mptctl_syscall_down(9)
NAME
mptctl_syscall_down - Down the MPT adapter syscall semaphore.
SYNOPSIS
int mptctl_syscall_down(MPT_ADAPTER * ioc, int nonblock);
ARGUMENTS
- ioc
- Pointer to MPT adapter
- nonblock
- boolean, non-zero if O_NONBLOCK is set
DESCRIPTION
All of the ioctl commands can potentially sleep, which is illegal with
a spinlock held, thus we perform mutual exclusion here.
Returns negative errno on error, or zero for success.