tree 440c6dc95990989c80eaeac571a01c88efce3d7a
parent 52bb8c626e0e5526c72b6ad17f1381f0bad283cc
author Bart Van Assche <bart.vanassche@sandisk.com> 1474919929 -0700
committer Doug Ledford <dledford@redhat.com> 1475873679 -0400

IB/srp: Fix infinite loop when FMR sg[0].offset != 0

Avoid that mapping an sg-list in which the first element has a
non-zero offset triggers an infinite loop when using FMR. This
patch makes the FMR mapping code similar to that of ib_sg_to_pages().

Note: older Mellanox HCAs do not support non-zero offsets for FMR.
See also commit 8c4037b501ac ("IB/srp: always avoid non-zero offsets
into an FMR").

Reported-by: Alex Estrin <alex.estrin@intel.com>
Signed-off-by: Bart Van Assche <bart.vanassche@sandisk.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Doug Ledford <dledford@redhat.com>