[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>
diff --git a/drivers/scsi/libsrp.c b/drivers/scsi/libsrp.c
index 89403b0..37a0f4d 100644
--- a/drivers/scsi/libsrp.c
+++ b/drivers/scsi/libsrp.c
@@ -225,8 +225,7 @@
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 @@
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 @@
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 @@
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 @@
break;
default:
eprintk("Unknown format %d %x\n", dir, format);
- break;
+ err = -EINVAL;
}
return err;