| Message ID | 20231121170046.8097-1-damian.muszynski@intel.com (mailing list archive) |
|---|---|
| State | Accepted |
| Delegated to: | Herbert Xu |
| Headers | show |
| Series | crypto: qat - add sysfs_added flag for ras | expand |
On Tue, Nov 21, 2023 at 05:59:45PM +0100, Damian Muszynski wrote: > The qat_ras 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_ras 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_ras' not found for kobject '0000:6b:00.0' > ... > sysfs_remove_groups+0x29/0x50 > adf_sysfs_stop_ras+0x4b/0x80 [intel_qat] > adf_dev_stop+0x43/0x1d0 [intel_qat] > adf_dev_down+0x4b/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: 532d7f6bc458 ("crypto: qat - add error counters") > 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> > --- > drivers/crypto/intel/qat/qat_common/adf_accel_devices.h | 1 + > .../crypto/intel/qat/qat_common/adf_sysfs_ras_counters.c | 7 ++++++- > 2 files changed, 7 insertions(+), 1 deletion(-) Patch applied. Thanks.
diff --git a/drivers/crypto/intel/qat/qat_common/adf_accel_devices.h b/drivers/crypto/intel/qat/qat_common/adf_accel_devices.h index 4ff5729a3496..9d5fdd529a2e 100644 --- a/drivers/crypto/intel/qat/qat_common/adf_accel_devices.h +++ b/drivers/crypto/intel/qat/qat_common/adf_accel_devices.h @@ -92,6 +92,7 @@ enum ras_errors { struct adf_error_counters { atomic_t counter[ADF_RAS_ERRORS]; + bool sysfs_added; bool enabled; }; diff --git a/drivers/crypto/intel/qat/qat_common/adf_sysfs_ras_counters.c b/drivers/crypto/intel/qat/qat_common/adf_sysfs_ras_counters.c index cffe2d722995..e97c67c87b3c 100644 --- a/drivers/crypto/intel/qat/qat_common/adf_sysfs_ras_counters.c +++ b/drivers/crypto/intel/qat/qat_common/adf_sysfs_ras_counters.c @@ -99,6 +99,8 @@ void adf_sysfs_start_ras(struct adf_accel_dev *accel_dev) if (device_add_group(&GET_DEV(accel_dev), &qat_ras_group)) dev_err(&GET_DEV(accel_dev), "Failed to create qat_ras attribute group.\n"); + + accel_dev->ras_errors.sysfs_added = true; } void adf_sysfs_stop_ras(struct adf_accel_dev *accel_dev) @@ -106,7 +108,10 @@ void adf_sysfs_stop_ras(struct adf_accel_dev *accel_dev) if (!accel_dev->ras_errors.enabled) return; - device_remove_group(&GET_DEV(accel_dev), &qat_ras_group); + if (accel_dev->ras_errors.sysfs_added) { + device_remove_group(&GET_DEV(accel_dev), &qat_ras_group); + accel_dev->ras_errors.sysfs_added = false; + } ADF_RAS_ERR_CTR_CLEAR(accel_dev->ras_errors); }
The qat_ras 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_ras 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_ras' not found for kobject '0000:6b:00.0' ... sysfs_remove_groups+0x29/0x50 adf_sysfs_stop_ras+0x4b/0x80 [intel_qat] adf_dev_stop+0x43/0x1d0 [intel_qat] adf_dev_down+0x4b/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: 532d7f6bc458 ("crypto: qat - add error counters") 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> --- drivers/crypto/intel/qat/qat_common/adf_accel_devices.h | 1 + .../crypto/intel/qat/qat_common/adf_sysfs_ras_counters.c | 7 ++++++- 2 files changed, 7 insertions(+), 1 deletion(-) base-commit: f36285cc1e99472bb4c6741981594a5934ad4c4e prerequisite-patch-id: 1375fd7754ab07f7e90594b4f4893487400a7052