On Thu, Sep 1, 2022 at 9:42 PM Tom Lendacky <thomas.lendacky@xxxxxxx> wrote: > > On 8/31/22 21:16, Koba Ko wrote: > > A warning is shown during shutdown, > > > > __dma_async_device_channel_unregister called while 2 clients hold a reference > > WARNING: CPU: 15 PID: 1 at drivers/dma/dmaengine.c:1110 __dma_async_device_channel_unregister+0xb7/0xc0 > > > > Call dma_release_channel for occupied channles before dma_async_device_unregister. > > > > Fixes: 4cbe9bc34ed0 ("crypto: ccp - ccp_dmaengine_unregister release dma channels") > > I can't find this Fixes: tag. I did find: > > 54cce8ecb925 ("crypto: ccp - ccp_dmaengine_unregister release dma channels") > > Not sure if Herbert can take care of that or if you'll need a v3. Sorry, it should be 54cce8ecb925("crypto: ccp - ccp_dmaengine_unregister release dma channels") > > With the change to the Fixes: tag > > Acked-by: Tom Lendacky <thomas.lendacky@xxxxxxx> > > > Reported-by: kernel test robot <lkp@xxxxxxxxx> > > Signed-off-by: Koba Ko <koba.ko@xxxxxxxxxxxxx> > > --- > > V2: Fix the unused warning > > --- > > drivers/crypto/ccp/ccp-dmaengine.c | 6 +++++- > > 1 file changed, 5 insertions(+), 1 deletion(-) > > > > diff --git a/drivers/crypto/ccp/ccp-dmaengine.c b/drivers/crypto/ccp/ccp-dmaengine.c > > index 7d4b4ad1db1f3..9f753cb4f5f18 100644 > > --- a/drivers/crypto/ccp/ccp-dmaengine.c > > +++ b/drivers/crypto/ccp/ccp-dmaengine.c > > @@ -641,6 +641,10 @@ static void ccp_dma_release(struct ccp_device *ccp) > > for (i = 0; i < ccp->cmd_q_count; i++) { > > chan = ccp->ccp_dma_chan + i; > > dma_chan = &chan->dma_chan; > > + > > + if (dma_chan->client_count) > > + dma_release_channel(dma_chan); > > + > > tasklet_kill(&chan->cleanup_tasklet); > > list_del_rcu(&dma_chan->device_node); > > } > > @@ -766,8 +770,8 @@ void ccp_dmaengine_unregister(struct ccp_device *ccp) > > if (!dmaengine) > > return; > > > > - dma_async_device_unregister(dma_dev); > > ccp_dma_release(ccp); > > + dma_async_device_unregister(dma_dev); > > > > kmem_cache_destroy(ccp->dma_desc_cache); > > kmem_cache_destroy(ccp->dma_cmd_cache);