xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

amd-xgbe: Fix DMA API debug warning

Browse Source 
When running a kernel configured with CONFIG_DMA_API_DEBUG=y a warning
is issued:
  DMA-API: device driver tries to sync DMA memory it has not allocated

This warning is the result of mapping the full range of the Rx buffer
pages allocated and then performing a dma_sync_single_for_cpu against
a calculated DMA address. The proper thing to do is to use the
dma_sync_single_range_for_cpu with a base DMA address and an offset.

Reported-by: Kim Phillips <kim.phillips@arm.com>
Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com>
Tested-by: Kim Phillips <kim.phillips@arm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Lendacky, Thomas
2015-07-06 11:57:37 -05:00
committed by David S. Miller
parent 95ec655bc4
commit cfbfd86bfd
4 changed files with 22 additions and 12 deletions
Download Patch File Download Diff File Expand all files Collapse all files

3
drivers/net/ethernet/amd/xgbe/xgbe-desc.c
View File

@@ -303,7 +303,8 @@ static void xgbe_set_buffer_data(struct xgbe_buffer_data *bd,
get_page(pa->pages);
bd->pa = *pa;
bd->dma = pa->pages_dma + pa->pages_offset;
bd->dma_base = pa->pages_dma;
bd->dma_off = pa->pages_offset;
bd->dma_len = len;
pa->pages_offset += len;