Commit f8248434 authored by Alan Jenkins's avatar Alan Jenkins Committed by Len Brown

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: default avatarAlan Jenkins <alan-jenkins@tuffmail.co.uk>
Acked-by: default avatarAlexey Starikovskiy <astarikovskiy@suse.de>
Signed-off-by: default avatarLen Brown <len.brown@intel.com>
parent 1cfe62c8
...@@ -286,7 +286,8 @@ static int acpi_ec_transaction_unlocked(struct acpi_ec *ec, ...@@ -286,7 +286,8 @@ static int acpi_ec_transaction_unlocked(struct acpi_ec *ec,
acpi_enable_gpe(NULL, ec->gpe, ACPI_NOT_ISR); acpi_enable_gpe(NULL, ec->gpe, ACPI_NOT_ISR);
} else if (test_bit(EC_FLAGS_GPE_MODE, &ec->flags) && } else if (test_bit(EC_FLAGS_GPE_MODE, &ec->flags) &&
t->irq_count > ACPI_EC_STORM_THRESHOLD) { 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); set_bit(EC_FLAGS_GPE_STORM, &ec->flags);
} }
return ret; return ret;
...@@ -566,9 +567,15 @@ static u32 acpi_ec_gpe_handler(void *data) ...@@ -566,9 +567,15 @@ static u32 acpi_ec_gpe_handler(void *data)
if (!test_bit(EC_FLAGS_GPE_MODE, &ec->flags) && if (!test_bit(EC_FLAGS_GPE_MODE, &ec->flags) &&
!test_bit(EC_FLAGS_NO_GPE, &ec->flags)) { !test_bit(EC_FLAGS_NO_GPE, &ec->flags)) {
/* this is non-query, must be confirmation */ /* this is non-query, must be confirmation */
if (!test_bit(EC_FLAGS_GPE_STORM, &ec->flags)) {
if (printk_ratelimit()) if (printk_ratelimit())
pr_info(PREFIX "non-query interrupt received," pr_info(PREFIX "non-query interrupt received,"
" switching to interrupt mode\n"); " 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); set_bit(EC_FLAGS_GPE_MODE, &ec->flags);
} }
return ACPI_INTERRUPT_HANDLED; return ACPI_INTERRUPT_HANDLED;
......
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