if (dir == SG_DXFER_TO_DEV) {
io_hdr_v4.dout_xfer_len = (uint32_t)byte_cnt;
io_hdr_v4.dout_xferp = (uintptr_t)(__u64)buff;
+ } else {
+ io_hdr_v4.din_xfer_len = (uint32_t)byte_cnt;
+ io_hdr_v4.din_xferp = (uintptr_t)(__u64)buff;
}
-If you wish to write a descriptor, use the dout_xferp sg_io_v4.
+If you wish to read or write a descriptor, use the appropriate xferp of
+sg_io_v4.
+
UFS Specifications can be found at,
UFS - http://www.jedec.org/sites/default/files/docs/JESD220.pdf
struct utp_upiu_query *qr;
u8 *descp;
- if (desc_op == UPIU_QUERY_OPCODE_READ_DESC) {
- dev_err(hba->dev, "unsupported opcode %d\n", desc_op);
- return -ENOTSUPP;
- }
-
- if (desc_op != UPIU_QUERY_OPCODE_WRITE_DESC)
+ if (desc_op != UPIU_QUERY_OPCODE_WRITE_DESC &&
+ desc_op != UPIU_QUERY_OPCODE_READ_DESC)
goto out;
qr = &bsg_request->upiu_req.qr;
if (!descp)
return -ENOMEM;
- sg_copy_to_buffer(job->request_payload.sg_list,
- job->request_payload.sg_cnt, descp, *desc_len);
+ if (desc_op == UPIU_QUERY_OPCODE_WRITE_DESC)
+ sg_copy_to_buffer(job->request_payload.sg_list,
+ job->request_payload.sg_cnt, descp,
+ *desc_len);
*desc_buff = descp;
if (!desc_buff)
goto out;
+ if (desc_op == UPIU_QUERY_OPCODE_READ_DESC && desc_len)
+ bsg_reply->reply_payload_rcv_len =
+ sg_copy_from_buffer(job->request_payload.sg_list,
+ job->request_payload.sg_cnt,
+ desc_buff, desc_len);
+
kfree(desc_buff);
out: