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| author | Sergei Shtylyov <sergei.shtylyov@cogentembedded.com> | 2017-04-17 08:55:22 -0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-05-03 11:36:36 -0400 |
| commit | e344e97fb359ca02c1892d093daae7c2060e965e (patch) | |
| tree | 5907a38ebb3ee7c5a0accfdb581940950d05d31b /include/uapi | |
| parent | b4580d6f10a3b277669fd1d4cf7cac49ad9c8b77 (diff) | |
sh_eth: unmap DMA buffers when freeing rings
[ Upstream commit 1debdc8f9ebd07daf140e417b3841596911e0066 ]
The DMA API debugging (when enabled) causes:
WARNING: CPU: 0 PID: 1445 at lib/dma-debug.c:519 add_dma_entry+0xe0/0x12c
DMA-API: exceeded 7 overlapping mappings of cacheline 0x01b2974d
to be printed after repeated initialization of the Ether device, e.g.
suspend/resume or 'ifconfig' up/down. This is because DMA buffers mapped
using dma_map_single() in sh_eth_ring_format() and sh_eth_start_xmit() are
never unmapped. Resolve this problem by unmapping the buffers when freeing
the descriptor rings; in order to do it right, we'd have to add an extra
parameter to sh_eth_txfree() (we rename this function to sh_eth_tx_free(),
while at it).
Based on the commit a47b70ea86bd ("ravb: unmap descriptors when freeing
rings").
Signed-off-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'include/uapi')
0 files changed, 0 insertions, 0 deletions