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authorAlan Stern <stern@rowland.harvard.edu>2008-04-22 10:49:15 -0400
committerGreg Kroah-Hartman <gregkh@suse.de>2008-05-02 10:25:57 -0700
commitd8f12ab5d984761726e638a4222299a9fc516233 (patch)
treecaa034c93caa7f63f63e11e5634c847a48b2686f /drivers/usb/host/uhci-hcd.h
parent1b7b61c5d4071b9a25f6a9aae6f0a1e0efdbb2ae (diff)
USB: UHCI: disable remote wakeup when it's not needed
This patch (as1084b) fixes the way uhci-hcd handles polling and remote wakeups for its root hubs. When remote wakeup is disabled, neither interrupts nor polling should be enabled during a root-hub suspend. Likewise, if interrupts are enabled during suspend then polling isn't needed. Furthermore the EGSM (Enter Global Suspend Mode) bit shouldn't be set in the Command register unless remote wakeup is enabled. Apparently some controllers will issue a remote-wakeup interrupt whenever EGSM is on, even if Resume-Detect interrupts are supposedly disabled. Signed-off-by: Alan Stern <stern@rowland.harvard.edu> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/usb/host/uhci-hcd.h')
-rw-r--r--drivers/usb/host/uhci-hcd.h5
1 files changed, 3 insertions, 2 deletions
diff --git a/drivers/usb/host/uhci-hcd.h b/drivers/usb/host/uhci-hcd.h
index 340d6ed3e6e..7d01c5677f9 100644
--- a/drivers/usb/host/uhci-hcd.h
+++ b/drivers/usb/host/uhci-hcd.h
@@ -400,8 +400,9 @@ struct uhci_hcd {
unsigned int scan_in_progress:1; /* Schedule scan is running */
unsigned int need_rescan:1; /* Redo the schedule scan */
unsigned int dead:1; /* Controller has died */
- unsigned int working_RD:1; /* Suspended root hub doesn't
- need to be polled */
+ unsigned int RD_enable:1; /* Suspended root hub with
+ Resume-Detect interrupts
+ enabled */
unsigned int is_initialized:1; /* Data structure is usable */
unsigned int fsbr_is_on:1; /* FSBR is turned on */
unsigned int fsbr_is_wanted:1; /* Does any URB want FSBR? */