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authorOliver Neukum <oliver@neukum.org>2008-06-20 13:25:57 +0400
committerGreg Kroah-Hartman <gregkh@suse.de>2008-07-22 02:16:36 +0400
commit11ea859d64b69a747d6b060b9ed1520eab1161fe (patch)
tree3b2de5ad788d145101762876e12c78c5b6383f93 /drivers/usb/class/cdc-acm.h
parent188d63602756bfd4aa1fb61d531dbd59bddac962 (diff)
downloadlinux-11ea859d64b69a747d6b060b9ed1520eab1161fe.tar.xz
USB: additional power savings for cdc-acm devices that support remote wakeup
this patch saves power for cdc-acm devices that support remote wakeup while the device is connected. - request needs_remote_wakeup when needed - delayed write while a device is autoresumed - the device is marked busy when appropriate Signed-off-by: Oliver Neukum <oneukum@suse.de> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/usb/class/cdc-acm.h')
-rw-r--r--drivers/usb/class/cdc-acm.h5
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/usb/class/cdc-acm.h b/drivers/usb/class/cdc-acm.h
index 046e064b033a..85c3aaaab7c5 100644
--- a/drivers/usb/class/cdc-acm.h
+++ b/drivers/usb/class/cdc-acm.h
@@ -107,10 +107,14 @@ struct acm {
struct list_head filled_read_bufs;
int write_used; /* number of non-empty write buffers */
int write_ready; /* write urb is not running */
+ int old_ready;
+ int processing;
+ int transmitting;
spinlock_t write_lock;
struct mutex mutex;
struct usb_cdc_line_coding line; /* bits, stop, parity */
struct work_struct work; /* work queue entry for line discipline waking up */
+ struct work_struct waker;
struct tasklet_struct urb_task; /* rx processing */
spinlock_t throttle_lock; /* synchronize throtteling and read callback */
unsigned int ctrlin; /* input control lines (DCD, DSR, RI, break, overruns) */
@@ -123,6 +127,7 @@ struct acm {
unsigned char clocal; /* termios CLOCAL */
unsigned int ctrl_caps; /* control capabilities from the class specific header */
unsigned int susp_count; /* number of suspended interfaces */
+ struct acm_wb *delayed_wb; /* write queued for a device about to be woken */
};
#define CDC_DATA_INTERFACE_TYPE 0x0a