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: David Herrmann <dh.herrmann@gmail.com> Signed-off-by: K. Y. Srinivasan <kys@microsoft.com> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
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@ -157,6 +157,7 @@ struct mousevsc_dev {
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u32 report_desc_size;
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struct hv_input_dev_info hid_dev_info;
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struct hid_device *hid_device;
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u8 input_buf[HID_MAX_BUFFER_SIZE];
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};
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@ -256,6 +257,7 @@ static void mousevsc_on_receive(struct hv_device *device,
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struct synthhid_msg *hid_msg;
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struct mousevsc_dev *input_dev = hv_get_drvdata(device);
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struct synthhid_input_report *input_report;
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size_t len;
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pipe_msg = (struct pipe_prt_msg *)((unsigned long)packet +
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(packet->offset8 << 3));
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@ -300,9 +302,12 @@ static void mousevsc_on_receive(struct hv_device *device,
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(struct synthhid_input_report *)pipe_msg->data;
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if (!input_dev->init_complete)
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break;
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hid_input_report(input_dev->hid_device,
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HID_INPUT_REPORT, input_report->buffer,
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input_report->header.size, 1);
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len = min(input_report->header.size,
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(u32)sizeof(input_dev->input_buf));
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memcpy(input_dev->input_buf, input_report->buffer, len);
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hid_input_report(input_dev->hid_device, HID_INPUT_REPORT,
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input_dev->input_buf, len, 1);
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break;
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default:
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pr_err("unsupported hid msg type - type %d len %d",
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