Re: [PATCH] crypto: ccp: Fix DMA operations when IOMMU is enabled
From: Gary R Hook <hidden>
Date: 2017-02-02 17:15:17
On 01/27/2017 03:28 PM, Gary R Hook wrote:
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.
Herbert, Hoping to get some 4.10 love on this patch, plus one other. Do we see a possibility at this late date?
quoted hunk ↗ jump to hunk
Signed-off-by: Gary R Hook <redacted> --- drivers/crypto/ccp/ccp-dev-v5.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)diff --git a/drivers/crypto/ccp/ccp-dev-v5.c b/drivers/crypto/ccp/ccp-dev-v5.c index e2ce819..612898b 100644 --- a/drivers/crypto/ccp/ccp-dev-v5.c +++ b/drivers/crypto/ccp/ccp-dev-v5.c@@ -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) --To unsubscribe from this list: send the line "unsubscribe linux-crypto" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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