[SCSI] tgt: fix rdma transfer bugs

- ibmstgt hits the max rdma transfer size (128k).
- libsrp returns a rdma transfer error properly.

Signed-off-by: Bastian Blank <bastian@waldi.eu.org>
Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>

1 files changed, 6 insertions, 6 deletions

diff --git a/drivers/scsi/libsrp.c b/drivers/scsi/libsrp.c
index 89403b00e042..37a0f4dd6186 100644
--- a/drivers/scsi/libsrp.c
+++ b/drivers/scsi/libsrp.c
@@ -225,8 +225,7 @@ static int srp_indirect_data(struct scsi_cmnd *sc, struct srp_cmd *cmd,
         struct srp_direct_buf *md = NULL;
         struct scatterlist dummy, *sg = NULL;
         dma_addr_t token = 0;
-        long err;
-        unsigned int done = 0;
+        int err = 0;
         int nmd, nsg = 0, len;
 
         if (dma_map || ext_desc) {
@@ -258,8 +257,8 @@ static int srp_indirect_data(struct scsi_cmnd *sc, struct srp_cmd *cmd,
                 sg_dma_address(&dummy) = token;
                 err = rdma_io(sc, &dummy, 1, &id->table_desc, 1, DMA_TO_DEVICE,
                               id->table_desc.len);
-                if (err < 0) {
-                        eprintk("Error copying indirect table %ld\n", err);
+                if (err) {
+                        eprintk("Error copying indirect table %d\n", err);
                         goto free_mem;
                 }
         } else {
@@ -272,6 +271,7 @@ rdma:
                 nsg = dma_map_sg(iue->target->dev, sg, sc->use_sg, DMA_BIDIRECTIONAL);
                 if (!nsg) {
                         eprintk("fail to map %p %d\n", iue, sc->use_sg);
+                        err = -EIO;
                         goto free_mem;
                 }
                 len = min(sc->request_bufflen, id->len);
@@ -287,7 +287,7 @@ free_mem:
         if (token && dma_map)
                 dma_free_coherent(iue->target->dev, id->table_desc.len, md, token);
 
-        return done;
+        return err;
 }
 
 static int data_out_desc_size(struct srp_cmd *cmd)
@@ -352,7 +352,7 @@ int srp_transfer_data(struct scsi_cmnd *sc, struct srp_cmd *cmd,
                 break;
         default:
                 eprintk("Unknown format %d %x\n", dir, format);
-                break;
+                err = -EINVAL;
         }
 
         return err;