pch_phub: Report error writing MAC back to user

Signed-off-by: Alexander Stein <alexander.stein@systec-electronic.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 4 insertions, 1 deletions

diff --git a/drivers/misc/pch_phub.c b/drivers/misc/pch_phub.c
index a5925f7f17f6..956597321d2a 100644
--- a/drivers/misc/pch_phub.c
+++ b/drivers/misc/pch_phub.c
@@ -636,6 +636,7 @@ static ssize_t store_pch_mac(struct device *dev, struct device_attribute *attr,
         u8 mac[ETH_ALEN];
         ssize_t rom_size;
         struct pch_phub_reg *chip = dev_get_drvdata(dev);
+        int ret;
 
         if (!mac_pton(buf, mac))
                 return -EINVAL;
@@ -644,8 +645,10 @@ static ssize_t store_pch_mac(struct device *dev, struct device_attribute *attr,
         if (!chip->pch_phub_extrom_base_address)
                 return -ENOMEM;
 
-        pch_phub_write_gbe_mac_addr(chip, mac);
+        ret = pch_phub_write_gbe_mac_addr(chip, mac);
         pci_unmap_rom(chip->pdev, chip->pch_phub_extrom_base_address);
+        if (ret)
+                return ret;
 
         return count;
 }