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| author | Alan Stern <stern@rowland.harvard.edu> | 2013-10-11 17:28:02 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-10-12 01:37:45 +0200 |
| commit | 63fb3a280061c5a1d9190015e5a074213f9d23c0 (patch) | |
| tree | d19fa5a572dfc898651194b3ab50848035cc423a /drivers/usb/host/ehci-sched.c | |
| parent | usb-anchor: Delay usb_wait_anchor_empty_timeout wake up till completion is done (diff) | |
| download | linux-63fb3a280061c5a1d9190015e5a074213f9d23c0.tar.xz linux-63fb3a280061c5a1d9190015e5a074213f9d23c0.zip | |
USB: NS_TO_US should round up
Host controller drivers use the NS_TO_US macro to convert transaction
times, which are computed in nanoseconds, to microseconds for
scheduling. Periodic scheduling requires worst-case estimates, but
the macro does its conversion using round-to-nearest. This patch
changes it to use round-up, giving a correct worst-case value.
Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/usb/host/ehci-sched.c')
0 files changed, 0 insertions, 0 deletions