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authorRafael J. Wysocki <rjw@sisk.pl>2011-02-09 01:40:37 +0300
committerRafael J. Wysocki <rjw@sisk.pl>2011-02-24 21:58:53 +0300
commit5190726765b40774c069e187a958e10ccd970e65 (patch)
tree6cdfc76171e907232f91e4a094ee8ffbcc8e9797 /include/acpi
parent2aa15890f3c191326678f1bd68af61ec6b8753ec (diff)
downloadlinux-5190726765b40774c069e187a958e10ccd970e65.tar.xz
ACPI: Remove the wakeup.run_wake_count device field
The wakeup.run_wake_count ACPI device field is only used by the PCI runtime PM code to "protect" devices from being prepared for generating wakeup signals more than once in a row. However, it really doesn't provide any protection, because (1) all of the functions it is supposed to protect use their own reference counters effectively ensuring that the device will be set up for generating wakeup signals just once and (2) the PCI runtime PM code uses wakeup.run_wake_count in a racy way, since nothing prevents acpi_dev_run_wake() from being called concurrently from two different threads for the same device. Remove the wakeup.run_wake_count ACPI device field which is unnecessary, confusing and used in a wrong way. Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Diffstat (limited to 'include/acpi')
-rw-r--r--include/acpi/acpi_bus.h1
1 files changed, 0 insertions, 1 deletions
diff --git a/include/acpi/acpi_bus.h b/include/acpi/acpi_bus.h
index 78ca429929f7..f50ebb9bc53b 100644
--- a/include/acpi/acpi_bus.h
+++ b/include/acpi/acpi_bus.h
@@ -250,7 +250,6 @@ struct acpi_device_wakeup {
struct acpi_handle_list resources;
struct acpi_device_wakeup_flags flags;
int prepare_count;
- int run_wake_count;
};
/* Device */