From: Joel D. Diaz Date: Wed, 10 Oct 2012 08:36:11 +0000 (+0200) Subject: SCSI: sd: Reshuffle init_sd to avoid crash X-Git-Tag: v3.0.61~11 X-Git-Url: https://git.kernelconcepts.de/?a=commitdiff_plain;h=0aa31f182374b77a4b704585605ee35a642826cf;hp=27b2a263fa42cbad0fb33da2de30e4bbc380c43f;p=karo-tx-linux.git 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 Signed-off-by: Hannes Reinecke Signed-off-by: James Bottomley Cc: CAI Qian Signed-off-by: Greg Kroah-Hartman --- diff --git a/drivers/scsi/sd.c b/drivers/scsi/sd.c index 7d8b5d8d7499..515ec6d64fb4 100644 --- a/drivers/scsi/sd.c +++ b/drivers/scsi/sd.c @@ -2826,10 +2826,6 @@ 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) { @@ -2843,8 +2839,15 @@ 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); @@ -2867,10 +2870,10 @@ 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++)