On Wed, 2025-03-19 at 00:29 -0700, Bao D. Nguyen wrote: > > External email : Please do not click links or open attachments until > you have verified the sender or the content. > > > The ufs device JEDEC specification version 4.1 adds support for the > device level exception events. To support this new device level > exception feature, expose two new sysfs nodes below to provide > the user space access to the device level exception information. > /sys/bus/platform/drivers/ufshcd/*/device_lvl_exception_count > /sys/bus/platform/drivers/ufshcd/*/device_lvl_exception_id > > The device_lvl_exception_count sysfs node reports the number of > device level exceptions that have occurred since the last time > this variable is reset. Writing a value of 0 will reset it. > The device_lvl_exception_id reports the exception ID which is the > qDeviceLevelExceptionID attribute of the device JEDEC specifications > version 4.1 and later. The user space application can query these > sysfs nodes to get more information about the device level exception. > > Signed-off-by: Bao D. Nguyen <quic_nguyenb@xxxxxxxxxxx> > Reviewed-by: Peter Wang <peter.wang@xxxxxxxxxxxx> > --- > Changes in v3: > 1. Add protection for hba->dev_lvl_exception_count accesses in > different > contexts (Bart's comment). Hi Bao, Could use atomic_t for counter protect? Thanks. Peter
