Merge branch 'for-5.9/core-v2' into for-linus

- fix for some modern devices that return multi-byte battery report, from
  Grant Likely
- fix for devices with Resolution Multiplier, from Peter Hutterer
- device probing speed increase, from Dmitry Torokhov

3 files changed, 55 insertions, 38 deletions

diff --git a/drivers/hid/hid-input.c b/drivers/hid/hid-input.c
index dea9cc65bf80..b8eabf206e74 100644
--- a/drivers/hid/hid-input.c
+++ b/drivers/hid/hid-input.c
@@ -350,13 +350,13 @@ static int hidinput_query_battery_capacity(struct hid_device *dev)
 	u8 *buf;
 	int ret;
 
-	buf = kmalloc(2, GFP_KERNEL);
+	buf = kmalloc(4, GFP_KERNEL);
 	if (!buf)
 		return -ENOMEM;
 
-	ret = hid_hw_raw_request(dev, dev->battery_report_id, buf, 2,
+	ret = hid_hw_raw_request(dev, dev->battery_report_id, buf, 4,
 				 dev->battery_report_type, HID_REQ_GET_REPORT);
-	if (ret != 2) {
+	if (ret < 2) {
 		kfree(buf);
 		return -ENODATA;
 	}
@@ -1560,21 +1560,12 @@ static bool __hidinput_change_resolution_multipliers(struct hid_device *hid,
 {
 	struct hid_usage *usage;
 	bool update_needed = false;
+	bool get_report_completed = false;
 	int i, j;
 
 	if (report->maxfield == 0)
 		return false;
 
-	/*
-	 * If we have more than one feature within this report we
-	 * need to fill in the bits from the others before we can
-	 * overwrite the ones for the Resolution Multiplier.
-	 */
-	if (report->maxfield > 1) {
-		hid_hw_request(hid, report, HID_REQ_GET_REPORT);
-		hid_hw_wait(hid);
-	}
-
 	for (i = 0; i < report->maxfield; i++) {
 		__s32 value = use_logical_max ?
 			      report->field[i]->logical_maximum :
@@ -1593,6 +1584,25 @@ static bool __hidinput_change_resolution_multipliers(struct hid_device *hid,
 			if (usage->hid != HID_GD_RESOLUTION_MULTIPLIER)
 				continue;
 
+			/*
+			 * If we have more than one feature within this
+			 * report we need to fill in the bits from the
+			 * others before we can overwrite the ones for the
+			 * Resolution Multiplier.
+			 *
+			 * But if we're not allowed to read from the device,
+			 * we just bail. Such a device should not exist
+			 * anyway.
+			 */
+			if (!get_report_completed && report->maxfield > 1) {
+				if (hid->quirks & HID_QUIRK_NO_INIT_REPORTS)
+					return update_needed;
+
+				hid_hw_request(hid, report, HID_REQ_GET_REPORT);
+				hid_hw_wait(hid);
+				get_report_completed = true;
+			}
+
 			report->field[i]->value[j] = value;
 			update_needed = true;
 		}
diff --git a/drivers/hid/usbhid/hid-core.c b/drivers/hid/usbhid/hid-core.c
index 17a638f15082..492dd641a25d 100644
--- a/drivers/hid/usbhid/hid-core.c
+++ b/drivers/hid/usbhid/hid-core.c
@@ -26,6 +26,7 @@
 #include <linux/wait.h>
 #include <linux/workqueue.h>
 #include <linux/string.h>
+#include <linux/timekeeping.h>
 
 #include <linux/usb.h>
 
@@ -95,6 +96,18 @@ static int hid_start_in(struct hid_device *hid)
 				set_bit(HID_NO_BANDWIDTH, &usbhid->iofl);
 		} else {
 			clear_bit(HID_NO_BANDWIDTH, &usbhid->iofl);
+
+			if (test_bit(HID_RESUME_RUNNING, &usbhid->iofl)) {
+				/*
+				 * In case events are generated while nobody was
+				 * listening, some are released when the device
+				 * is re-opened. Wait 50 msec for the queue to
+				 * empty before allowing events to go through
+				 * hid.
+				 */
+				usbhid->input_start_time =
+					ktime_add_ms(ktime_get_coarse(), 50);
+			}
 		}
 	}
 	spin_unlock_irqrestore(&usbhid->lock, flags);
@@ -280,20 +293,23 @@ static void hid_irq_in(struct urb *urb)
 		if (!test_bit(HID_OPENED, &usbhid->iofl))
 			break;
 		usbhid_mark_busy(usbhid);
-		if (!test_bit(HID_RESUME_RUNNING, &usbhid->iofl)) {
-			hid_input_report(urb->context, HID_INPUT_REPORT,
-					 urb->transfer_buffer,
-					 urb->actual_length, 1);
-			/*
-			 * autosuspend refused while keys are pressed
-			 * because most keyboards don't wake up when
-			 * a key is released
-			 */
-			if (hid_check_keys_pressed(hid))
-				set_bit(HID_KEYS_PRESSED, &usbhid->iofl);
-			else
-				clear_bit(HID_KEYS_PRESSED, &usbhid->iofl);
+		if (test_bit(HID_RESUME_RUNNING, &usbhid->iofl)) {
+			if (ktime_before(ktime_get_coarse(),
+					 usbhid->input_start_time))
+				break;
+			clear_bit(HID_RESUME_RUNNING, &usbhid->iofl);
 		}
+		hid_input_report(urb->context, HID_INPUT_REPORT,
+				 urb->transfer_buffer, urb->actual_length, 1);
+		/*
+		 * autosuspend refused while keys are pressed
+		 * because most keyboards don't wake up when
+		 * a key is released
+		 */
+		if (hid_check_keys_pressed(hid))
+			set_bit(HID_KEYS_PRESSED, &usbhid->iofl);
+		else
+			clear_bit(HID_KEYS_PRESSED, &usbhid->iofl);
 		break;
 	case -EPIPE:		/* stall */
 		usbhid_mark_busy(usbhid);
@@ -720,17 +736,6 @@ static int usbhid_open(struct hid_device *hid)
 
 	usb_autopm_put_interface(usbhid->intf);
 
-	/*
-	 * In case events are generated while nobody was listening,
-	 * some are released when the device is re-opened.
-	 * Wait 50 msec for the queue to empty before allowing events
-	 * to go through hid.
-	 */
-	if (res == 0)
-		msleep(50);
-
-	clear_bit(HID_RESUME_RUNNING, &usbhid->iofl);
-
  Done:
 	mutex_unlock(&usbhid->mutex);
 	return res;
@@ -1667,7 +1672,7 @@ struct usb_interface *usbhid_find_interface(int minor)
 
 static int __init hid_init(void)
 {
-	int retval = -ENOMEM;
+	int retval;
 
 	retval = hid_quirks_init(quirks_param, BUS_USB, MAX_USBHID_BOOT_QUIRKS);
 	if (retval)
diff --git a/drivers/hid/usbhid/usbhid.h b/drivers/hid/usbhid/usbhid.h
index 75fe85d3d27a..c6ad684d099a 100644
--- a/drivers/hid/usbhid/usbhid.h
+++ b/drivers/hid/usbhid/usbhid.h
@@ -13,6 +13,7 @@
 
 #include <linux/types.h>
 #include <linux/slab.h>
+#include <linux/ktime.h>
 #include <linux/list.h>
 #include <linux/mutex.h>
 #include <linux/timer.h>
@@ -83,6 +84,7 @@ struct usbhid_device {
 	struct mutex mutex;						/* start/stop/open/close */
 	spinlock_t lock;						/* fifo spinlock */
 	unsigned long iofl;                                             /* I/O flags (CTRL_RUNNING, OUT_RUNNING) */
+	ktime_t input_start_time;					/* When to start handling input */
 	struct timer_list io_retry;                                     /* Retry timer */
 	unsigned long stop_retry;                                       /* Time to give up, in jiffies */
 	unsigned int retry_delay;                                       /* Delay length in ms */