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| author | Dmitry Torokhov <dtor@vmware.com> | 2011-03-23 22:41:23 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2011-04-21 14:32:57 -0700 |
| commit | b9d75083e022102b4f24dd0f8ebaa14ab4568bbf (patch) | |
| tree | de1856d869ac113e00957ebb09ca99b54c763387 /lib/dynamic_debug.c | |
| parent | 879d2ccad7347a306adaf8bf90c4146d91a4ea7e (diff) | |
USB: xhci - fix math in xhci_get_endpoint_interval()
commit dfa49c4ad120a784ef1ff0717168aa79f55a483a upstream.
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>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'lib/dynamic_debug.c')
0 files changed, 0 insertions, 0 deletions