linux-kernel - [PATCHv3 2/3] optee: use uuid for sysfs driver entry

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Message-Id: <20200525115235.5405-3-maxim.uvarov@linaro.org>
Date:   Mon, 25 May 2020 14:52:34 +0300
From:   Maxim Uvarov <maxim.uvarov@...aro.org>
To:     linux-kernel@...r.kernel.org, tee-dev@...ts.linaro.org
Cc:     peterhuewe@....de, jarkko.sakkinen@...ux.intel.com, jgg@...pe.ca,
        gregkh@...uxfoundation.org, jens.wiklander@...aro.org,
        linux-integrity@...r.kernel.org, arnd@...aro.org,
        sumit.garg@...aro.org, Maxim Uvarov <maxim.uvarov@...aro.org>
Subject: [PATCHv3 2/3] optee: use uuid for sysfs driver entry

Optee device names for sysfs needed to be unique
and it's better if they will mean something. UUID for name
looks like good solution:
/sys/bus/tee/devices/optee-clnt-<uuid>

Signed-off-by: Maxim Uvarov <maxim.uvarov@...aro.org>
---
 drivers/tee/optee/device.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/tee/optee/device.c b/drivers/tee/optee/device.c
index d4931dad07aa..aab917605e74 100644
--- a/drivers/tee/optee/device.c
+++ b/drivers/tee/optee/device.c
@@ -65,7 +65,7 @@ static int get_devices(struct tee_context *ctx, u32 session,
 	return 0;
 }
 
-static int optee_register_device(const uuid_t *device_uuid, u32 device_id)
+static int optee_register_device(const uuid_t *device_uuid)
 {
 	struct tee_client_device *optee_device = NULL;
 	int rc;
@@ -75,7 +75,7 @@ static int optee_register_device(const uuid_t *device_uuid, u32 device_id)
 		return -ENOMEM;
 
 	optee_device->dev.bus = &tee_bus_type;
-	dev_set_name(&optee_device->dev, "optee-clnt%u", device_id);
+	dev_set_name(&optee_device->dev, "optee-clnt-%pUl", device_uuid);
 	uuid_copy(&optee_device->id.uuid, device_uuid);
 
 	rc = device_register(&optee_device->dev);
@@ -144,7 +144,7 @@ static int __optee_enumerate_devices(u32 func)
 	num_devices = shm_size / sizeof(uuid_t);
 
 	for (idx = 0; idx < num_devices; idx++) {
-		rc = optee_register_device(&device_uuid[idx], idx);
+		rc = optee_register_device(&device_uuid[idx]);
 		if (rc)
 			goto out_shm;
 	}
-- 
2.17.1