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authorSarah Sharp <sarah.a.sharp@linux.intel.com>2012-02-13 14:42:11 -0800
committerSarah Sharp <sarah.a.sharp@linux.intel.com>2012-02-21 15:48:46 -0800
commit340a3504fd39dad753ba908fb6f894ee81fc3ae2 (patch)
tree304eb27f688f4420ce82b5689a1f1e74aab4ae0f /net/rds/rdma_transport.h
parenta45aa3b30583e7d54e7cf4fbcd0aa699348a6e5c (diff)
xhci: Fix encoding for HS bulk/control NAK rate.
The xHCI 0.96 spec says that HS bulk and control endpoint NAK rate must be encoded as an exponent of two number of microframes. The endpoint descriptor has the NAK rate encoded in number of microframes. We were just copying the value from the endpoint descriptor into the endpoint context interval field, which was not correct. This lead to the VIA host rejecting the add of a bulk OUT endpoint from any USB 2.0 mass storage device. The fix is to use the correct encoding. Refactor the code to convert number of frames to an exponential number of microframes, and make sure we convert the number of microframes in HS bulk and control endpoints to an exponent. This should be back ported to kernels as old as 2.6.31, that contain the commit dfa49c4ad120a784ef1ff0717168aa79f55a483a "USB: xhci - fix math in xhci_get_endpoint_interval" Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Tested-by: Felipe Contreras <felipe.contreras@gmail.com> Suggested-by: Andiry Xu <andiry.xu@amd.com> Cc: stable@vger.kernel.org
Diffstat (limited to 'net/rds/rdma_transport.h')
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