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authorGary R Hook <gary.hook@amd.com>2017-01-28 02:09:04 +0300
committerHerbert Xu <herbert@gondor.apana.org.au>2017-02-03 12:45:46 +0300
commite5da5c5667381d2772374ee6a2967b3576c9483d (patch)
tree426bc8a0a32233f28da1fa913e99b4a6c30b64db /drivers/crypto/ccp
parent500c0106e638e08c2c661c305ed57d6b67e10908 (diff)
downloadlinux-e5da5c5667381d2772374ee6a2967b3576c9483d.tar.xz
crypto: ccp - Fix double add when creating new DMA command
Eliminate a double-add by creating a new list to manage command descriptors when created; move the descriptor to the pending list when the command is submitted. Cc: <stable@vger.kernel.org> Signed-off-by: Gary R Hook <gary.hook@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-dev.h1
-rw-r--r--drivers/crypto/ccp/ccp-dmaengine.c6
2 files changed, 6 insertions, 1 deletions
diff --git a/drivers/crypto/ccp/ccp-dev.h b/drivers/crypto/ccp/ccp-dev.h
index 830f35e6005f..649e5610a5ce 100644
--- a/drivers/crypto/ccp/ccp-dev.h
+++ b/drivers/crypto/ccp/ccp-dev.h
@@ -238,6 +238,7 @@ struct ccp_dma_chan {
struct ccp_device *ccp;
spinlock_t lock;
+ struct list_head created;
struct list_head pending;
struct list_head active;
struct list_head complete;
diff --git a/drivers/crypto/ccp/ccp-dmaengine.c b/drivers/crypto/ccp/ccp-dmaengine.c
index 6553912804f7..e5d9278f4019 100644
--- a/drivers/crypto/ccp/ccp-dmaengine.c
+++ b/drivers/crypto/ccp/ccp-dmaengine.c
@@ -63,6 +63,7 @@ static void ccp_free_chan_resources(struct dma_chan *dma_chan)
ccp_free_desc_resources(chan->ccp, &chan->complete);
ccp_free_desc_resources(chan->ccp, &chan->active);
ccp_free_desc_resources(chan->ccp, &chan->pending);
+ ccp_free_desc_resources(chan->ccp, &chan->created);
spin_unlock_irqrestore(&chan->lock, flags);
}
@@ -273,6 +274,7 @@ static dma_cookie_t ccp_tx_submit(struct dma_async_tx_descriptor *tx_desc)
spin_lock_irqsave(&chan->lock, flags);
cookie = dma_cookie_assign(tx_desc);
+ list_del(&desc->entry);
list_add_tail(&desc->entry, &chan->pending);
spin_unlock_irqrestore(&chan->lock, flags);
@@ -426,7 +428,7 @@ static struct ccp_dma_desc *ccp_create_desc(struct dma_chan *dma_chan,
spin_lock_irqsave(&chan->lock, sflags);
- list_add_tail(&desc->entry, &chan->pending);
+ list_add_tail(&desc->entry, &chan->created);
spin_unlock_irqrestore(&chan->lock, sflags);
@@ -610,6 +612,7 @@ static int ccp_terminate_all(struct dma_chan *dma_chan)
/*TODO: Purge the complete list? */
ccp_free_desc_resources(chan->ccp, &chan->active);
ccp_free_desc_resources(chan->ccp, &chan->pending);
+ ccp_free_desc_resources(chan->ccp, &chan->created);
spin_unlock_irqrestore(&chan->lock, flags);
@@ -679,6 +682,7 @@ int ccp_dmaengine_register(struct ccp_device *ccp)
chan->ccp = ccp;
spin_lock_init(&chan->lock);
+ INIT_LIST_HEAD(&chan->created);
INIT_LIST_HEAD(&chan->pending);
INIT_LIST_HEAD(&chan->active);
INIT_LIST_HEAD(&chan->complete);