mwl8k: don't return zero on failure paths in mwl8k_probe[_hw]()

If pci_iomap() fails in mwl8k_probe(), it breaks off initialization,
deallocates all resources, but returns zero.
There is a similar issue when priv->rxd_ops is NULL in mwl8k_probe_hw().

The patch adds proper error code return values.

Found by Linux Driver Verification project (linuxtesting.org).

Signed-off-by: Alexey Khoroshilov <khoroshilov@ispras.ru>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 3 insertions, 0 deletions

diff --git a/drivers/net/wireless/mwl8k.c b/drivers/net/wireless/mwl8k.c
index a9c078899252..68357641c414 100644
--- a/drivers/net/wireless/mwl8k.c
+++ b/drivers/net/wireless/mwl8k.c
@@ -5555,6 +5555,7 @@ static int mwl8k_probe_hw(struct ieee80211_hw *hw)
                 if (priv->rxd_ops == NULL) {
                         wiphy_err(hw->wiphy,
                                   "Driver does not have AP firmware image support for this hardware\n");
+                        rc = -ENOENT;
                         goto err_stop_firmware;
                 }
         } else {
@@ -5901,6 +5902,7 @@ static int mwl8k_probe(struct pci_dev *pdev,
         priv->sram = pci_iomap(pdev, 0, 0x10000);
         if (priv->sram == NULL) {
                 wiphy_err(hw->wiphy, "Cannot map device SRAM\n");
+                rc = -EIO;
                 goto err_iounmap;
         }
 
@@ -5913,6 +5915,7 @@ static int mwl8k_probe(struct pci_dev *pdev,
                 priv->regs = pci_iomap(pdev, 2, 0x10000);
                 if (priv->regs == NULL) {
                         wiphy_err(hw->wiphy, "Cannot map device registers\n");
+                        rc = -EIO;
                         goto err_iounmap;
                 }
         }