Wait queue question

If I have a wait queue thats I am using to wake up a device driver read
from an interrupt service routine.
If I get three interrupt and three wake_up_interrables, will I need to
execute three sleep_ons to get the wait queue back to the null state, or
is it just back after the first sleep_on?

Chip

Hi Ralph, perhaps you could not attach your .vcf files anymore?

If your driver implements non-blocking read() and write() functions, then you don't
have to sleep.
Else others have commented on the alternative to sleep_on().

For non-blocking:
Just use poll_wait() in your poll() function and wakeup_interruptible when there data
available on your Qs.
Then user program's select() and poll() system calls will work properly.

Ron

-----Original Message-----
From: owner-linuxppc-embedded@lists.linuxppc.org
[mailto:owner-linuxppc-embedded@lists.linuxppc.org]On Behalf Of Ralph
Blach
Sent: Wednesday, February 14, 2001 7:05 AM
To: Embedded Linux list
Subject: Wait queue question


If I have a wait queue thats I am using to wake up a device driver read
from an interrupt service routine.
If I get three interrupt and three wake_up_interrables, will I need to
execute three sleep_ons to get the wait queue back to the null state, or
is it just back after the first sleep_on?

Chip

** Sent via the linuxppc-embedded mail list. See http://lists.linuxppc.org/