From: Jon Mason Date: Fri, 6 Sep 2013 23:51:16 +0000 (-0700) Subject: NTB: Xeon Doorbell errata workaround X-Git-Tag: v3.13-rc2~28^2~8 X-Git-Url: https://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=c529aa30337b928bd6bc34293608cb3d4505856e;p=pandora-kernel.git NTB: Xeon Doorbell errata workaround Modifications to the 14th bit of the B2BDOORBELL register will not be mirrored to the remote system due to a hardware issue. To get around the issue, shrink the number of available doorbell bits by 1. The max number of doorbells was being used as a way to referencing the Link Doorbell bit. Since this would no longer work, the driver must now explicitly reference that bit. This does not affect the xeon_errata_workaround case, as it is not using the b2bdoorbell register. Signed-off-by: Jon Mason --- Reading git-diff-tree failed