diff options
| author | Damian Muszynski <damian.muszynski@intel.com> | 2023-11-21 18:02:23 +0100 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2023-12-01 18:03:26 +0800 |
| commit | d71fdd0f3c278c7f132c3a522645ebf9157edd6d (patch) | |
| tree | ad76387e7db41ab9b2bbf016ac61faa192fdd40c /drivers/crypto/intel | |
| parent | 65089000ba8c2ae713ccac6603319143f3e1c08b (diff) | |
crypto: qat - add sysfs_added flag for rate limiting
The qat_rl sysfs attribute group is registered within the adf_dev_start()
function, alongside other driver components.
If any of the functions preceding the group registration fails,
the adf_dev_start() function returns, and the caller, to undo the
operation, invokes adf_dev_stop() followed by adf_dev_shutdown().
However, the current flow lacks information about whether the
registration of the qat_rl attribute group was successful or not.
In cases where this condition is encountered, an error similar to
the following might be reported:
4xxx 0000:6b:00.0: Starting device qat_dev0
4xxx 0000:6b:00.0: qat_dev0 started 9 acceleration engines
4xxx 0000:6b:00.0: Failed to send init message
4xxx 0000:6b:00.0: Failed to start device qat_dev0
sysfs group 'qat_rl' not found for kobject '0000:6b:00.0'
...
sysfs_remove_groups+0x2d/0x50
adf_sysfs_rl_rm+0x44/0x70 [intel_qat]
adf_rl_stop+0x2d/0xb0 [intel_qat]
adf_dev_stop+0x33/0x1d0 [intel_qat]
adf_dev_down+0xf1/0x150 [intel_qat]
...
4xxx 0000:6b:00.0: qat_dev0 stopped 9 acceleration engines
4xxx 0000:6b:00.0: Resetting device qat_dev0
To prevent attempting to remove attributes from a group that has not
been added yet, a flag named 'sysfs_added' is introduced. This flag
is set to true upon the successful registration of the attribute group.
Fixes: d9fb8408376e ("crypto: qat - add rate limiting feature to qat_4xxx")
Signed-off-by: Damian Muszynski <damian.muszynski@intel.com>
Reviewed-by: Giovanni Cabiddu <giovanni.cabiddu@intel.com>
Reviewed-by: Ahsan Atta <ahsan.atta@intel.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'drivers/crypto/intel')
| -rw-r--r-- | drivers/crypto/intel/qat/qat_common/adf_rl.h | 1 | ||||
| -rw-r--r-- | drivers/crypto/intel/qat/qat_common/adf_sysfs_rl.c | 8 |
2 files changed, 9 insertions, 0 deletions
diff --git a/drivers/crypto/intel/qat/qat_common/adf_rl.h b/drivers/crypto/intel/qat/qat_common/adf_rl.h index eb5a330f8543..269c6656fb90 100644 --- a/drivers/crypto/intel/qat/qat_common/adf_rl.h +++ b/drivers/crypto/intel/qat/qat_common/adf_rl.h @@ -79,6 +79,7 @@ struct adf_rl_interface_data { struct adf_rl_sla_input_data input; enum adf_base_services cap_rem_srv; struct rw_semaphore lock; + bool sysfs_added; }; struct adf_rl_hw_data { diff --git a/drivers/crypto/intel/qat/qat_common/adf_sysfs_rl.c b/drivers/crypto/intel/qat/qat_common/adf_sysfs_rl.c index abf9c52474ec..bedb514d4e30 100644 --- a/drivers/crypto/intel/qat/qat_common/adf_sysfs_rl.c +++ b/drivers/crypto/intel/qat/qat_common/adf_sysfs_rl.c @@ -441,11 +441,19 @@ int adf_sysfs_rl_add(struct adf_accel_dev *accel_dev) data->cap_rem_srv = ADF_SVC_NONE; data->input.srv = ADF_SVC_NONE; + data->sysfs_added = true; return ret; } void adf_sysfs_rl_rm(struct adf_accel_dev *accel_dev) { + struct adf_rl_interface_data *data; + + data = &GET_RL_STRUCT(accel_dev); + if (!data->sysfs_added) + return; + device_remove_group(&GET_DEV(accel_dev), &qat_rl_group); + data->sysfs_added = false; } |