command/sense cache
is allocated.

The fix is to move the allocation of this cache into scsi_add_host()
so things like gdth have an opportunity to modify it between alloc and
add (but *not* after).

The true fix would be to move unchecked_isa_dma into the template and
out of the host, so it because a truly read only variable.

Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
This commit is contained in:
James Bottomley 2008-04-21 10:57:20 -05:00
parent 582fb6c03a
commit 542bd1377a
1 changed files with 8 additions and 8 deletions
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16
drivers/scsi/hosts.c
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@ -199,9 +199,13 @@ int scsi_add_host(struct Scsi_Host *shost, struct device *dev)
if (!shost->can_queue) {
printk(KERN_ERR "%s: can_queue = 0 no longer supported\n",
sht->name);
goto out;
goto fail;
}
error = scsi_setup_command_freelist(shost);
if (error)
goto fail;
if (!shost->shost_gendev.parent)
shost->shost_gendev.parent = dev ? dev : &platform_bus;
@ -255,6 +259,8 @@ int scsi_add_host(struct Scsi_Host *shost, struct device *dev)
out_del_gendev:
device_del(&shost->shost_gendev);
out:
scsi_destroy_command_freelist(shost);
fail:
return error;
}
EXPORT_SYMBOL(scsi_add_host);
@ -381,10 +387,6 @@ struct Scsi_Host *scsi_host_alloc(struct scsi_host_template *sht, int privsize)
else
shost->dma_boundary = 0xffffffff;
rval = scsi_setup_command_freelist(shost);
if (rval)
goto fail_kfree;
device_initialize(&shost->shost_gendev);
snprintf(shost->shost_gendev.bus_id, BUS_ID_SIZE, "host%d",
shost->host_no);
@ -404,14 +406,12 @@ struct Scsi_Host *scsi_host_alloc(struct scsi_host_template *sht, int privsize)
"scsi_eh_%d", shost->host_no);
if (IS_ERR(shost->ehandler)) {
rval = PTR_ERR(shost->ehandler);
goto fail_destroy_freelist;
goto fail_kfree;
}
scsi_proc_hostdir_add(shost->hostt);
return shost;
fail_destroy_freelist:
scsi_destroy_command_freelist(shost);
fail_kfree:
kfree(shost);
return NULL;