From: Eric W. Biederman <[EMAIL PROTECTED]> This patch disables interrupt generation from the legacy pic on reboot. Now that there is a sys_device class it should not be called while drivers are still using interrupts.
There is a report about this breaking ACPI power off on some systems. http://bugme.osdl.org/show_bug.cgi?id=4041 However the final comment seems to exhonorate this code. So until I get more information I believe that was a false positive. Signed-off-by: Eric Biederman <[EMAIL PROTECTED]> --- i8259.c | 12 ++++++++++++ 1 files changed, 12 insertions(+) diff -uNr linux-2.6.11-rc1-mm1-nokexec-x86_64-e820-64bit/arch/i386/kernel/i8259.c linux-2.6.11-rc1-mm1-nokexec-x86-i8259-shutdown/arch/i386/kernel/i8259.c --- linux-2.6.11-rc1-mm1-nokexec-x86_64-e820-64bit/arch/i386/kernel/i8259.c Fri Jan 14 04:32:22 2005 +++ linux-2.6.11-rc1-mm1-nokexec-x86-i8259-shutdown/arch/i386/kernel/i8259.c Tue Jan 18 22:44:27 2005 @@ -270,10 +270,22 @@ return 0; } +static int i8259A_shutdown(struct sys_device *dev) +{ + /* Put the i8259A into a quiescent state that + * the kernel initialization code can get it + * out of. + */ + outb(0xff, 0x21); /* mask all of 8259A-1 */ + outb(0xff, 0xA1); /* mask all of 8259A-1 */ + return 0; +} + static struct sysdev_class i8259_sysdev_class = { set_kset_name("i8259"), .suspend = i8259A_suspend, .resume = i8259A_resume, + .shutdown = i8259A_shutdown, }; static struct sys_device device_i8259A = { - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
