[PATCH 2/2] habanalabs: enable device before hw_init()

[Oded Gabbay]

Device is now enabled before the hw_init() because part of the
initialization requires communication with the device firmware to get
information that is required for the initialization itself

Signed-off-by: Oded Gabbay <oded.gab...@gmail.com>
---
 drivers/misc/habanalabs/common/device.c | 16 ++++++++++++----
 drivers/misc/habanalabs/common/sysfs.c  |  3 +++
 2 files changed, 15 insertions(+), 4 deletions(-)

diff --git a/drivers/misc/habanalabs/common/device.c 
b/drivers/misc/habanalabs/common/device.c
index 84800efec10d..9919ff121067 100644
--- a/drivers/misc/habanalabs/common/device.c
+++ b/drivers/misc/habanalabs/common/device.c
@@ -1033,6 +1033,12 @@ int hl_device_reset(struct hl_device *hdev, bool 
hard_reset,
                }
        }
 
+       /* Device is now enabled as part of the initialization requires
+        * communication with the device firmware to get information that
+        * is required for the initialization itself
+        */
+       hdev->disabled = false;
+
        rc = hdev->asic_funcs->hw_init(hdev);
        if (rc) {
                dev_err(hdev->dev,
@@ -1040,8 +1046,6 @@ int hl_device_reset(struct hl_device *hdev, bool 
hard_reset,
                goto out_err;
        }
 
-       hdev->disabled = false;
-
        /* Check that the communication with the device is working */
        rc = hdev->asic_funcs->test_queues(hdev);
        if (rc) {
@@ -1261,6 +1265,12 @@ int hl_device_init(struct hl_device *hdev, struct class 
*hclass)
         */
        add_cdev_sysfs_on_err = true;
 
+       /* Device is now enabled as part of the initialization requires
+        * communication with the device firmware to get information that
+        * is required for the initialization itself
+        */
+       hdev->disabled = false;
+
        rc = hdev->asic_funcs->hw_init(hdev);
        if (rc) {
                dev_err(hdev->dev, "failed to initialize the H/W\n");
@@ -1268,8 +1278,6 @@ int hl_device_init(struct hl_device *hdev, struct class 
*hclass)
                goto out_disabled;
        }
 
-       hdev->disabled = false;
-
        /* Check that the communication with the device is working */
        rc = hdev->asic_funcs->test_queues(hdev);
        if (rc) {
diff --git a/drivers/misc/habanalabs/common/sysfs.c 
b/drivers/misc/habanalabs/common/sysfs.c
index 5d78d5e1c782..c4e7c682d584 100644
--- a/drivers/misc/habanalabs/common/sysfs.c
+++ b/drivers/misc/habanalabs/common/sysfs.c
@@ -334,6 +334,9 @@ static ssize_t eeprom_read_handler(struct file *filp, 
struct kobject *kobj,
        char *data;
        int rc;
 
+       if (hl_device_disabled_or_in_reset(hdev))
+               return -ENODEV;
+
        if (!max_size)
                return -EINVAL;
 
-- 
2.17.1