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bdev/nvme: reorganize queued_next_sge()

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No functional change, but removes a few assumptions
that will be invalid in a future patch that fixes a
bug in this function.  Primarily we no longer assume
that this function will always increment the
iovpos and reset iov_offset to 0.

Signed-off-by: Jim Harris <james.r.harris@intel.com>
Change-Id: I770f2f24c37626063e113af850a2af792aed332a
This commit is contained in:
Jim Harris 2016-11-08 23:00:43 -07:00
parent 77c57e2ff8
commit aac30ff3f4
1 changed files with 5 additions and 1 deletions
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6
lib/bdev/nvme/blockdev_nvme.c
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@ -648,7 +648,6 @@ queued_next_sge(void *ref, void **address, uint32_t *length)
assert(bio->iovpos < bio->iovcnt);
iov = &bio->iovs[bio->iovpos];
bio->iovpos++;
*address = iov->iov_base;
*length = iov->iov_len;
@ -657,6 +656,11 @@ queued_next_sge(void *ref, void **address, uint32_t *length)
assert(bio->iov_offset <= iov->iov_len);
*address += bio->iov_offset;
*length -= bio->iov_offset;
}
bio->iov_offset += *length;
if (bio->iov_offset == iov->iov_len) {
bio->iovpos++;
bio->iov_offset = 0;
}