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authorDavid Brownell <david-b@pacbell.net>2006-11-16 23:34:58 -0800
committerGreg Kroah-Hartman <gregkh@suse.de>2006-12-01 14:23:37 -0800
commit93f1a47c4af34c4ee014b3d2aae70089b3b69f72 (patch)
tree10e9b58f9b93cbbc0ab375778396632d465ce28e /fs/exportfs
parentf0d7f27351058284f62ab4848909373c2d1f5ce8 (diff)
USB: add ehci_hcd.ignore_oc parameter
Certain boards seem to like to issue false overcurrent notifications, for example on ports that don't have anything connected to them. This looks like a hardware error, at the level of noise to those ports' overcurrent input signals (or non-debounced VBUS comparators). This surfaces to users as truly massive amounts of syslog spam from khubd (which is appropriate for real hardware problems, except for the volume from multiple ports). Using this new "ignore_oc" flag helps such systems work more sanely, by preventing such indications from getting to khubd (and spam syslog). The downside is of course that true overcurrent errors will be masked; they'll appear as spontaneous disconnects, without the diagnostics that will let users troubleshoot issues like short circuited cables. Note that the bulk of these reports seem to be with VIA southbridges, but I think some were with Intel ones. Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
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