mptctl_syscall_down - Down the MPT adapter syscall semaphore.
2. SYNOPSIS ▲
int mptctl_syscall_down(MPT_ADAPTER * ioc , int nonblock );
3. ARGUMENTS ▲
Pointer to MPT adapter
boolean, non-zero if O_NONBLOCK is set
4. 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.
5. COPYRIGHT ▲