|
 |
69f3e1 |
From 78a7dce49a0e3747e5aab9791434cb71297baf42 Mon Sep 17 00:00:00 2001
|
|
|
69f3e1 |
From: Gerd Hoffmann <kraxel@redhat.com>
|
|
|
69f3e1 |
Date: Tue, 4 Jun 2019 05:12:46 +0100
|
|
|
69f3e1 |
Subject: [PATCH 4/5] usb-host: avoid libusb_set_configuration calls
|
|
|
69f3e1 |
MIME-Version: 1.0
|
|
|
69f3e1 |
Content-Type: text/plain; charset=UTF-8
|
|
|
69f3e1 |
Content-Transfer-Encoding: 8bit
|
|
|
69f3e1 |
|
|
|
69f3e1 |
RH-Author: Gerd Hoffmann <kraxel@redhat.com>
|
|
|
69f3e1 |
Message-id: <20190604051246.11374-5-kraxel@redhat.com>
|
|
|
69f3e1 |
Patchwork-id: 88472
|
|
|
69f3e1 |
O-Subject: [RHEL-8.1.0 qemu-kvm PATCH 4/4] usb-host: avoid libusb_set_configuration calls
|
|
|
69f3e1 |
Bugzilla: 1719228
|
|
|
69f3e1 |
RH-Acked-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
|
|
|
69f3e1 |
RH-Acked-by: Philippe Mathieu-Daudé <philmd@redhat.com>
|
|
|
69f3e1 |
RH-Acked-by: Max Reitz <mreitz@redhat.com>
|
|
|
69f3e1 |
|
|
|
69f3e1 |
Seems some devices become confused when we call
|
|
|
69f3e1 |
libusb_set_configuration(). So before calling the function check
|
|
|
69f3e1 |
whenever the device has multiple configurations in the first place, and
|
|
|
69f3e1 |
in case it hasn't (which is the case for the majority of devices) simply
|
|
|
69f3e1 |
skip the call as it will have no effect anyway.
|
|
|
69f3e1 |
|
|
|
69f3e1 |
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
|
|
|
69f3e1 |
Message-id: 20190522094702.17619-4-kraxel@redhat.com
|
|
|
69f3e1 |
(cherry picked from commit bfe44898848614cfcb3a269bc965afbe1f0f331c)
|
|
|
69f3e1 |
Signed-off-by: Danilo C. L. de Paula <ddepaula@redhat.com>
|
|
|
69f3e1 |
---
|
|
|
69f3e1 |
hw/usb/host-libusb.c | 18 ++++++++++--------
|
|
|
69f3e1 |
1 file changed, 10 insertions(+), 8 deletions(-)
|
|
|
69f3e1 |
|
|
|
69f3e1 |
diff --git a/hw/usb/host-libusb.c b/hw/usb/host-libusb.c
|
|
|
69f3e1 |
index dd3ed02..587ff70 100644
|
|
|
69f3e1 |
--- a/hw/usb/host-libusb.c
|
|
|
69f3e1 |
+++ b/hw/usb/host-libusb.c
|
|
|
69f3e1 |
@@ -1220,19 +1220,21 @@ static void usb_host_set_address(USBHostDevice *s, int addr)
|
|
|
69f3e1 |
|
|
|
69f3e1 |
static void usb_host_set_config(USBHostDevice *s, int config, USBPacket *p)
|
|
|
69f3e1 |
{
|
|
|
69f3e1 |
- int rc;
|
|
|
69f3e1 |
+ int rc = 0;
|
|
|
69f3e1 |
|
|
|
69f3e1 |
trace_usb_host_set_config(s->bus_num, s->addr, config);
|
|
|
69f3e1 |
|
|
|
69f3e1 |
usb_host_release_interfaces(s);
|
|
|
69f3e1 |
- rc = libusb_set_configuration(s->dh, config);
|
|
|
69f3e1 |
- if (rc != 0) {
|
|
|
69f3e1 |
- usb_host_libusb_error("libusb_set_configuration", rc);
|
|
|
69f3e1 |
- p->status = USB_RET_STALL;
|
|
|
69f3e1 |
- if (rc == LIBUSB_ERROR_NO_DEVICE) {
|
|
|
69f3e1 |
- usb_host_nodev(s);
|
|
|
69f3e1 |
+ if (s->ddesc.bNumConfigurations != 1) {
|
|
|
69f3e1 |
+ rc = libusb_set_configuration(s->dh, config);
|
|
|
69f3e1 |
+ if (rc != 0) {
|
|
|
69f3e1 |
+ usb_host_libusb_error("libusb_set_configuration", rc);
|
|
|
69f3e1 |
+ p->status = USB_RET_STALL;
|
|
|
69f3e1 |
+ if (rc == LIBUSB_ERROR_NO_DEVICE) {
|
|
|
69f3e1 |
+ usb_host_nodev(s);
|
|
|
69f3e1 |
+ }
|
|
|
69f3e1 |
+ return;
|
|
|
69f3e1 |
}
|
|
|
69f3e1 |
- return;
|
|
|
69f3e1 |
}
|
|
|
69f3e1 |
p->status = usb_host_claim_interfaces(s, config);
|
|
|
69f3e1 |
if (p->status != USB_RET_SUCCESS) {
|
|
|
69f3e1 |
--
|
|
|
69f3e1 |
1.8.3.1
|
|
|
69f3e1 |
|