Patch "crypto: ccp - Fix double add when creating new DMA command" has been added to the 4.9-stable tree

Patch "crypto: ccp - Fix double add when creating new DMA command" has been added to the 4.9-stable tree

[gregkh]

This is a note to let you know that I've just added the patch titled

    crypto: ccp - Fix double add when creating new DMA command

to the 4.9-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     crypto-ccp-fix-double-add-when-creating-new-dma-command.patch
and it can be found in the queue-4.9 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From e5da5c5667381d2772374ee6a2967b3576c9483d Mon Sep 17 00:00:00 2001
From: Gary R Hook <gary.hook@amd.com>
Date: Fri, 27 Jan 2017 17:09:04 -0600
Subject: crypto: ccp - Fix double add when creating new DMA command

From: Gary R Hook <gary.hook@amd.com>

commit e5da5c5667381d2772374ee6a2967b3576c9483d upstream.

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.

Signed-off-by: Gary R Hook <gary.hook@amd.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/crypto/ccp/ccp-dev.h       |    1 +
 drivers/crypto/ccp/ccp-dmaengine.c |    6 +++++-
 2 files changed, 6 insertions(+), 1 deletion(-)

--- 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;
--- a/drivers/crypto/ccp/ccp-dmaengine.c
+++ b/drivers/crypto/ccp/ccp-dmaengine.c
@@ -63,6 +63,7 @@ static void ccp_free_chan_resources(stru
 	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
 	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_d
 
 	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_
 	/*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_de
 		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);


Patches currently in stable-queue which might be from gary.hook@amd.com are

queue-4.9/crypto-ccp-fix-double-add-when-creating-new-dma-command.patch
queue-4.9/crypto-ccp-fix-dma-operations-when-iommu-is-enabled.patch