From: Ramachandra K Date: Fri, 27 Feb 2009 18:33:12 +0000 (-0800) Subject: IB/mad: Fix RMPP header RRespTime manipulation X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=7020cb0fe216fdcec246cdc2412614a3190fbb2f;p=linux-beck.git IB/mad: Fix RMPP header RRespTime manipulation Fix ib_set_rmpp_flags() to use the correct bit mask for RRespTime. In the 8-bit field of the RMPP header, the first 5 bits are RRespTime and next 3 bits are RMPPFlags. Hence to retain the first 5 bits, the mask should be 0xF8 instead of 0xF1. ack_recv()-->format_ack() calls ib_set_rmpp_flags() and due to the incorrect ANDing with 0xF1, RRespTime got changed incorrectly and RMPP Acks sent back always had a RRespTime of 0x1E (30) which caused the other end to consider the time outs to be approximately 4297 seconds (i.e. in the order of 4*2^30) instead of the usual ~4 seconds (order of 4*2^20). Signed-off-by: Ramachandra K Acked-by: Sean Hefty Signed-off-by: Roland Dreier --- diff --git a/include/rdma/ib_mad.h b/include/rdma/ib_mad.h index 5f6c40fffcf4..1a0f409f1700 100644 --- a/include/rdma/ib_mad.h +++ b/include/rdma/ib_mad.h @@ -290,7 +290,7 @@ static inline void ib_set_rmpp_resptime(struct ib_rmpp_hdr *rmpp_hdr, u8 rtime) */ static inline void ib_set_rmpp_flags(struct ib_rmpp_hdr *rmpp_hdr, u8 flags) { - rmpp_hdr->rmpp_rtime_flags = (rmpp_hdr->rmpp_rtime_flags & 0xF1) | + rmpp_hdr->rmpp_rtime_flags = (rmpp_hdr->rmpp_rtime_flags & 0xF8) | (flags & 0x7); }