[PATCH] staging: rtl8822be: fix wrong dma unmap len

[Larry Finger]

On 10/23/2017 04:35 AM, Stanislaw Gruszka wrote:
> 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 at redhat.com>

Acked-by: Larry Finger <Larry.Finger at lwfinger.net>

Thanks Stanislaw. It is amazing how long I can stare at a piece of code without 
seeing the problem.

Larry

> ---
>   drivers/staging/rtlwifi/rtl8822be/fw.c |    2 +-
>   1 files changed, 1 insertions(+), 1 deletions(-)
> 
> diff --git a/drivers/staging/rtlwifi/rtl8822be/fw.c b/drivers/staging/rtlwifi/rtl8822be/fw.c
> index 8e24da1..a2cc548 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);
>   
>