Commit 5423a0cb authored by Alexey Starikovskiy's avatar Alexey Starikovskiy Committed by Len Brown

ACPI: EC: Add delay for slow MSI controller

http://bugzilla.kernel.org/show_bug.cgi?id=12011Signed-off-by: default avatarAlexey Starikovskiy <astarikovskiy@suse.de>
Signed-off-by: default avatarLen Brown <len.brown@intel.com>
parent d2f8d7ee
......@@ -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)) {
......
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