diff options
| author | Gary R Hook <gary.hook@amd.com> | 2017-01-27 15:28:45 -0600 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-02-14 15:25:33 -0800 |
| commit | 1105ccf25118894ffde5b50d43c52b9e39fe3fc9 (patch) | |
| tree | 1248c4d4271408bfae459817a2d4f9d04cd90250 /drivers/crypto | |
| parent | d7aa88a14eb059cdc9c82206cd3ee8ccb6f62ee6 (diff) | |
crypto: ccp - Fix DMA operations when IOMMU is enabled
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>
Diffstat (limited to 'drivers/crypto')
| -rw-r--r-- | drivers/crypto/ccp/ccp-dev-v5.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/crypto/ccp/ccp-dev-v5.c b/drivers/crypto/ccp/ccp-dev-v5.c index faf3cb3ddce2..a388bf2d67f4 100644 --- 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 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) |