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(parent: 96db0e0) | patch
IB/ipath: Fix a race where s_last is updated without lock held
authorRalph Campbell <ralph.campbell@qlogic.com>
Fri, 19 Oct 2007 22:04:10 +0000 (15:04 -0700)
committerRoland Dreier <rolandd@cisco.com>
Tue, 30 Oct 2007 17:57:24 +0000 (10:57 -0700)
commitfffbfeaa680e2b87a591e141f2aa7e9e91184956
tree6a087d79165f626e6ad13dddf4dfb17ba128d1f4tree | snapshot (tar.gz zip)
parent96db0e0335c7981911bd7efc5c79e82d2358c0fccommit | diff
IB/ipath: Fix a race where s_last is updated without lock held

There is a small window where a send work queue entry could be
overwritten by ib_post_send() because s_last is updated before the
entry is read.

This patch closes the window by acquiring the lock and updating
the last send work queue entry index after reading the wr_id.

Signed-off-by: Ralph Campbell <ralph.campbell@qlogic.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
drivers/infiniband/hw/ipath/ipath_ruc.c diff | blob | blame | history