[5/5] HID: hid-sony.c: Use devm_ api to simplify sc->output_report_dmabuf

Commit Message

Hanno Zulla June 14, 2018, 2:32 p.m. UTC

HID: hid-sony.c: Use devm_ api to simplify sc->output_report_dmabuf

Using devm_ calls, the resources of the Sony game devices's features are
tied to the main device handle, making it easier to handle errors and
teardown inside the device driver. Altogether, this reduces complexity
of the driver source.

Signed-off-by: Hanno Zulla <[e-mail]>
---
 drivers/hid/hid-sony.c | 15 ++++++++-------
 1 file changed, 8 insertions(+), 7 deletions(-)

Patch

diff --git a/drivers/hid/hid-sony.c b/drivers/hid/hid-sony.c
index 9abdd77f16c9..9671a4bad643 100644
--- a/drivers/hid/hid-sony.c
+++ b/drivers/hid/hid-sony.c
@@ -2202,16 +2202,20 @@  static int sony_allocate_output_report(struct sony_sc *sc)
 	if ((sc->quirks & SIXAXIS_CONTROLLER) ||
 			(sc->quirks & NAVIGATION_CONTROLLER))
 		sc->output_report_dmabuf =
-			kmalloc(sizeof(union sixaxis_output_report_01),
+			devm_kmalloc(&sc->hdev->dev,
+				sizeof(union sixaxis_output_report_01),
 				GFP_KERNEL);
 	else if (sc->quirks & DUALSHOCK4_CONTROLLER_BT)
-		sc->output_report_dmabuf = kmalloc(DS4_OUTPUT_REPORT_0x11_SIZE,
+		sc->output_report_dmabuf = devm_kmalloc(&sc->hdev->dev,
+						DS4_OUTPUT_REPORT_0x11_SIZE,
 						GFP_KERNEL);
 	else if (sc->quirks & (DUALSHOCK4_CONTROLLER_USB | DUALSHOCK4_DONGLE))
-		sc->output_report_dmabuf = kmalloc(DS4_OUTPUT_REPORT_0x05_SIZE,
+		sc->output_report_dmabuf = devm_kmalloc(&sc->hdev->dev,
+						DS4_OUTPUT_REPORT_0x05_SIZE,
 						GFP_KERNEL);
 	else if (sc->quirks & MOTION_CONTROLLER)
-		sc->output_report_dmabuf = kmalloc(MOTION_REPORT_0x02_SIZE,
+		sc->output_report_dmabuf = devm_kmalloc(&sc->hdev->dev,
+						MOTION_REPORT_0x02_SIZE,
 						GFP_KERNEL);
 	else
 		return 0;
@@ -2791,7 +2795,6 @@  static int sony_input_configured(struct hid_device *hdev,
 	if (sc->hw_version)
 		device_remove_file(&sc->hdev->dev, &dev_attr_hardware_version);
 	sony_cancel_work_sync(sc);
-	kfree(sc->output_report_dmabuf);
 	sony_remove_dev_list(sc);
 	sony_release_device_id(sc);
 	hid_hw_stop(hdev);
@@ -2879,8 +2882,6 @@  static void sony_remove(struct hid_device *hdev)
 
 	sony_cancel_work_sync(sc);
 
-	kfree(sc->output_report_dmabuf);
-
 	sony_remove_dev_list(sc);
 
 	sony_release_device_id(sc);