diff options
| author | Gary R Hook <gary.hook@amd.com> | 2017-01-27 15:28:45 -0600 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2017-02-03 17:45:45 +0800 |
| commit | 500c0106e638e08c2c661c305ed57d6b67e10908 (patch) | |
| tree | 8fcb8de6b8ee55537f6866bd2bf3ba128f22a803 | |
| parent | f5f7bebc91ab378dea5aad5277c4d283e46472d9 (diff) | |
| download | linux-btrfs-500c0106e638e08c2c661c305ed57d6b67e10908.tar.gz | |
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: Gary R Hook <gary.hook@amd.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
| -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 e2ce8190ecc9a5..612898b4aaad04 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) |