HID: picoLCD: Improve unplug handling
Stop earlier attempting to submit new reports/URBs (though locking and
usbhid still prevents to bail out early enough to not produce multiple
hid-picolcd 0003:04D8:C002.0003: usb_submit_urb(out) failed: -19
messages in kernel log.
Strengthen framebuffer removal to be less racy.
Signed-off-by: Bruno Prémont <bonbons@linux-vserver.org>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
diff --git a/drivers/hid/hid-picolcd_core.c b/drivers/hid/hid-picolcd_core.c
index 8d5d341..2d7ef68 100644
--- a/drivers/hid/hid-picolcd_core.c
+++ b/drivers/hid/hid-picolcd_core.c
@@ -105,12 +105,17 @@
hid_set_field(report->field[i], j, k < size ? raw_data[k] : 0);
k++;
}
- data->pending = work;
- usbhid_submit_report(data->hdev, report, USB_DIR_OUT);
- spin_unlock_irqrestore(&data->lock, flags);
- wait_for_completion_interruptible_timeout(&work->ready, HZ*2);
- spin_lock_irqsave(&data->lock, flags);
- data->pending = NULL;
+ if (data->status & PICOLCD_FAILED) {
+ kfree(work);
+ work = NULL;
+ } else {
+ data->pending = work;
+ usbhid_submit_report(data->hdev, report, USB_DIR_OUT);
+ spin_unlock_irqrestore(&data->lock, flags);
+ wait_for_completion_interruptible_timeout(&work->ready, HZ*2);
+ spin_lock_irqsave(&data->lock, flags);
+ data->pending = NULL;
+ }
spin_unlock_irqrestore(&data->lock, flags);
mutex_unlock(&data->mutex);
return work;
@@ -235,6 +240,10 @@
/* perform the reset */
hid_set_field(report->field[0], 0, 1);
+ if (data->status & PICOLCD_FAILED) {
+ spin_unlock_irqrestore(&data->lock, flags);
+ return -ENODEV;
+ }
usbhid_submit_report(hdev, report, USB_DIR_OUT);
spin_unlock_irqrestore(&data->lock, flags);