From 3eea123df1637a88d0899626a67b83dca959efff Mon Sep 17 00:00:00 2001 From: Henrique de Moraes Holschuh Date: Sun, 23 Sep 2007 11:39:04 -0300 Subject: [PATCH] ACPI: thinkpad-acpi: dequeue all pending hot key events at once (v2.2) Receive all pending HKEY events at once from a single notification, and don't complain if the queue is empty. Signed-off-by: Henrique de Moraes Holschuh Signed-off-by: Len Brown --- drivers/misc/thinkpad_acpi.c | 51 ++++++++++++++++++++++++------------ 1 file changed, 34 insertions(+), 17 deletions(-) diff --git a/drivers/misc/thinkpad_acpi.c b/drivers/misc/thinkpad_acpi.c index 9a611402ee9d..3efe81b1b73c 100644 --- a/drivers/misc/thinkpad_acpi.c +++ b/drivers/misc/thinkpad_acpi.c @@ -1196,9 +1196,30 @@ static void hotkey_notify(struct ibm_struct *ibm, u32 event) { u32 hkey; unsigned int keycode, scancode; - int send_acpi_ev = 0; + int send_acpi_ev; + + if (event != 0x80) { + printk(IBM_ERR "unknown HKEY notification event %d\n", event); + /* forward it to userspace, maybe it knows how to handle it */ + acpi_bus_generate_netlink_event(ibm->acpi->device->pnp.device_class, + ibm->acpi->device->dev.bus_id, + event, 0); + return; + } + + while (1) { + if (!acpi_evalf(hkey_handle, &hkey, "MHKP", "d")) { + printk(IBM_ERR "failed to retrieve HKEY event\n"); + return; + } + + if (hkey == 0) { + /* queue empty */ + return; + } + + send_acpi_ev = 0; - if (event == 0x80 && acpi_evalf(hkey_handle, &hkey, "MHKP", "d")) { switch (hkey >> 12) { case 1: /* 0x1000-0x1FFF: key presses */ @@ -1220,8 +1241,8 @@ static void hotkey_notify(struct ibm_struct *ibm, u32 event) * eat up known LID events */ if (hkey != 0x5001 && hkey != 0x5002) { printk(IBM_ERR - "unknown LID-related hotkey event: 0x%04x\n", - hkey); + "unknown LID-related HKEY event: 0x%04x\n", + hkey); send_acpi_ev = 1; } break; @@ -1240,21 +1261,17 @@ static void hotkey_notify(struct ibm_struct *ibm, u32 event) printk(IBM_NOTICE "unhandled HKEY event 0x%04x\n", hkey); send_acpi_ev = 1; } - } else { - printk(IBM_ERR "unknown hotkey notification event %d\n", event); - hkey = 0; - send_acpi_ev = 1; - } - /* Legacy events */ - if (send_acpi_ev || hotkey_report_mode < 2) - acpi_bus_generate_proc_event(ibm->acpi->device, event, hkey); + /* Legacy events */ + if (send_acpi_ev || hotkey_report_mode < 2) + acpi_bus_generate_proc_event(ibm->acpi->device, event, hkey); - /* netlink events */ - if (send_acpi_ev) { - acpi_bus_generate_netlink_event(ibm->acpi->device->pnp.device_class, - ibm->acpi->device->dev.bus_id, - event, hkey); + /* netlink events */ + if (send_acpi_ev) { + acpi_bus_generate_netlink_event(ibm->acpi->device->pnp.device_class, + ibm->acpi->device->dev.bus_id, + event, hkey); + } } } -- 2.39.2