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Commit 500c0106 authored by Gary R Hook's avatar Gary R Hook Committed by Herbert Xu
Browse files

crypto: ccp - Fix DMA operations when IOMMU is enabled 



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.

Cc: <stable@vger.kernel.org>
Signed-off-by: default avatarGary R Hook <gary.hook@amd.com>
Signed-off-by: default avatarHerbert Xu <herbert@gondor.apana.org.au>
parent f5f7bebc

drivers/crypto/ccp/ccp-dev-v5.c

+1 −1
Original line number Diff line number Diff line
@@ -959,7 +959,7 @@ static irqreturn_t ccp5_irq_handler(int irq, void *data) 
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)