tree c29aff97085d9426dffe1e648e09d4aca0ead024
parent c59a3da1342ff456e5123361739bc331446cda21
author Roland Dreier <rolandd@cisco.com> 1166220109 -0800
committer Roland Dreier <rolandd@cisco.com> 1166220109 -0800

IB/srp: Fix FMR mapping for 32-bit kernels and addresses above 4G

struct srp_device.fmr_page_mask was unsigned long, which means that
the top part of addresses above 4G was being chopped off on 32-bit
architectures.  Of course nothing good happens when data from SRP
targets is DMAed to the wrong place.

Fix this by changing fmr_page_mask to u64, to match the addresses
actually used by IB devices.

Thanks to Brian Cain <Brian.Cain@ge.com> and David McMillen
<davem@systemfabricworks.com> for help diagnosing the bug and testing
the fix.

Signed-off-by: Roland Dreier <rolandd@cisco.com>