shinys000114/linux
1
0
Fork 0
mirror of https://github.com/hardkernel/linux.git synced 2026-06-07 19:30:30 +09:00
Code Issues Packages Projects Releases Wiki Activity

usb: Increase quirk delay for USB devices

Browse Source 
commit b2a542bbb3 upstream.

Commit e0429362ab
("usb: Add device quirk for Logitech HD Pro Webcams C920 and C930e")
introduced quirk to workaround an issue with some Logitech webcams.

The workaround is introducing delay for some USB operations.

According to our testing, delay introduced by original commit
is not long enough and in rare cases we still see issues described
by the aforementioned commit.

This patch increases delays introduced by original commit.
Having this patch applied we do not see those problems anymore.

Signed-off-by: Dmitry Fleytman <dmitry@daynix.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Dmitry Fleytman
2017-09-05 11:40:56 +03:00
committed by Greg Kroah-Hartman
parent 767f7a2cf3
commit 43feb29db4
2 changed files with 2 additions and 2 deletions
Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/usb/core/config.c
View File

@@ -847,7 +847,7 @@ int usb_get_configuration(struct usb_device *dev)
}
if (dev->quirks & USB_QUIRK_DELAY_INIT)
msleep(100);
msleep(200);
result = usb_get_descriptor(dev, USB_DT_CONFIG, cfgno,
bigbuffer, length);

2
drivers/usb/core/hub.c
View File

@@ -4828,7 +4828,7 @@ static void hub_port_connect(struct usb_hub *hub, int port1, u16 portstatus,
goto loop;
if (udev->quirks & USB_QUIRK_DELAY_INIT)
msleep(1000);
msleep(2000);
/* consecutive bus-powered hubs aren't reliable; they can
* violate the voltage drop budget. if the new child has