Patch "crypto: ccp - Fix DMA operations when IOMMU is enabled" has been added to the 4.9-stable tree

Patch "crypto: ccp - Fix DMA operations when IOMMU is enabled" 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 DMA operations when IOMMU is enabled

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-dma-operations-when-iommu-is-enabled.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 500c0106e638e08c2c661c305ed57d6b67e10908 Mon Sep 17 00:00:00 2001
From: Gary R Hook <gary.hook@amd.com>
Date: Fri, 27 Jan 2017 15:28:45 -0600
Subject: crypto: ccp - Fix DMA operations when IOMMU is enabled

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

commit 500c0106e638e08c2c661c305ed57d6b67e10908 upstream.

An I/O page fault occurs when the IOMMU is enabled on a
system that supports the v5 CCP.  DMA operations use a
Request ID value that does not match what is expected by
the IOMMU, resulting in the I/O page fault.  Setting the
Request ID value to 0 corrects this issue.

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-v5.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/crypto/ccp/ccp-dev-v5.c
+++ b/drivers/crypto/ccp/ccp-dev-v5.c
@@ -955,7 +955,7 @@ static irqreturn_t ccp5_irq_handler(int
 static void ccp5_config(struct ccp_device *ccp)
 {
 	/* Public side */
-	iowrite32(0x00001249, ccp->io_regs + CMD5_REQID_CONFIG_OFFSET);
+	iowrite32(0x0, ccp->io_regs + CMD5_REQID_CONFIG_OFFSET);
 }
 
 static void ccp5other_config(struct ccp_device *ccp)


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