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| author | Alexey Starikovskiy <astarikovskiy@suse.de> | 2009-02-21 12:18:13 -0500 |
|---|---|---|
| committer | Len Brown <len.brown@intel.com> | 2009-02-21 12:18:13 -0500 |
| commit | 5423a0cb3f74c16e90683f8ee1cec6c240a9556e (patch) | |
| tree | 593e726b51c42fe729841c8f6b9daf6429411395 /drivers/acpi/ec.c | |
| parent | d2f8d7ee1a9b4650b4e43325b321801264f7c37a (diff) | |
| download | linux-5423a0cb3f74c16e90683f8ee1cec6c240a9556e.tar.gz linux-5423a0cb3f74c16e90683f8ee1cec6c240a9556e.tar.bz2 linux-5423a0cb3f74c16e90683f8ee1cec6c240a9556e.zip | |
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>
Diffstat (limited to 'drivers/acpi/ec.c')
| -rw-r--r-- | drivers/acpi/ec.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/drivers/acpi/ec.c b/drivers/acpi/ec.c index 5c2f5d343be6..2fe15060dcdc 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)) { |