From: Oded Gabbay <ogabbay@kernel.org>
To: linux-kernel@vger.kernel.org
Cc: SW_Drivers@habana.ai, Ofir Bitton <obitton@habana.ai>
Subject: [PATCH] habanalabs: put devices before driver removal
Date: Mon, 30 Nov 2020 10:29:32 +0200 [thread overview]
Message-ID: <20201130082932.557-1-ogabbay@kernel.org> (raw)
From: Ofir Bitton <obitton@habana.ai>
Driver never puts its device and control_device objects, hence
a memory leak is introduced every driver removal.
Signed-off-by: Ofir Bitton <obitton@habana.ai>
Reviewed-by: Oded Gabbay <ogabbay@kernel.org>
Signed-off-by: Oded Gabbay <ogabbay@kernel.org>
---
drivers/misc/habanalabs/common/device.c | 16 ++++++++--------
1 file changed, 8 insertions(+), 8 deletions(-)
diff --git a/drivers/misc/habanalabs/common/device.c b/drivers/misc/habanalabs/common/device.c
index 20572224099a..783bbdcb1e61 100644
--- a/drivers/misc/habanalabs/common/device.c
+++ b/drivers/misc/habanalabs/common/device.c
@@ -231,16 +231,16 @@ static int device_cdev_sysfs_add(struct hl_device *hdev)
static void device_cdev_sysfs_del(struct hl_device *hdev)
{
- /* device_release() won't be called so must free devices explicitly */
- if (!hdev->cdev_sysfs_created) {
- kfree(hdev->dev_ctrl);
- kfree(hdev->dev);
- return;
- }
+ if (!hdev->cdev_sysfs_created)
+ goto put_devices;
hl_sysfs_fini(hdev);
cdev_device_del(&hdev->cdev_ctrl, hdev->dev_ctrl);
cdev_device_del(&hdev->cdev, hdev->dev);
+
+put_devices:
+ put_device(hdev->dev);
+ put_device(hdev->dev_ctrl);
}
/*
@@ -1371,9 +1371,9 @@ int hl_device_init(struct hl_device *hdev, struct class *hclass)
early_fini:
device_early_fini(hdev);
free_dev_ctrl:
- kfree(hdev->dev_ctrl);
+ put_device(hdev->dev_ctrl);
free_dev:
- kfree(hdev->dev);
+ put_device(hdev->dev);
out_disabled:
hdev->disabled = true;
if (add_cdev_sysfs_on_err)
--
2.17.1
reply other threads:[~2020-11-30 8:30 UTC|newest]
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