From 8e5654ce6914b950b42d1f896f3d8a75fbf307ae Mon Sep 17 00:00:00 2001 From: Jiri Kosina Date: Fri, 9 Aug 2013 11:34:19 +0200 Subject: [PATCH] Revert "HID: hid-logitech-dj: querying_devices was never set" MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit This reverts commit 407a2c2a4d85100c8c67953e4bac2f4a6c942335. Explanation provided by Benjamin Tissoires: Commit "HID: hid-logitech-dj, querying_devices was never set" activate a flag which guarantees that we do not ask the receiver for too many enumeration. When the flag is set, each following enumeration call is discarded (the usb request is not forwarded to the receiver). The flag is then released when the driver receive a pairing information event, which normally follows the enumeration request. However, the USB3 bug makes the driver think the enumeration request has been forwarded to the receiver. However, it is actually not the case because the USB stack returns -EPIPE. So, when a new unknown device appears, the workaround consisting in asking for a new enumeration is not working anymore: this new enumeration is discarded because of the flag, which is never reset. A solution could be to trigger a timeout before releasing it, but for now, let's just revert the patch. Reported-by: Benjamin Tissoires Tested-by: Sune Mølgaard Signed-off-by: Jiri Kosina --- drivers/hid/hid-logitech-dj.c | 2 -- 1 file changed, 2 deletions(-) diff --git a/drivers/hid/hid-logitech-dj.c b/drivers/hid/hid-logitech-dj.c index 7a5764843bfb..cd33084c7860 100644 --- a/drivers/hid/hid-logitech-dj.c +++ b/drivers/hid/hid-logitech-dj.c @@ -488,8 +488,6 @@ static int logi_dj_recv_query_paired_devices(struct dj_receiver_dev *djrcv_dev) if (djrcv_dev->querying_devices) return 0; - djrcv_dev->querying_devices = true; - dj_report = kzalloc(sizeof(struct dj_report), GFP_KERNEL); if (!dj_report) return -ENOMEM; -- 2.39.2