From: Alan Stern Date: Wed, 11 Jul 2012 15:22:26 +0000 (-0400) Subject: USB: EHCI: use hrtimer for interrupt QH unlink X-Git-Tag: v3.6-rc1~101^2~37 X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=df2022553dd8d34d49e16c19d851ea619438f0ef;p=pandora-kernel.git USB: EHCI: use hrtimer for interrupt QH unlink This patch (as1577) adds hrtimer support for unlinking interrupt QHs in ehci-hcd. The current code relies on a fixed delay of either 2 or 55 us, which is not always adequate and in any case is totally bogus. Thanks to internal caching, the EHCI hardware may continue to access an interrupt QH for more than a millisecond after it has been unlinked. In fact, the EHCI spec doesn't say how long to wait before using an unlinked interrupt QH. The patch sets the delay to 9 microframes minimum, which ought to be adequate. Signed-off-by: Alan Stern Signed-off-by: Greg Kroah-Hartman --- Reading git-diff-tree failed