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Commit f3158f36 authored by Asias He's avatar Asias He Committed by Nicholas Bellinger
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tcm_vhost: Use iov_num_pages to calculate sgl_count 



Signed-off-by: default avatarAsias He <asias@redhat.com>
Signed-off-by: default avatarNicholas Bellinger <nab@linux-iscsi.org>
parent 765b34fd

drivers/vhost/tcm_vhost.c

+3 −5
Original line number Diff line number Diff line
@@ -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);