linux-kernel - [PATCH AUTOSEL for 4.14 10/51] staging: rtl8822be: fix wrong dma unmap len

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Date:   Wed, 22 Nov 2017 22:25:38 +0000
From:   alexander.levin@...izon.com
To:     "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "stable@...r.kernel.org" <stable@...r.kernel.org>
Cc:     Stanislaw Gruszka <sgruszka@...hat.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        alexander.levin@...izon.com
Subject: [PATCH AUTOSEL for 4.14 10/51] staging: rtl8822be: fix wrong dma
 unmap len

From: Stanislaw Gruszka <sgruszka@...hat.com>

[ Upstream commit c40a45a465e9eab72cfdd3ab69d15cf8ef8b89c8 ]

Patch fixes splat:

r8822be 0000:04:00.0: DMA-API: device driver frees DMA memory with different size
[device address=0x0000000078477000] [map size=4096 bytes] [unmap size=424 bytes]
<snip>
Call Trace:
  debug_dma_unmap_page+0xa5/0xb0
  ? unmap_single+0x2f/0x40
  _rtl8822be_send_bcn_or_cmd_packet+0x2c5/0x300 [r8822be]
  ? _rtl8822be_send_bcn_or_cmd_packet+0x2c5/0x300 [r8822be]
  rtl8822b_halmac_cb_write_data_rsvd_page+0x51/0xc0 [r8822be]
  _halmac_write_data_rsvd_page+0x22/0x30 [r8822be]
  halmac_download_rsvd_page_88xx+0xee/0x1f0 [r8822be]
  halmac_dlfw_to_mem_88xx+0x80/0x120 [r8822be]
  halmac_download_firmware_88xx.part.47+0x477/0x600 [r8822be]
  halmac_download_firmware_88xx+0x32/0x40 [r8822be]
  rtl_halmac_dlfw+0x70/0x120 [r8822be]
  rtl_halmac_init_hal+0x5f/0x1b0 [r8822be]
  rtl8822be_hw_init+0x8a2/0x1040 [r8822be]

Signed-off-by: Stanislaw Gruszka <sgruszka@...hat.com>
Acked-by: Larry Finger <Larry.Finger@...inger.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Signed-off-by: Sasha Levin <alexander.levin@...izon.com>
---
 drivers/staging/rtlwifi/rtl8822be/fw.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/staging/rtlwifi/rtl8822be/fw.c b/drivers/staging/rtlwifi/rtl8822be/fw.c
index 8e24da16752c..a2cc54866e79 100644
--- a/drivers/staging/rtlwifi/rtl8822be/fw.c
+++ b/drivers/staging/rtlwifi/rtl8822be/fw.c
@@ -419,7 +419,7 @@ static bool _rtl8822be_send_bcn_or_cmd_packet(struct ieee80211_hw *hw,
 		dma_addr = rtlpriv->cfg->ops->get_desc(
 				hw, (u8 *)pbd_desc, true, HW_DESC_TXBUFF_ADDR);
 
-		pci_unmap_single(rtlpci->pdev, dma_addr, skb->len,
+		pci_unmap_single(rtlpci->pdev, dma_addr, pskb->len,
 				 PCI_DMA_TODEVICE);
 		kfree_skb(pskb);
 
-- 
2.11.0