From: Alexey Khoroshilov <khoroshilov@ispras.ru>
Date: Fri, 5 Apr 2019 21:26:38 +0000 (+0300)
Subject: mwl8k: fix error handling in mwl8k_post_cmd()
X-Git-Url: http://git.osdn.net/view?a=commitdiff_plain;h=d1717282afd54a34f01628e5a4559f913c6b0317;p=android-x86%2Fkernel.git

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 8e4e9b6919e0..e0df51b62e97 100644
--- 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);