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authorAlexey Starikovskiy <astarikovskiy@suse.de>2009-02-21 12:18:13 -0500
committerLen Brown <len.brown@intel.com>2009-02-21 12:18:13 -0500
commit5423a0cb3f74c16e90683f8ee1cec6c240a9556e (patch)
tree593e726b51c42fe729841c8f6b9daf6429411395
parentd2f8d7ee1a9b4650b4e43325b321801264f7c37a (diff)
downloadlinux-2.6.38-lt-ux500-5423a0cb3f74c16e90683f8ee1cec6c240a9556e.tar.gz
ACPI: EC: Add delay for slow MSI controller
http://bugzilla.kernel.org/show_bug.cgi?id=12011 Signed-off-by: Alexey Starikovskiy <astarikovskiy@suse.de> Signed-off-by: Len Brown <len.brown@intel.com>
-rw-r--r--drivers/acpi/ec.c9
1 files changed, 9 insertions, 0 deletions
diff --git a/drivers/acpi/ec.c b/drivers/acpi/ec.c
index 5c2f5d343be..2fe15060dcd 100644
--- a/drivers/acpi/ec.c
+++ b/drivers/acpi/ec.c
@@ -120,6 +120,8 @@ static struct acpi_ec {
spinlock_t curr_lock;
} *boot_ec, *first_ec;
+static int EC_FLAGS_MSI; /* Out-of-spec MSI controller */
+
/* --------------------------------------------------------------------------
Transaction Management
-------------------------------------------------------------------------- */
@@ -259,6 +261,8 @@ static int acpi_ec_transaction_unlocked(struct acpi_ec *ec,
clear_bit(EC_FLAGS_GPE_MODE, &ec->flags);
acpi_disable_gpe(NULL, ec->gpe);
}
+ if (EC_FLAGS_MSI)
+ udelay(ACPI_EC_DELAY);
/* start transaction */
spin_lock_irqsave(&ec->curr_lock, tmp);
/* following two actions should be kept atomic */
@@ -967,6 +971,11 @@ int __init acpi_ec_ecdt_probe(void)
/*
* Generate a boot ec context
*/
+ if (dmi_name_in_vendors("Micro-Star") ||
+ dmi_name_in_vendors("Notebook")) {
+ pr_info(PREFIX "Enabling special treatment for EC from MSI.\n");
+ EC_FLAGS_MSI = 1;
+ }
status = acpi_get_table(ACPI_SIG_ECDT, 1,
(struct acpi_table_header **)&ecdt_ptr);
if (ACPI_SUCCESS(status)) {