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| author | David S. Miller <davem@davemloft.net> | 2015-09-26 23:08:27 (GMT) |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2015-09-26 23:08:27 (GMT) |
| commit | 4963ed48f2c20196d51a447ee87dc2815584fee4 (patch) | |
| tree | a1902f466dafa00453889a4f1e66b00249ce0529 /block/blk-map.c | |
| parent | 4d54d86546f62c7c4a0fe3b36a64c5e3b98ce1a9 (diff) | |
| parent | 518a7cb6980cd640c7f979d29021ad870f60d7d7 (diff) | |
| download | linux-4963ed48f2c20196d51a447ee87dc2815584fee4.tar.xz | |
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
Conflicts:
net/ipv4/arp.c
The net/ipv4/arp.c conflict was one commit adding a new
local variable while another commit was deleting one.
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'block/blk-map.c')
| -rw-r--r-- | block/blk-map.c | 26 |
1 files changed, 24 insertions, 2 deletions
diff --git a/block/blk-map.c b/block/blk-map.c index 2338416..f565e11 100644 --- a/block/blk-map.c +++ b/block/blk-map.c @@ -9,6 +9,24 @@ #include "blk.h" +static bool iovec_gap_to_prv(struct request_queue *q, + struct iovec *prv, struct iovec *cur) +{ + unsigned long prev_end; + + if (!queue_virt_boundary(q)) + return false; + + if (prv->iov_base == NULL && prv->iov_len == 0) + /* prv is not set - don't check */ + return false; + + prev_end = (unsigned long)(prv->iov_base + prv->iov_len); + + return (((unsigned long)cur->iov_base & queue_virt_boundary(q)) || + prev_end & queue_virt_boundary(q)); +} + int blk_rq_append_bio(struct request_queue *q, struct request *rq, struct bio *bio) { @@ -67,7 +85,7 @@ int blk_rq_map_user_iov(struct request_queue *q, struct request *rq, struct bio *bio; int unaligned = 0; struct iov_iter i; - struct iovec iov; + struct iovec iov, prv = {.iov_base = NULL, .iov_len = 0}; if (!iter || !iter->count) return -EINVAL; @@ -81,8 +99,12 @@ int blk_rq_map_user_iov(struct request_queue *q, struct request *rq, /* * Keep going so we check length of all segments */ - if (uaddr & queue_dma_alignment(q)) + if ((uaddr & queue_dma_alignment(q)) || + iovec_gap_to_prv(q, &prv, &iov)) unaligned = 1; + + prv.iov_base = iov.iov_base; + prv.iov_len = iov.iov_len; } if (unaligned || (q->dma_pad_mask & iter->count) || map_data) |