6.5-stable review patch. If anyone has any objections, please let me know.
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From: Giovanni Cabiddu giovanni.cabiddu@intel.com
[ Upstream commit 9b2f33a1bfcda90b857431a764c9c8f9a412bbe5 ]
The function adf_dev_init(), through the subsystem qat_crypto, populates the list of list of crypto instances accel_dev->crypto_list. If the list of instances is not empty, the function adf_dev_start() will then call qat_algs_registers() and qat_asym_algs_register() to register the crypto algorithms into the crypto framework.
If any of the functions in adf_dev_start() fail, the caller of such function, in the error path calls adf_dev_down() which in turn call adf_dev_stop() and adf_dev_shutdown(), see for example the function state_store in adf_sriov.c. However, if the registration of crypto algorithms is not done, adf_dev_stop() will try to unregister the algorithms regardless. This might cause the counter active_devs in qat_algs.c and qat_asym_algs.c to get to a negative value.
Add a new state, ADF_STATUS_CRYPTO_ALGS_REGISTERED, which tracks if the crypto algorithms are registered into the crypto framework. Then use this to unregister the algorithms if such flag is set. This ensures that the crypto algorithms are only unregistered if previously registered.
Fixes: d8cba25d2c68 ("crypto: qat - Intel(R) QAT driver framework") Signed-off-by: Giovanni Cabiddu giovanni.cabiddu@intel.com Reviewed-by: Adam Guerin adam.guerin@intel.com Signed-off-by: Herbert Xu herbert@gondor.apana.org.au Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/crypto/intel/qat/qat_common/adf_common_drv.h | 1 + drivers/crypto/intel/qat/qat_common/adf_init.c | 5 ++++- 2 files changed, 5 insertions(+), 1 deletion(-)
diff --git a/drivers/crypto/intel/qat/qat_common/adf_common_drv.h b/drivers/crypto/intel/qat/qat_common/adf_common_drv.h index b8132eb9bc2a0..7d3d67285ff8a 100644 --- a/drivers/crypto/intel/qat/qat_common/adf_common_drv.h +++ b/drivers/crypto/intel/qat/qat_common/adf_common_drv.h @@ -25,6 +25,7 @@ #define ADF_STATUS_AE_STARTED 6 #define ADF_STATUS_PF_RUNNING 7 #define ADF_STATUS_IRQ_ALLOCATED 8 +#define ADF_STATUS_CRYPTO_ALGS_REGISTERED 9
enum adf_dev_reset_mode { ADF_DEV_RESET_ASYNC = 0, diff --git a/drivers/crypto/intel/qat/qat_common/adf_init.c b/drivers/crypto/intel/qat/qat_common/adf_init.c index 8e66a77499f58..e4b823d21c505 100644 --- a/drivers/crypto/intel/qat/qat_common/adf_init.c +++ b/drivers/crypto/intel/qat/qat_common/adf_init.c @@ -209,6 +209,7 @@ static int adf_dev_start(struct adf_accel_dev *accel_dev) clear_bit(ADF_STATUS_STARTED, &accel_dev->status); return -EFAULT; } + set_bit(ADF_STATUS_CRYPTO_ALGS_REGISTERED, &accel_dev->status);
if (!list_empty(&accel_dev->compression_list) && qat_comp_algs_register()) { dev_err(&GET_DEV(accel_dev), @@ -249,10 +250,12 @@ static void adf_dev_stop(struct adf_accel_dev *accel_dev) clear_bit(ADF_STATUS_STARTING, &accel_dev->status); clear_bit(ADF_STATUS_STARTED, &accel_dev->status);
- if (!list_empty(&accel_dev->crypto_list)) { + if (!list_empty(&accel_dev->crypto_list) && + test_bit(ADF_STATUS_CRYPTO_ALGS_REGISTERED, &accel_dev->status)) { qat_algs_unregister(); qat_asym_algs_unregister(); } + clear_bit(ADF_STATUS_CRYPTO_ALGS_REGISTERED, &accel_dev->status);
if (!list_empty(&accel_dev->compression_list)) qat_comp_algs_unregister();