diff options
| author | Dexuan Cui <decui@microsoft.com> | 2019-11-20 10:14:56 +0300 |
|---|---|---|
| committer | Sasha Levin <sashal@kernel.org> | 2019-11-22 04:10:45 +0300 |
| commit | af13f9ed6f9aa6801d020c48aeb19dca9f0d4f97 (patch) | |
| tree | a8b1784bd720573612cb60dbdd6daa51987e9e94 /drivers/hid | |
| parent | 25bd2b2f1f05347a4cd633138d0e4c2fd5788359 (diff) | |
| download | linux-af13f9ed6f9aa6801d020c48aeb19dca9f0d4f97.tar.xz | |
HID: hyperv: Add the support of hibernation
During the suspend process and resume process, if there is any mouse
event, there is a small chance the suspend and the resume process can be
aborted because of mousevsc_on_receive() -> pm_wakeup_hard_event().
This behavior can be avoided by disabling the Hyper-V mouse device as
a wakeup source:
echo disabled > /sys/bus/vmbus/drivers/hid_hyperv/XXX/power/wakeup
(XXX is the device's GUID).
Signed-off-by: Dexuan Cui <decui@microsoft.com>
Acked-by: Jiri Kosina <jkosina@suse.cz>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'drivers/hid')
| -rw-r--r-- | drivers/hid/hid-hyperv.c | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/drivers/hid/hid-hyperv.c b/drivers/hid/hid-hyperv.c index 79a28fc91521..dddfca555df9 100644 --- a/drivers/hid/hid-hyperv.c +++ b/drivers/hid/hid-hyperv.c @@ -192,6 +192,9 @@ static void mousevsc_on_receive_device_info(struct mousevsc_dev *input_device, if (desc->bLength == 0) goto cleanup; + /* The pointer is not NULL when we resume from hibernation */ + if (input_device->hid_desc != NULL) + kfree(input_device->hid_desc); input_device->hid_desc = kmemdup(desc, desc->bLength, GFP_ATOMIC); if (!input_device->hid_desc) @@ -203,6 +206,9 @@ static void mousevsc_on_receive_device_info(struct mousevsc_dev *input_device, goto cleanup; } + /* The pointer is not NULL when we resume from hibernation */ + if (input_device->report_desc != NULL) + kfree(input_device->report_desc); input_device->report_desc = kzalloc(input_device->report_desc_size, GFP_ATOMIC); @@ -342,6 +348,8 @@ static int mousevsc_connect_to_vsp(struct hv_device *device) struct mousevsc_prt_msg *request; struct mousevsc_prt_msg *response; + reinit_completion(&input_dev->wait_event); + request = &input_dev->protocol_req; memset(request, 0, sizeof(struct mousevsc_prt_msg)); @@ -541,6 +549,30 @@ static int mousevsc_remove(struct hv_device *dev) return 0; } +static int mousevsc_suspend(struct hv_device *dev) +{ + vmbus_close(dev->channel); + + return 0; +} + +static int mousevsc_resume(struct hv_device *dev) +{ + int ret; + + ret = vmbus_open(dev->channel, + INPUTVSC_SEND_RING_BUFFER_SIZE, + INPUTVSC_RECV_RING_BUFFER_SIZE, + NULL, 0, + mousevsc_on_channel_callback, + dev); + if (ret) + return ret; + + ret = mousevsc_connect_to_vsp(dev); + return ret; +} + static const struct hv_vmbus_device_id id_table[] = { /* Mouse guid */ { HV_MOUSE_GUID, }, @@ -554,6 +586,8 @@ static struct hv_driver mousevsc_drv = { .id_table = id_table, .probe = mousevsc_probe, .remove = mousevsc_remove, + .suspend = mousevsc_suspend, + .resume = mousevsc_resume, .driver = { .probe_type = PROBE_PREFER_ASYNCHRONOUS, }, |