SG: work with the SCSI fixed maximum allocations.
commit7cedb1f17fb7f4374d11501f61656ae9d3ba47e9
authorJames Bottomley <James.Bottomley@HansenPartnership.com>
Sun, 13 Jan 2008 20:15:28 +0000 (13 14:15 -0600)
committerJens Axboe <jens.axboe@oracle.com>
Mon, 28 Jan 2008 09:54:49 +0000 (28 10:54 +0100)
treed6257751445618b827c3e41e5b8fde2704c9d716
parent5ed7959ede0936c55e50421a53f153b17080e876
SG: work with the SCSI fixed maximum allocations.

SCSI sg table allocation has a maximum size (of SCSI_MAX_SG_SEGMENTS,
currently 128) and this will cause a BUG_ON() in SCSI if something
tries an allocation over it.  This patch adds a size limit to the
chaining allocator to allow the specification of the maximum
allocation size for chaining, so we always chain in units of the
maximum SCSI allocation size.

Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
drivers/scsi/scsi_lib.c
include/linux/scatterlist.h
lib/scatterlist.c