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ACPI: EC: make kernel messages more useful when GPE storm is detected 

Make sure we can tell if the GPE storm workaround gets activated,
and avoid flooding the logs afterwards.

http://bugzilla.kernel.org/show_bug.cgi?id=11841
"plenty of line "ACPI: EC: non-query interrupt received,
 switching to interrupt mode" in dmesg"

Signed-off-by: Alan Jenkins <alan-jenkins@tuffmail.co.uk>
Acked-by: Alexey Starikovskiy <astarikovskiy@suse.de>
Signed-off-by: Len Brown <len.brown@intel.com>
This commit is contained in:
Alan Jenkins 2008-11-01 11:05:26 +00:00 committed by Len Brown
parent 1cfe62c801
commit f8248434e6
1 changed files with 10 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

13
drivers/acpi/ec.c
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@ -286,7 +286,8 @@ static int acpi_ec_transaction_unlocked(struct acpi_ec *ec,
acpi_enable_gpe(NULL, ec->gpe, ACPI_NOT_ISR);
} else if (test_bit(EC_FLAGS_GPE_MODE, &ec->flags) &&
t->irq_count > ACPI_EC_STORM_THRESHOLD) {
pr_debug(PREFIX "GPE storm detected\n");
pr_info(PREFIX "GPE storm detected, "
"transactions will use polling mode\n");
set_bit(EC_FLAGS_GPE_STORM, &ec->flags);
}
return ret;
@ -566,9 +567,15 @@ static u32 acpi_ec_gpe_handler(void *data)
if (!test_bit(EC_FLAGS_GPE_MODE, &ec->flags) &&
!test_bit(EC_FLAGS_NO_GPE, &ec->flags)) {
/* this is non-query, must be confirmation */
if (printk_ratelimit())
pr_info(PREFIX "non-query interrupt received,"
if (!test_bit(EC_FLAGS_GPE_STORM, &ec->flags)) {
if (printk_ratelimit())
pr_info(PREFIX "non-query interrupt received,"
" switching to interrupt mode\n");
} else {
/* hush, STORM switches the mode every transaction */
pr_debug(PREFIX "non-query interrupt received,"
" switching to interrupt mode\n");
}
set_bit(EC_FLAGS_GPE_MODE, &ec->flags);
}
return ACPI_INTERRUPT_HANDLED;