Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 3ccfd0a8 authored by David Herrmann's avatar David Herrmann Committed by Jiri Kosina
Browse files

HID: hyperv: make sure input buffer is big enough 



We need at least HID_MAX_BUFFER_SIZE (4096) bytes as input buffer. HID
core depends on this as it requires every input report to be at least as
big as advertised.

Signed-off-by: default avatarDavid Herrmann <dh.herrmann@gmail.com>
Signed-off-by: default avatarK. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: default avatarJiri Kosina <jkosina@suse.cz>
parent a4b1b587

drivers/hid/hid-hyperv.c

+8 −3
Original line number Diff line number Diff line
@@ -157,6 +157,7 @@ struct mousevsc_dev { 
	u32			report_desc_size;

	struct hv_input_dev_info hid_dev_info;

	struct hid_device       *hid_device;

	u8			input_buf[HID_MAX_BUFFER_SIZE];

};
@@ -256,6 +257,7 @@ static void mousevsc_on_receive(struct hv_device *device, 
	struct synthhid_msg *hid_msg;

	struct mousevsc_dev *input_dev = hv_get_drvdata(device);

	struct synthhid_input_report *input_report;

	size_t len;



	pipe_msg = (struct pipe_prt_msg *)((unsigned long)packet +

						(packet->offset8 << 3));
@@ -300,9 +302,12 @@ static void mousevsc_on_receive(struct hv_device *device, 
			(struct synthhid_input_report *)pipe_msg->data;

		if (!input_dev->init_complete)

			break;

		hid_input_report(input_dev->hid_device,

				HID_INPUT_REPORT, input_report->buffer,

				input_report->header.size, 1);



		len = min(input_report->header.size,

			  (u32)sizeof(input_dev->input_buf));

		memcpy(input_dev->input_buf, input_report->buffer, len);

		hid_input_report(input_dev->hid_device, HID_INPUT_REPORT,

				 input_dev->input_buf, len, 1);

		break;

	default:

		pr_err("unsupported hid msg type - type %d len %d",