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| author | Joel D. Diaz <joeldiaz@us.ibm.com> | 2012-10-10 10:36:11 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-01-27 20:47:44 -0800 |
| commit | af22aff300fc5d70db97e1d551a0f2d1408027be (patch) | |
| tree | c8f3ef1708afad9a1cc782a404a10dbf05dbd863 | |
| parent | 462434eff40df54e9d5d1b5f8f21383fb382805c (diff) | |
| download | lwn-af22aff300fc5d70db97e1d551a0f2d1408027be.tar.gz lwn-af22aff300fc5d70db97e1d551a0f2d1408027be.zip | |
SCSI: sd: Reshuffle init_sd to avoid crash
commit afd5e34b2bb34881d3a789e62486814a49b47faa upstream.
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>
Cc: CAI Qian <caiqian@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/scsi/sd.c | 13 |
1 files changed, 8 insertions, 5 deletions
diff --git a/drivers/scsi/sd.c b/drivers/scsi/sd.c index a239382b2bdd..5b3cadbffcfc 100644 --- a/drivers/scsi/sd.c +++ b/drivers/scsi/sd.c @@ -2919,10 +2919,6 @@ 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) { @@ -2936,8 +2932,15 @@ 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); @@ -2960,10 +2963,10 @@ 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++) |