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| author | Dmitry Torokhov <dtor@vmware.com> | 2011-03-23 22:41:23 -0700 |
|---|---|---|
| committer | Sarah Sharp <sarah.a.sharp@linux.intel.com> | 2011-04-13 16:19:48 -0700 |
| commit | dfa49c4ad120a784ef1ff0717168aa79f55a483a (patch) | |
| tree | d8dc009e82608aa2935d95ab07f50d7d3e3b7d9a /drivers/usb/serial/usb_debug.c | |
| parent | 926008c9386dde09b015753b6681c502177baa30 (diff) | |
| download | blackbird-op-linux-dfa49c4ad120a784ef1ff0717168aa79f55a483a.tar.gz blackbird-op-linux-dfa49c4ad120a784ef1ff0717168aa79f55a483a.zip | |
USB: xhci - fix math in xhci_get_endpoint_interval()
When parsing exponent-expressed intervals we subtract 1 from the
value and then expect it to match with original + 1, which is
highly unlikely, and we end with frequent spew:
usb 3-4: ep 0x83 - rounding interval to 512 microframes
Also, parsing interval for fullspeed isochronous endpoints was
incorrect - according to USB spec they use exponent-based
intervals (but xHCI spec claims frame-based intervals). I trust
USB spec more, especially since USB core agrees with it.
This should be queued for stable kernels back to 2.6.31.
Reviewed-by: Micah Elizabeth Scott <micah@vmware.com>
Signed-off-by: Dmitry Torokhov <dtor@vmware.com>
Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
Cc: stable@kernel.org
Diffstat (limited to 'drivers/usb/serial/usb_debug.c')
0 files changed, 0 insertions, 0 deletions
