| commit | 61e8b858abe38c1042135065c59f7d339194b50b | |
| author | Alan Stern <stern@rowland.harvard.edu> | |
| Mon, 9 Apr 2007 15:52:31 +0000 (9 11:52 -0400) | ||
| committer | Greg Kroah-Hartman <gregkh@suse.de> | |
| Wed, 11 Apr 2007 17:44:15 +0000 (11 10:44 -0700) | ||
| tree | db0d72775394b25ed3e80b2ce423424cbfefa1ee | treesnapshot (tar.gz zip) |
| parent | 5ab7ffea520948115a51a9931e1bb4c818aa8e35 | commitdiff |
EHCI: fix remote wakeup regression in 2.6.21-rc
There is one significant difference between the behavior of root hubs
(as embodied in host controller hardware) and external hubs: When a
remote-wakeup signal is received, an external hub sends an interrupt
message at the _end_ of the resume sequence but a root hub generates
and interrupt at the _beginning_ of the resume sequence. The host
system must poll for the end of the sequence.
When ehci-hcd was converted to interrupt-driven operation instead of
using polling, the remaining need for this particular poll was
overlooked. This patch (as894) fixes the problem.
Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
There is one significant difference between the behavior of root hubs
(as embodied in host controller hardware) and external hubs: When a
remote-wakeup signal is received, an external hub sends an interrupt
message at the _end_ of the resume sequence but a root hub generates
and interrupt at the _beginning_ of the resume sequence. The host
system must poll for the end of the sequence.
When ehci-hcd was converted to interrupt-driven operation instead of
using polling, the remaining need for this particular poll was
overlooked. This patch (as894) fixes the problem.
Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
| drivers/usb/host/ehci-hcd.c | diffblobblamehistory |