Messages in this thread Patch in this message | | | From | Michał Kępień <> | Subject | [PATCH 06/10] platform/x86: fujitsu-laptop: allocate struct fujitsu_bl in acpi_fujitsu_bl_add() | Date | Mon, 24 Apr 2017 15:33:30 +0200 |
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Only allocate memory for struct fujitsu_bl when the FUJ02B1 ACPI device is present. Use devm_kzalloc() for allocating memory to simplify cleanup.
Until all backlight-related code is modified to only use device-specific data, the pointer to the allocated memory still has to be stored in a module-wide variable.
Signed-off-by: Michał Kępień <kernel@kempniu.pl> --- drivers/platform/x86/fujitsu-laptop.c | 18 ++++++++---------- 1 file changed, 8 insertions(+), 10 deletions(-)
diff --git a/drivers/platform/x86/fujitsu-laptop.c b/drivers/platform/x86/fujitsu-laptop.c index 536b601c7067..780e11b43d27 100644 --- a/drivers/platform/x86/fujitsu-laptop.c +++ b/drivers/platform/x86/fujitsu-laptop.c @@ -417,6 +417,7 @@ static int fujitsu_backlight_register(struct acpi_device *device) static int acpi_fujitsu_bl_add(struct acpi_device *device) { + struct fujitsu_bl *priv; int state = 0; int error; @@ -426,10 +427,15 @@ static int acpi_fujitsu_bl_add(struct acpi_device *device) if (!device) return -EINVAL; + priv = devm_kzalloc(&device->dev, sizeof(*priv), GFP_KERNEL); + if (!priv) + return -ENOMEM; + + fujitsu_bl = priv; fujitsu_bl->handle = device->handle; sprintf(acpi_device_name(device), "%s", ACPI_FUJITSU_BL_DEVICE_NAME); sprintf(acpi_device_class(device), "%s", ACPI_FUJITSU_CLASS); - device->driver_data = fujitsu_bl; + device->driver_data = priv; error = acpi_fujitsu_bl_input_setup(device); if (error) @@ -1018,13 +1024,9 @@ static int __init fujitsu_init(void) if (acpi_disabled) return -ENODEV; - fujitsu_bl = kzalloc(sizeof(struct fujitsu_bl), GFP_KERNEL); - if (!fujitsu_bl) - return -ENOMEM; - ret = acpi_bus_register_driver(&acpi_fujitsu_bl_driver); if (ret) - goto err_free_fujitsu_bl; + return ret; /* Register platform stuff */ @@ -1054,8 +1056,6 @@ static int __init fujitsu_init(void) platform_driver_unregister(&fujitsu_pf_driver); err_unregister_acpi: acpi_bus_unregister_driver(&acpi_fujitsu_bl_driver); -err_free_fujitsu_bl: - kfree(fujitsu_bl); return ret; } @@ -1070,8 +1070,6 @@ static void __exit fujitsu_cleanup(void) acpi_bus_unregister_driver(&acpi_fujitsu_bl_driver); - kfree(fujitsu_bl); - pr_info("driver unloaded\n"); } -- 2.12.2
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