mwl8k: fix error handling in mwl8k_post_cmd()

If pci_map_single() fails in mwl8k_post_cmd(),
it returns -ENOMEM immediately, while cleanup is required.

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

Signed-off-by: Alexey Khoroshilov <khoroshilov@ispras.ru>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>

diff --git a/drivers/net/wireless/marvell/mwl8k.c b/drivers/net/wireless/marvell/mwl8k.c
index 8e4e9b6919e0274cbdbc3a2cfde72b2e40c8fb6f..e0df51b62e9762081cb96d69a38440a1e1a16119 100644 (file)
--- a/drivers/net/wireless/marvell/mwl8k.c
+++ b/drivers/net/wireless/marvell/mwl8k.c
@@ -2234,8 +2234,10 @@ static int mwl8k_post_cmd(struct ieee80211_hw *hw, struct mwl8k_cmd_pkt *cmd)
        dma_size = le16_to_cpu(cmd->length);
        dma_addr = pci_map_single(priv->pdev, cmd, dma_size,
                                  PCI_DMA_BIDIRECTIONAL);
-       if (pci_dma_mapping_error(priv->pdev, dma_addr))
-               return -ENOMEM;
+       if (pci_dma_mapping_error(priv->pdev, dma_addr)) {
+               rc = -ENOMEM;
+               goto exit;
+       }
 
        priv->hostcmd_wait = &cmd_wait;
        iowrite32(dma_addr, regs + MWL8K_HIU_GEN_PTR);
@@ -2275,6 +2277,7 @@ static int mwl8k_post_cmd(struct ieee80211_hw *hw, struct mwl8k_cmd_pkt *cmd)
                                     ms);
        }
 
+exit:
        if (bitmap)
                mwl8k_enable_bsses(hw, true, bitmap);