7269cba5 - tee: optee: Fix supplicant based device enumeration

Thu, 02 Nov 2023 07:30:55 +0000

tee: optee: Fix supplicant based device enumerationCurrently supplicant dependent optee device enumeration only registersdevices whenever tee-supplicant is invoked for the first time. But itforgets to remove devices when tee-supplicant daemon stops running andcloses its context gracefully. This leads to following error for fTPMdriver during reboot/shutdown:[ 73.466791] tpm tpm0: ftpm_tee_tpm_op_send: SUBMIT_COMMAND invoke error: 0xffff3024Fix this by adding an attribute for supplicant dependent devices so thatthe user-space service can detect and detach supplicant devices beforeclosing the supplicant:$ for dev in /sys/bus/tee/devices/*; do if [[ -f "$dev/need_supplicant" && -f "$dev/driver/unbind" ]]; \ then echo $(basename "$dev") > $dev/driver/unbind; fi doneReported-by: Jan Kiszka Closes: https://github.com/OP-TEE/optee_os/issues/6094Fixes: 5f178bb71e3a ("optee: enable support for multi-stage bus enumeration")Signed-off-by: Sumit Garg Reviewed-by: Ilias Apalodimas Acked-by: Jerome Forissier [jw: fixed up Date documentation]Signed-off-by: Jens Wiklander List of files: /linux-6.15/Documentation/ABI/testing/sysfs-bus-optee-devices

58df195c - optee: use uuid for sysfs driver entry

Thu, 18 Jun 2020 13:52:49 +0000

optee: use uuid for sysfs driver entryWith the evolving use-cases for TEE bus, now it's required to supportmulti-stage enumeration process. But using a simple index doesn'tsuffice this requirement and instead leads to duplicate sysfs entries.So instead switch to use more informative device UUID for sysfs entrylike:/sys/bus/tee/devices/optee-ta-Signed-off-by: Maxim Uvarov Reviewed-by: Sumit Garg Reviewed-by: Jarkko Sakkinen Tested-by: Sumit Garg Signed-off-by: Jens Wiklander List of files: /linux-6.15/Documentation/ABI/testing/sysfs-bus-optee-devices

Changes in sysfs-bus-optee-devices

7269cba5 - tee: optee: Fix supplicant based device enumeration

58df195c - optee: use uuid for sysfs driver entry