Re: [PATCH] ib_srp: initialize dma_length in srp_map_idb

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On 11/15/2015 09:59 AM, Christoph Hellwig wrote:
Without this sg_dma_len will return 0 on architectures tha have
the dma_length field.

Signed-off-by: Christoph Hellwig <hch@xxxxxx>
---
  drivers/infiniband/ulp/srp/ib_srp.c | 3 +++
  1 file changed, 3 insertions(+)

diff --git a/drivers/infiniband/ulp/srp/ib_srp.c b/drivers/infiniband/ulp/srp/ib_srp.c
index 32f7962..445c0a6 100644
--- a/drivers/infiniband/ulp/srp/ib_srp.c
+++ b/drivers/infiniband/ulp/srp/ib_srp.c
@@ -1520,6 +1520,9 @@ static int srp_map_idb(struct srp_rdma_ch *ch, struct srp_request *req,
  		state.sg_nents = 1;
  		sg_set_buf(idb_sg, req->indirect_desc, idb_len);
  		idb_sg->dma_address = req->indirect_dma_addr; /* hack! */
+#ifdef CONFIG_NEED_SG_DMA_LENGTH
+		idb_sg->dma_length = idb_sg->length;	      /* hack^2 */
+#endif
  		ret = srp_map_finish_fr(&state, ch);
  		if (ret < 0)
  			return ret;


Hello Christoph,

How about adding "Cc: stable" to this patch such that it not only will be integrated in kernel v4.4 but also in kernel v4.3.1 or later ?

Thanks,

Bart.
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