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authorLogan Gunthorpe <logang@deltatee.com>2017-12-18 21:25:05 +0300
committerJon Mason <jdmason@kudzu.us>2018-01-29 06:17:23 +0300
commitcbd27448faff4843ac4b66cc71445a10623ff48d (patch)
treece5495ed11a622a3939417aaeba655bf739a765a /lib/nodemask.c
parentc3840c7c3b7cfa55fcd50e9987af9a8db4fdf489 (diff)
downloadlinux-cbd27448faff4843ac4b66cc71445a10623ff48d.tar.xz
ntb_transport: Fix bug with max_mw_size parameter
When using the max_mw_size parameter of ntb_transport to limit the size of the Memory windows, communication cannot be established and the queues freeze. This is because the mw_size that's reported to the peer is correctly limited but the size used locally is not. So the MW is initialized with a buffer smaller than the window but the TX side is using the full window. This means the TX side will be writing to a region of the window that points nowhere. This is easily fixed by applying the same limit to tx_size in ntb_transport_init_queue(). Fixes: e26a5843f7f5 ("NTB: Split ntb_hw_intel and ntb_transport drivers") Signed-off-by: Logan Gunthorpe <logang@deltatee.com> Acked-by: Allen Hubbe <Allen.Hubbe@dell.com> Cc: Dave Jiang <dave.jiang@intel.com> Signed-off-by: Jon Mason <jdmason@kudzu.us>
Diffstat (limited to 'lib/nodemask.c')
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