sbp2: check for ARM failure

Sbp2 did not check for successful registration of the lower address range
when CONFIG_IEEE1394_SBP2_PHYS_DMA was set. If hpsb_register_addrspace
failed, a "login timed-out" would occur which is misleading. Now sbp2 logs
a sensible error message.

Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
Signed-off-by: Jody McIntyre <scjody@modernduck.com>

1 files changed, 7 insertions, 3 deletions

diff --git a/drivers/ieee1394/sbp2.c b/drivers/ieee1394/sbp2.c
index 0b2b0da5b883..ce3b43dd229b 100644
--- a/drivers/ieee1394/sbp2.c
+++ b/drivers/ieee1394/sbp2.c
@@ -749,9 +749,13 @@ static struct scsi_id_instance_data *sbp2_alloc_device(struct unit_directory *ud
 
 #ifdef CONFIG_IEEE1394_SBP2_PHYS_DMA
                 /* Handle data movement if physical dma is not
-                 * enabled/supportedon host controller */
-                hpsb_register_addrspace(&sbp2_highlevel, ud->ne->host, &sbp2_physdma_ops,
-                                        0x0ULL, 0xfffffffcULL);
+                 * enabled or not supported on host controller */
+                if (!hpsb_register_addrspace(&sbp2_highlevel, ud->ne->host,
+                                             &sbp2_physdma_ops,
+                                             0x0ULL, 0xfffffffcULL)) {
+                        SBP2_ERR("failed to register lower 4GB address range");
+                        goto failed_alloc;
+                }
 #endif
         }