tree 66e2c489dbeecf7405ac0d494af9e8ab6f593ed3
parent 609dc44b9a8616d7d7091ef7fe62a999e54f3cc2
author nagalakshmi.nandigama@lsi.com <nagalakshmi.nandigama@lsi.com> 1332225251 +0530
committer James Bottomley <JBottomley@Parallels.com> 1335205616 +0100

[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>