Strange interrupt behaviour

Alan Cox (alan@lxorguk.ukuu.org.uk)
Thu, 9 Jul 1998 15:25:07 +0100 (BST)


I'm seeing some curious 2.1.x behaviour with an interrupt handler for
the Z85230 sync driver Im currently working on

If I make any user of save_flags/cli/restore_flags or the equivalent
spinlock_and_save* functions within the driver the instant it hits
the restore_flags it apparently re-enters the interrupt repeatedly
blows the entire stack and dies with an oops about 250 pages long

2.1.108 uniprocessor and tested on two different systems.

Alan

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.rutgers.edu