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author | Jesse Keating <jkeating@redhat.com> | 2010-07-29 16:46:31 -0700 |
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committer | Jesse Keating <jkeating@redhat.com> | 2010-07-29 16:46:31 -0700 |
commit | 7a32965a104c3363e8505fe566531fcf071cced7 (patch) | |
tree | e45cb84552b2b022f49047bbddd9d887753c35bc /acpi-ec-add-delay-before-write.patch | |
parent | 64ba2e5ffde5f2418eb26c700cb0ab62b04e5013 (diff) | |
download | kernel-7a32965a104c3363e8505fe566531fcf071cced7.tar.gz kernel-7a32965a104c3363e8505fe566531fcf071cced7.tar.xz kernel-7a32965a104c3363e8505fe566531fcf071cced7.zip |
initial srpm import
Diffstat (limited to 'acpi-ec-add-delay-before-write.patch')
-rw-r--r-- | acpi-ec-add-delay-before-write.patch | 52 |
1 files changed, 52 insertions, 0 deletions
diff --git a/acpi-ec-add-delay-before-write.patch b/acpi-ec-add-delay-before-write.patch new file mode 100644 index 000000000..af49cccbd --- /dev/null +++ b/acpi-ec-add-delay-before-write.patch @@ -0,0 +1,52 @@ +https://bugzilla.kernel.org/show_bug.cgi?id=14733#c41 + +diff --git a/drivers/acpi/ec.c b/drivers/acpi/ec.c +index 27e0b92..09fbb69 100644 +--- a/drivers/acpi/ec.c ++++ b/drivers/acpi/ec.c +@@ -226,6 +226,7 @@ static int ec_poll(struct acpi_ec *ec) + if (ec_transaction_done(ec)) + return 0; + } else { ++ msleep(1); + if (wait_event_timeout(ec->wait, + ec_transaction_done(ec), + msecs_to_jiffies(1))) +@@ -233,8 +234,8 @@ static int ec_poll(struct acpi_ec *ec) + } + advance_transaction(ec, acpi_ec_read_status(ec)); + } while (time_before(jiffies, delay)); +- if (acpi_ec_read_status(ec) & ACPI_EC_FLAG_IBF) +- break; ++// if (acpi_ec_read_status(ec) & ACPI_EC_FLAG_IBF) ++// break; + pr_debug(PREFIX "controller reset, restart transaction\n"); + spin_lock_irqsave(&ec->curr_lock, flags); + start_transaction(ec); +@@ -271,15 +272,25 @@ static int ec_check_ibf0(struct acpi_ec *ec) + return (status & ACPI_EC_FLAG_IBF) == 0; + } + ++/* try to clean input buffer with burst_disable transaction */ ++static int acpi_ec_clean_buffer(struct acpi_ec *ec) ++{ ++ struct transaction t = {.command = ACPI_EC_BURST_DISABLE, ++ .wdata = NULL, .rdata = NULL, ++ .wlen = 0, .rlen = 0}; ++ return acpi_ec_transaction_unlocked(ec, &t); ++} ++ + static int ec_wait_ibf0(struct acpi_ec *ec) + { ++ + unsigned long delay = jiffies + msecs_to_jiffies(ACPI_EC_DELAY); + /* interrupt wait manually if GPE mode is not active */ + while (time_before(jiffies, delay)) + if (wait_event_timeout(ec->wait, ec_check_ibf0(ec), + msecs_to_jiffies(1))) + return 0; +- return -ETIME; ++ return acpi_ec_clean_buffer(ec); + } + + static int acpi_ec_transaction(struct acpi_ec *ec, struct transaction *t) |