crypto: ccp - Fix DMA operations when IOMMU is enabled
commit 500c0106e6
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>
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@ -955,7 +955,7 @@ static irqreturn_t ccp5_irq_handler(int irq, void *data)
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static void ccp5_config(struct ccp_device *ccp)
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{
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/* Public side */
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iowrite32(0x00001249, ccp->io_regs + CMD5_REQID_CONFIG_OFFSET);
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iowrite32(0x0, ccp->io_regs + CMD5_REQID_CONFIG_OFFSET);
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}
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static void ccp5other_config(struct ccp_device *ccp)
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