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authorNicholas Bellinger <nab@linux-iscsi.org>2011-09-16 16:55:47 -0700
committerNicholas Bellinger <nab@linux-iscsi.org>2011-09-16 23:47:07 +0000
commit40b054970afcf067896d62cd6f7e617c62665304 (patch)
tree5596f2b4fa1c1f41f599caf21bd5d10681ab152b /mm/thrash.c
parent2ff017f5b4299e24a7f22d9a336dd162bf52bb54 (diff)
iscsi-target: Fix sendpage breakage with proper padding+DataDigest iovec offsets
This patch fixes a bug in the iscsit_fe_sendpage_sg() transmit codepath that was originally introduced with the v3.1 iscsi-target merge that incorrectly uses hardcoded cmd->iov_data_count values to determine cmd->iov_data[] offsets for extra outgoing padding and DataDigest payload vectors. This code is obviously incorrect for the DataDigest enabled case with sendpage offload, and this fix ensures correct operation for padding + DataDigest, padding only, and DataDigest only cases. The bug was introduced during a pre-merge change in iscsit_fe_sendpage_sg() to natively use struct scatterlist instead of the legacy v3.0 struct se_mem logic. Cc: Andy Grover <agrover@redhat.com> Cc: Christoph Hellwig <hch@lst.de> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
Diffstat (limited to 'mm/thrash.c')
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