]> git.baikalelectronics.ru Git - kernel.git/commit
[SCSI] mpt2sas: Removed redundant global mutex for IOCTLs
authornagalakshmi.nandigama@lsi.com <nagalakshmi.nandigama@lsi.com>
Tue, 20 Mar 2012 06:34:11 +0000 (12:04 +0530)
committerJames Bottomley <JBottomley@Parallels.com>
Mon, 23 Apr 2012 18:26:56 +0000 (19:26 +0100)
commit6958afb14e21b3ba47828da08969da10af78ea21
tree66e2c489dbeecf7405ac0d494af9e8ab6f593ed3
parentb5347636226556d58aa7edccbc79f25fe707c795
[SCSI] mpt2sas: Removed redundant global mutex for IOCTLs

When the lock_kernel and unlock_kernel routines were removed in the
2.6.39 kernel, a global mutex was added on top of the existing mutex
which already existed. With this implementation, only one IOCTL
will be active at any time no matter how many ever controllers
are present. This causes poor performance.

Removed the global mutex so that the driver can work with the existing
semaphore that was already part of the existing code.

Signed-off-by: Nagalakshmi Nandigama <nagalakshmi.nandigama@lsi.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
drivers/scsi/mpt2sas/mpt2sas_ctl.c