evie/android_kernel_oneplus_msm8998
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USB: configfs: Don't send DISCONNECT uevent during unbind

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Windows XP host takes upto 6 seconds to enumerate RNDIS composition when
RNDIS (tethering) is enabled while in MTP/PTP composition. This results in
Userpsace Tethering enable timeout (1 second) causing RNDIS enumeration
failure and falls back to default composition. Workaround the issue by not
sending disconnect event to userspace on composition switch (MTP/PTP to
RNDIS). Send the disconnect event from USB bus reset so that userspace
enable timer starts from bus reset.

Change-Id: I2d1fcaa0704e369204fbba4eceb8ba9b1c525b41
Signed-off-by: Vijayavardhan Vennapusa <vvreddy@codeaurora.org>
This commit is contained in:
Vijayavardhan Vennapusa 2017-10-30 14:33:51 +05:30 • committed by Gerrit - the friendly Code Review server
parent aedf62a2ba
commit 43c0d001bc
1 changed files with 5 additions and 1 deletions
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6
drivers/usb/gadget/configfs.c
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@ -87,6 +87,7 @@ struct gadget_info {
struct usb_composite_driver composite;
struct usb_composite_dev cdev;
bool use_os_desc;
bool unbinding;
char b_vendor_code;
char qw_sign[OS_STRING_QW_SIGN_LEN];
#ifdef CONFIG_USB_CONFIGFS_UEVENT
@ -283,9 +284,11 @@ static int unregister_gadget(struct gadget_info *gi)
if (!gi->udc_name)
return -ENODEV;
gi->unbinding = true;
ret = usb_gadget_unregister_driver(&gi->composite.gadget_driver);
if (ret)
return ret;
gi->unbinding = false;
kfree(gi->udc_name);
gi->udc_name = NULL;
return 0;
@ -1561,7 +1564,8 @@ static void android_disconnect(struct usb_gadget *gadget)
acc_disconnect();
#endif
gi->connected = 0;
schedule_work(&gi->work);
if (!gi->unbinding)
schedule_work(&gi->work);
composite_disconnect(gadget);
}
#endif