From c0d121720220584bba2876b032e58a076b843fa1 Mon Sep 17 00:00:00 2001 From: Dave Jiang Date: Thu, 19 Jul 2007 01:49:46 -0700 Subject: drivers/edac: add new nmi rescan Provides a way for NMI reported errors on x86 to notify the EDAC subsystem pending ECC errors by writing to a software state variable. Here's the reworked patch. I added an EDAC stub to the kernel so we can have variables that are in the kernel even if EDAC is a module. I also implemented the idea of using the chip driver to select error detection mode via module parameter and eliminate the kernel compile option. Please review/test. Thx! Also, I only made changes to some of the chipset drivers since I am unfamiliar with the other ones. We can add similar changes as we go. Signed-off-by: Dave Jiang Signed-off-by: Douglas Thompson Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- drivers/edac/edac_module.c | 24 ++++++++++++++++++++++-- 1 file changed, 22 insertions(+), 2 deletions(-) (limited to 'drivers/edac/edac_module.c') diff --git a/drivers/edac/edac_module.c b/drivers/edac/edac_module.c index 3cd3a236821c..89c96ecbf04e 100644 --- a/drivers/edac/edac_module.c +++ b/drivers/edac/edac_module.c @@ -1,6 +1,7 @@ #include #include +#include #include "edac_mc.h" #include "edac_module.h" @@ -101,6 +102,25 @@ static void do_edac_check(void) edac_pci_do_parity_check(); } +/* + * handler for EDAC to check if NMI type handler has asserted interrupt + */ +static int edac_assert_error_check_and_clear(void) +{ + int vreg; + + if(edac_op_state == EDAC_OPSTATE_POLL) + return 1; + + vreg = atomic_read(&edac_err_assert); + if(vreg) { + atomic_set(&edac_err_assert, 0); + return 1; + } + + return 0; +} + /* * Action thread for EDAC to perform the POLL operations */ @@ -109,8 +129,8 @@ static int edac_kernel_thread(void *arg) int msec; while (!kthread_should_stop()) { - - do_edac_check(); + if(edac_assert_error_check_and_clear()) + do_edac_check(); /* goto sleep for the interval */ msec = (HZ * edac_get_poll_msec()) / 1000; -- cgit v1.2.1