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.