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[SCSI] save command pool address of Scsi_Host 

If a scsi host driver specifies .cmd_len in it's scsi_host_template, a driver's
private command pool is needed. scsi_find_host_cmd_pool() will locate it, but
scsi_alloc_host_cmd_pool() isn't saving the pool address in the host template.

This will result in an access error when the host is removed.

Avoid the problem by saving the address of a new allocated command pool where
it is expected.

Signed-off-by: Juergen Gross <jgross@suse.com>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Fixes: 89d9a56795
Cc: stable@vger.kernel.org
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
This commit is contained in:
Juergen Gross 2014-08-04 13:30:02 +02:00 committed by James Bottomley
parent 045065d8a3
commit f6105c0808
1 changed files with 10 additions and 2 deletions
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12
drivers/scsi/scsi.c
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@ -377,6 +377,10 @@ scsi_alloc_host_cmd_pool(struct Scsi_Host *shost)
pool->slab_flags |= SLAB_CACHE_DMA;
pool->gfp_mask = __GFP_DMA;
}
if (hostt->cmd_size)
hostt->cmd_pool = pool;
return pool;
}
@ -421,8 +425,10 @@ scsi_get_host_cmd_pool(struct Scsi_Host *shost)
out_free_slab:
kmem_cache_destroy(pool->cmd_slab);
out_free_pool:
if (hostt->cmd_size)
if (hostt->cmd_size) {
scsi_free_host_cmd_pool(pool);
hostt->cmd_pool = NULL;
}
goto out;
}
@ -444,8 +450,10 @@ static void scsi_put_host_cmd_pool(struct Scsi_Host *shost)
if (!--pool->users) {
kmem_cache_destroy(pool->cmd_slab);
kmem_cache_destroy(pool->sense_slab);
if (hostt->cmd_size)
if (hostt->cmd_size) {
scsi_free_host_cmd_pool(pool);
hostt->cmd_pool = NULL;
}
}
mutex_unlock(&host_cmd_pool_mutex);
}