staging: kpc2000: report error status to spi core

There is an error condition that's not reported to
the spi core in kp_spi_transfer_one_message().
It should restore status value to m->status, and
return it in error path.

Signed-off-by: Mao Wenan <maowenan@huawei.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/staging/kpc2000/kpc2000_spi.c b/drivers/staging/kpc2000/kpc2000_spi.c
index 075ae4f..628a447 100644 (file)
--- a/drivers/staging/kpc2000/kpc2000_spi.c
+++ b/drivers/staging/kpc2000/kpc2000_spi.c
@@ -374,7 +374,7 @@ kp_spi_transfer_one_message(struct spi_master *master, struct spi_message *m)
     list_for_each_entry(transfer, &m->transfers, transfer_list) {
         if (transfer->tx_buf == NULL && transfer->rx_buf == NULL && transfer->len) {
             status = -EINVAL;
-            break;
+            goto error;
         }
         
         /* transfer */
@@ -412,7 +412,7 @@ kp_spi_transfer_one_message(struct spi_master *master, struct spi_message *m)
             
             if (count != transfer->len) {
                 status = -EIO;
-                break;
+                goto error;
             }
         }
         
@@ -430,6 +430,10 @@ kp_spi_transfer_one_message(struct spi_master *master, struct spi_message *m)
     /* done work */
     spi_finalize_current_message(master);
     return 0;
+
+ error:
+    m->status = status;
+    return status;
 }
 
 static void