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| author | Alan Jenkins <alan-jenkins@tuffmail.co.uk> | 2008-11-01 11:05:26 +0000 |
|---|---|---|
| committer | Len Brown <len.brown@intel.com> | 2008-11-11 18:34:06 -0500 |
| commit | f8248434e6a11d7cd314281be3b39bbcf82fc243 (patch) | |
| tree | c056e1185944da12dd31a74ee280a89989764ec7 /drivers/acpi | |
| parent | 1cfe62c8010ac56e1bd3827e30386a87cc2f3594 (diff) | |
| download | kernel_samsung_crespo-f8248434e6a11d7cd314281be3b39bbcf82fc243.zip kernel_samsung_crespo-f8248434e6a11d7cd314281be3b39bbcf82fc243.tar.gz kernel_samsung_crespo-f8248434e6a11d7cd314281be3b39bbcf82fc243.tar.bz2 | |
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>
Diffstat (limited to 'drivers/acpi')
| -rw-r--r-- | drivers/acpi/ec.c | 13 |
1 files changed, 10 insertions, 3 deletions
diff --git a/drivers/acpi/ec.c b/drivers/acpi/ec.c index 3ef5b79..b340e08 100644 --- a/drivers/acpi/ec.c +++ b/drivers/acpi/ec.c @@ -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; |