Re: [PATCH/RFC v3 net] ravb: unmap descriptors when freeing rings

On 01/24/2017 09:21 PM, Simon Horman wrote:

From: Kazuya Mizuguchi <redacted>

"swiotlb buffer is full" errors occur after repeated initialisation of a
device - f.e. suspend/resume or ip link set up/down. This is because memory
mapped using dma_map_single() in ravb_ring_format() and ravb_start_xmit()
is not released.  Resolve this problem by unmapping descriptors when
freeing rings.

    Could you look into the sh_eth driver which seems to have the same issue?

Note, ravb_tx_free() is moved but not otherwise modified by this patch.

    This is not true anymore BTW.

Signed-off-by: Kazuya Mizuguchi <redacted>
[simon: reworked]
Signed-off-by: Simon Horman <redacted>

MBR, Sergei