leandrof/linux
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

r8152: search the configuration of vendor mode

Browse Source 
The vendor mode is not always at config #1, so it is necessary to
set the correct configuration number.

Signed-off-by: Hayes Wang <hayeswang@realtek.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Hayes Wang 2021-04-16 16:04:37 +08:00 committed by David S. Miller
parent 4a51b0e8a0
commit c2198943e3
1 changed files with 35 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

39
drivers/net/usb/r8152.c
View File

@ -29,7 +29,7 @@
#include <linux/usb/r8152.h>
/* Information for net-next */
#define NETNEXT_VERSION "11"
#define NETNEXT_VERSION "12"
/* Information for net */
#define NET_VERSION "11"
@ -8107,6 +8107,39 @@ static void r8156b_init(struct r8152 *tp)
tp->coalesce = 15000; /* 15 us */
}
static bool rtl_vendor_mode(struct usb_interface *intf)
{
struct usb_host_interface *alt = intf->cur_altsetting;
struct usb_device *udev;
struct usb_host_config *c;
int i, num_configs;
if (alt->desc.bInterfaceClass == USB_CLASS_VENDOR_SPEC)
return true;
/* The vendor mode is not always config #1, so to find it out. */
udev = interface_to_usbdev(intf);
c = udev->config;
num_configs = udev->descriptor.bNumConfigurations;
for (i = 0; i < num_configs; (i++, c++)) {
struct usb_interface_descriptor *desc = NULL;
if (c->desc.bNumInterfaces > 0)
desc = &c->intf_cache[0]->altsetting->desc;
else
continue;
if (desc->bInterfaceClass == USB_CLASS_VENDOR_SPEC) {
usb_driver_set_configuration(udev, c->desc.bConfigurationValue);
break;
}
}
WARN_ON_ONCE(i == num_configs);
return false;
}
static int rtl8152_pre_reset(struct usb_interface *intf)
{
struct r8152 *tp = usb_get_intfdata(intf);
@ -9345,10 +9378,8 @@ static int rtl8152_probe(struct usb_interface *intf,
if (version == RTL_VER_UNKNOWN)
return -ENODEV;
if (udev->actconfig->desc.bConfigurationValue != 1) {
usb_driver_set_configuration(udev, 1);
if (!rtl_vendor_mode(intf))
return -ENODEV;
}
if (intf->cur_altsetting->desc.bNumEndpoints < 3)
return -ENODEV;