A-Team_Digital_Solutions/android_kernel_motorola_sm6375
Watch
2
0
Fork
You've already forked android_kernel_motorola_sm6375
 0
mirror of https://github.com/BobTheBlinker/android_kernel_motorola_sm6375.git synced 2026-10-14 00:24:41 -04:00
Code Issues Projects Releases Packages Wiki Activity

qcacld-3.0: skip dma unmap for IPA owned skb

Browse source 
In MCC tx path, skb is owned by IPA driver, where IPA driver provides
wlan driver directly DMA mapped address. Doing dma unmap of the skb
will lead to skb dma map check failure.

Fix is to skip dma unmap for IPA owned skb and let IPA driver handle
dma unmap.

Change-Id: Ib38ca949ba915785e460c05172b70088a3564b1c
CRs-Fixed: 2189889
This commit is contained in:
jiad 2018-02-14 19:14:40 +08:00 • committed by snandini
commit af1b76efa5
1 changed files with 9 additions and 2 deletions
Download patch file Download diff file Expand all files Collapse all files

11
core/dp/txrx/ol_tx_desc.c
View file

@ -1,5 +1,5 @@
/*
* Copyright (c) 2011, 2014-2017 The Linux Foundation. All rights reserved.
* Copyright (c) 2011, 2014-2018 The Linux Foundation. All rights reserved.
*
* Previously licensed under the ISC license by Qualcomm Atheros, Inc.
*
@ -746,7 +746,14 @@ void ol_tx_desc_frame_list_free(struct ol_txrx_pdev_t *pdev,
/* restore original hdr offset */
OL_TX_RESTORE_HDR(tx_desc, msdu);
#endif
if (qdf_nbuf_get_users(msdu) <= 1)
/*
* In MCC IPA tx context, IPA driver provides skb with directly
* DMA mapped address. In such case, there's no need for WLAN
* driver to DMA unmap the skb.
*/
if ((qdf_nbuf_get_users(msdu) <= 1) &&
!qdf_nbuf_ipa_owned_get(msdu))
qdf_nbuf_unmap(pdev->osdev, msdu, QDF_DMA_TO_DEVICE);
/* free the tx desc */