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crypto: qat - disable registration of algorithms

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commit 8893d27ffcaf6ec6267038a177cb87bcde4dd3de upstream.

The implementations of aead and skcipher in the QAT driver do not
support properly requests with the CRYPTO_TFM_REQ_MAY_BACKLOG flag set.
If the HW queue is full, the driver returns -EBUSY but does not enqueue
the request.
This can result in applications like dm-crypt waiting indefinitely for a
completion of a request that was never submitted to the hardware.

To avoid this problem, disable the registration of all crypto algorithms
in the QAT driver by setting the number of crypto instances to 0 at
configuration time.

Cc: stable@vger.kernel.org
Signed-off-by: Giovanni Cabiddu <giovanni.cabiddu@intel.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Giovanni Cabiddu 2022-03-04 17:54:47 +00:00 committed by Greg Kroah-Hartman
parent 9f4e64611e
commit c971e6a1c8
1 changed files with 8 additions and 0 deletions
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8
drivers/crypto/qat/qat_common/qat_crypto.c
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@ -126,6 +126,14 @@ int qat_crypto_dev_config(struct adf_accel_dev *accel_dev)
goto err;
if (adf_cfg_section_add(accel_dev, "Accelerator0"))
goto err;
/* Temporarily set the number of crypto instances to zero to avoid
* registering the crypto algorithms.
* This will be removed when the algorithms will support the
* CRYPTO_TFM_REQ_MAY_BACKLOG flag
*/
instances = 0;
for (i = 0; i < instances; i++) {
val = i;
snprintf(key, sizeof(key), ADF_CY "%d" ADF_RING_BANK_NUM, i);