sg_common_write(Sg_fd * sfp, Sg_request * srp,
unsigned char *cmnd, int timeout, int blocking)
{
- int k, data_dir, at_head;
+ int k, at_head;
Sg_device *sdp = sfp->parentdp;
sg_io_hdr_t *hp = &srp->header;
return -ENODEV;
}
- switch (hp->dxfer_direction) {
- case SG_DXFER_TO_FROM_DEV:
- case SG_DXFER_FROM_DEV:
- data_dir = DMA_FROM_DEVICE;
- break;
- case SG_DXFER_TO_DEV:
- data_dir = DMA_TO_DEVICE;
- break;
- case SG_DXFER_UNKNOWN:
- data_dir = DMA_BIDIRECTIONAL;
- break;
- default:
- data_dir = DMA_NONE;
- break;
- }
hp->duration = jiffies_to_msecs(jiffies);
if (hp->interface_id != '\0' && /* v3 (or later) interface */
(SG_FLAG_Q_AT_TAIL & hp->flags))
}
if (iov_count) {
- int len, size = sizeof(struct sg_iovec) * iov_count;
+ int size = sizeof(struct iovec) * iov_count;
struct iovec *iov;
+ struct iov_iter i;
iov = memdup_user(hp->dxferp, size);
if (IS_ERR(iov))
return PTR_ERR(iov);
- len = iov_length(iov, iov_count);
- if (hp->dxfer_len < len) {
- iov_count = iov_shorten(iov, iov_count, hp->dxfer_len);
- len = hp->dxfer_len;
- }
+ iov_iter_init(&i, rw, iov, iov_count,
+ min_t(size_t, hp->dxfer_len,
+ iov_length(iov, iov_count)));
- res = blk_rq_map_user_iov(q, rq, md, (struct sg_iovec *)iov,
- iov_count,
- len, GFP_ATOMIC);
+ res = blk_rq_map_user_iov(q, rq, md, &i, GFP_ATOMIC);
kfree(iov);
} else
res = blk_rq_map_user(q, rq, md, hp->dxferp,