Commit f74346a0 authored by Srinivas Pandruvada's avatar Srinivas Pandruvada Committed by Jiri Kosina

HID: hid-sensor-hub: fix sleeping function called from invalid context

Fix issue with the sleeping calling hid_hw_request under spinlock.
When i2c is used as HID transport, this is calling kmalloc, which
can sleep. So remove call to this function while under spinlock.
 [ 1067.021961] Call Trace:
 [ 1067.021970]  [<ffffffff8192f5f2>] dump_stack+0x4d/0x6f
 [ 1067.021976]  [<ffffffff811109f2>] __might_sleep+0xd2/0xf0
 [ 1067.021981]  [<ffffffff811ea15b>] __kmalloc+0xeb/0x200
 [ 1067.021989]  [<ffffffff816e0cb3>] ? hid_alloc_report_buf+0x23/0x30
 [ 1067.021993]  [<ffffffff816e0cb3>] hid_alloc_report_buf+0x23/0x30
 [ 1067.021997]  [<ffffffff816f4cb7>] i2c_hid_request+0x57/0x110
 [ 1067.022006]  [<ffffffffa02bc61c>] sensor_hub_input_attr_get_raw_value+0xbc/0x100 [hid_sensor_hub]
Signed-off-by: default avatarSrinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: default avatarJiri Kosina <jkosina@suse.cz>
parent 6b5625b2
......@@ -260,13 +260,12 @@ int sensor_hub_input_attr_get_raw_value(struct hid_sensor_hub_device *hsdev,
spin_lock_irqsave(&data->lock, flags);
data->pending.status = true;
spin_unlock_irqrestore(&data->lock, flags);
report = sensor_hub_report(report_id, hsdev->hdev, HID_INPUT_REPORT);
if (!report) {
spin_unlock_irqrestore(&data->lock, flags);
if (!report)
goto err_free;
}
hid_hw_request(hsdev->hdev, report, HID_REQ_GET_REPORT);
spin_unlock_irqrestore(&data->lock, flags);
wait_for_completion_interruptible_timeout(&data->pending.ready, HZ*5);
switch (data->pending.raw_size) {
case 1:
......
Markdown is supported
0%
or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment