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[SCSI] sd: Reshuffle init_sd to avoid crash 

scsi_register_driver will register a prep_fn() function, which
in turn migh need to use the sd_cdp_pool for DIF.
Which hasn't been initialised at this point, leading to
a crash. So reshuffle the init_sd() and exit_sd() paths
to have the driver registered last.

Signed-off-by: Joel D. Diaz <joeldiaz@us.ibm.com>
Signed-off-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
This commit is contained in:
Joel D. Diaz 2012-10-10 10:36:11 +02:00 committed by James Bottomley
parent 500c152afb
commit afd5e34b2b
1 changed files with 8 additions and 5 deletions
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13
drivers/scsi/sd.c
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@ -3116,10 +3116,6 @@ static int __init init_sd(void)
if (err)
goto err_out;
err = scsi_register_driver(&sd_template.gendrv);
if (err)
goto err_out_class;
sd_cdb_cache = kmem_cache_create("sd_ext_cdb", SD_EXT_CDB_SIZE,
0, 0, NULL);
if (!sd_cdb_cache) {
@ -3133,8 +3129,15 @@ static int __init init_sd(void)
goto err_out_cache;
}
err = scsi_register_driver(&sd_template.gendrv);
if (err)
goto err_out_driver;
return 0;
err_out_driver:
mempool_destroy(sd_cdb_pool);
err_out_cache:
kmem_cache_destroy(sd_cdb_cache);
@ -3157,10 +3160,10 @@ static void __exit exit_sd(void)
SCSI_LOG_HLQUEUE(3, printk("exit_sd: exiting sd driver\n"));
scsi_unregister_driver(&sd_template.gendrv);
mempool_destroy(sd_cdb_pool);
kmem_cache_destroy(sd_cdb_cache);
scsi_unregister_driver(&sd_template.gendrv);
class_unregister(&sd_disk_class);
for (i = 0; i < SD_MAJORS; i++)