diff options
| author | Asias He | 2013-01-22 11:20:26 +0800 |
|---|---|---|
| committer | Nicholas Bellinger | 2013-02-13 11:27:41 -0800 |
| commit | f3158f362ca8b77b24c5de86cbec347ab2bb6430 (patch) | |
| tree | 7475677803571df7f23d3c1efdc309a82311178f | |
| parent | 765b34fdc1507add8fd6f1007410e7a375d0f89c (diff) | |
tcm_vhost: Use iov_num_pages to calculate sgl_count
Signed-off-by: Asias He <asias@redhat.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
| -rw-r--r-- | drivers/vhost/tcm_vhost.c | 8 |
1 files changed, 3 insertions, 5 deletions
diff --git a/drivers/vhost/tcm_vhost.c b/drivers/vhost/tcm_vhost.c index defc28595656..62058d7a562f 100644 --- a/drivers/vhost/tcm_vhost.c +++ b/drivers/vhost/tcm_vhost.c @@ -479,11 +479,9 @@ static int vhost_scsi_map_iov_to_sgl(struct tcm_vhost_cmd *tv_cmd, * Find out how long sglist needs to be */ sgl_count = 0; - for (i = 0; i < niov; i++) { - sgl_count += (((uintptr_t)iov[i].iov_base + iov[i].iov_len + - PAGE_SIZE - 1) >> PAGE_SHIFT) - - ((uintptr_t)iov[i].iov_base >> PAGE_SHIFT); - } + for (i = 0; i < niov; i++) + sgl_count += iov_num_pages(&iov[i]); + /* TODO overflow checking */ sg = kmalloc(sizeof(tv_cmd->tvc_sgl[0]) * sgl_count, GFP_ATOMIC); |