From: Michael S. Tsirkin Date: Mon, 16 Apr 2007 14:04:55 +0000 (+0300) Subject: IB/mthca: Fix data corruption after FMR unmap on Sinai X-Git-Tag: v2.6.21~63^2 X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=608d8268be392444f825b4fc8fc7c8b509627129;p=pandora-kernel.git IB/mthca: Fix data corruption after FMR unmap on Sinai In mthca_arbel_fmr_unmap(), the high bits of the key are masked off. This gets rid of the effect of adjust_key(), which makes sure that bits 3 and 23 of the key are equal when the Sinai throughput optimization is enabled, and so it may happen that an FMR will end up with bits 3 and 23 in the key being different. This causes data corruption, because when enabling the throughput optimization, the driver promises the HCA firmware that bits 3 and 23 of all memory keys will always be equal. Fix by re-applying adjust_key() after masking the key. Thanks to Or Gerlitz for reproducing the problem, and Ariel Shahar for help in debug. Signed-off-by: Michael S. Tsirkin Signed-off-by: Roland Dreier --- Reading git-diff-tree failed