IB/ipath: Fix a race where s_last is updated without lock held

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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>

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Ralph Campbell 2007-10-19 15:04:10 -07:00 • committed by Roland Dreier

parent 96db0e0335

commit fffbfeaa68

1 changed files with 9 additions and 5 deletions

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drivers/infiniband/hw/ipath/ipath_ruc.c

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