Logan Gunthorpe 4e5f2c2041 ntb_transport: fix bug calculating num_qps_mw ... commit 8e8496e0e9564b66165f5219a4e8ed20b0d3fc6b upstream. A divide by zero error occurs if qp_count is less than mw_count because num_qps_mw is calculated to be zero. The calculation appears to be incorrect. The requirement is for num_qps_mw to be set to qp_count / mw_count with any remainder divided among the earlier mws. For example, if mw_count is 5 and qp_count is 12 then mws 0 and 1 will have 3 qps per window and mws 2 through 4 will have 2 qps per window. Thus, when mw_num < qp_count % mw_count, num_qps_mw is 1 higher than when mw_num >= qp_count. Signed-off-by: Logan Gunthorpe <logang@deltatee.com> Fixes: e26a5843f7 ("NTB: Split ntb_hw_intel and ntb_transport drivers") Acked-by: Allen Hubbe <Allen.Hubbe@dell.com> Signed-off-by: Jon Mason <jdmason@kudzu.us> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2017-08-30 10:19:29 +02:00
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hw	NTB: unify translation addresses	2015-11-08 16:11:21 -05:00
test	NTB: Add tool test client	2015-07-04 14:08:17 -04:00
Kconfig	NTB: Add ping pong test client	2015-07-04 14:07:42 -04:00
Makefile	NTB: Add ping pong test client	2015-07-04 14:07:42 -04:00
ntb.c	ntb: avoid format string in dev_set_name	2015-08-09 16:32:22 -04:00
ntb_transport.c	ntb_transport: fix bug calculating num_qps_mw	2017-08-30 10:19:29 +02:00