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| author | Koba Ko <koba.ko@canonical.com> | 2022-09-01 22:47:12 +0800 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2022-09-09 16:18:33 +0800 |
| commit | 68dbe80f5b510c66c800b9e8055235c5b07e37d1 (patch) | |
| tree | 38bcd9a5f427fd0927b2fa0ca0aef71897a96b47 /drivers/crypto/ccp | |
| parent | 24ddd4e1dbfcf530b89c3d994789cc2e57cbe713 (diff) | |
| download | linux-68dbe80f5b510c66c800b9e8055235c5b07e37d1.tar.gz linux-68dbe80f5b510c66c800b9e8055235c5b07e37d1.tar.bz2 linux-68dbe80f5b510c66c800b9e8055235c5b07e37d1.zip | |
crypto: ccp - Release dma channels before dmaengine unrgister
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: 54cce8ecb925 ("crypto: ccp - ccp_dmaengine_unregister release dma channels")
Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Koba Ko <koba.ko@canonical.com>
Acked-by: Tom Lendacky <thomas.lendacky@amd.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'drivers/crypto/ccp')
| -rw-r--r-- | drivers/crypto/ccp/ccp-dmaengine.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/drivers/crypto/ccp/ccp-dmaengine.c b/drivers/crypto/ccp/ccp-dmaengine.c index 7d4b4ad1db1f..9f753cb4f5f1 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); |