linux-kernel - [PATCH 5.2 034/215] staging: kpc2000: report error status to spi core

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Message-Id: <20190729190746.218831662@linuxfoundation.org>
Date:   Mon, 29 Jul 2019 21:20:30 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Mao Wenan <maowenan@...wei.com>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.2 034/215] staging: kpc2000: report error status to spi core

[ Upstream commit 9164f336311863d3e9f80840f4a1cce2aee293bd ]

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@...wei.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/staging/kpc2000/kpc_spi/spi_driver.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/drivers/staging/kpc2000/kpc_spi/spi_driver.c b/drivers/staging/kpc2000/kpc_spi/spi_driver.c
index 86df16547a92..2f535022dc03 100644
--- a/drivers/staging/kpc2000/kpc_spi/spi_driver.c
+++ b/drivers/staging/kpc2000/kpc_spi/spi_driver.c
@@ -333,7 +333,7 @@ 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 */
@@ -371,7 +371,7 @@ kp_spi_transfer_one_message(struct spi_master *master, struct spi_message *m)
             
             if (count != transfer->len) {
                 status = -EIO;
-                break;
+                goto error;
             }
         }
         
@@ -389,6 +389,10 @@ 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
-- 
2.20.1