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| author | Nicholas Bellinger <nab@linux-iscsi.org> | 2014-02-23 12:52:44 +0000 |
|---|---|---|
| committer | Nicholas Bellinger <nab@linux-iscsi.org> | 2014-02-23 16:19:23 -0800 |
| commit | 10762e80489e73e2d52bf78e0869f253f42821bd (patch) | |
| tree | 93a5e8ef29aa4bcffca00e8839ca87a103441075 /drivers/target | |
| parent | 84197a36e9d78213da17b96fb838afcca4e150ea (diff) | |
| download | linux-10762e80489e73e2d52bf78e0869f253f42821bd.tar.gz linux-10762e80489e73e2d52bf78e0869f253f42821bd.tar.bz2 linux-10762e80489e73e2d52bf78e0869f253f42821bd.zip | |
target/sbc: Fix sbc_dif_copy_prot addr offset bug
This patch fixes a bug in sbc_dif_copy_prot() where the updated addr
offset did not take into account the case where the associated
scatterlist had not been incremented.
This addresses the case where incoming protection scatterlists may
contain a length smaller than PAGE_SIZE across multiple entires,
when the target protection scatterlists are always being explicitly
filled up to PAGE_SIZE before adding another entry.
Cc: Martin K. Petersen <martin.petersen@oracle.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Hannes Reinecke <hare@suse.de>
Cc: Sagi Grimberg <sagig@mellanox.com>
Cc: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
Diffstat (limited to 'drivers/target')
| -rw-r--r-- | drivers/target/target_core_sbc.c | 5 |
1 files changed, 2 insertions, 3 deletions
diff --git a/drivers/target/target_core_sbc.c b/drivers/target/target_core_sbc.c index a4489444ffbc..ef1a58a134aa 100644 --- a/drivers/target/target_core_sbc.c +++ b/drivers/target/target_core_sbc.c @@ -1074,7 +1074,7 @@ sbc_dif_copy_prot(struct se_cmd *cmd, unsigned int sectors, bool read, struct scatterlist *psg; void *paddr, *addr; unsigned int i, len, left; - unsigned int offset = 0; + unsigned int offset = sg_off; left = sectors * dev->prot_length; @@ -1084,11 +1084,10 @@ sbc_dif_copy_prot(struct se_cmd *cmd, unsigned int sectors, bool read, if (offset >= sg->length) { sg = sg_next(sg); offset = 0; - sg_off = sg->offset; } paddr = kmap_atomic(sg_page(psg)) + psg->offset; - addr = kmap_atomic(sg_page(sg)) + sg_off; + addr = kmap_atomic(sg_page(sg)) + sg->offset + offset; if (read) memcpy(paddr, addr, len); |