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9d778f0c5f
linux/drivers/usb/core
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Kishon Vijay Abraham I a44623d927 usb: core: hcd: Add support for deferring roothub registration 
It has been observed with certain PCIe USB cards (like Inateck connected
to AM64 EVM or J7200 EVM) that as soon as the primary roothub is
registered, port status change is handled even before xHC is running
leading to cold plug USB devices not detected. For such cases, registering
both the root hubs along with the second HCD is required. Add support for
deferring roothub registration in usb_add_hcd(), so that both primary and
secondary roothubs are registered along with the second HCD.

This patch has been added and reverted earier as it triggered a race
in usb device enumeration.
That race is now fixed in 5.16-rc3, and in stable back to 5.4
commit 6cca13de26 ("usb: hub: Fix locking issues with address0_mutex")
commit 6ae6dc22d2 ("usb: hub: Fix usb enumeration issue due to address0
race")

CC: stable@vger.kernel.org # 5.4+
Suggested-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Tested-by: Chris Chiu <chris.chiu@canonical.com>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
Link: https://lore.kernel.org/r/20220510091630.16564-2-kishon@ti.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2022-05-12 13:59:59 +02:00
..
buffer.c usb: core: Replace in_interrupt() in comments 2020-10-28 12:32:59 +01:00
config.c usb: core: config: using bit mask instead of individual bits 2021-12-12 13:06:39 +01:00
devices.c usb: core: devices: drop redundant buffer overflow checks 2022-04-26 13:57:38 +02:00
devio.c usb: core: Don't hold the device lock while sleeping in do_proc_control() 2022-04-21 19:17:00 +02:00
driver.c USB: core: Disable remote wakeup for freeze/quiesce 2022-04-23 10:33:52 +02:00
endpoint.c usb: common: add function to get interval expressed in us unit 2021-03-10 09:37:17 +01:00
file.c USB: core: Fix races in character device registration and deregistraion 2019-08-12 22:47:24 +02:00
generic.c usb: core: Fix file path that does not exist 2021-12-05 14:24:19 +01:00
hcd-pci.c USB: hcd-pci: Fully suspend across freeze/thaw cycle 2022-04-23 10:33:53 +02:00
hcd.c usb: core: hcd: Add support for deferring roothub registration 2022-05-12 13:59:59 +02:00
hub.c usb: remove third argument of usb_maxpacket() 2022-04-23 10:33:53 +02:00
hub.h usb: core: reduce power-on-good delay time of root hub 2021-04-10 10:45:48 +02:00
Kconfig USB: hub: Add Kconfig option to reduce number of port initialization retries 2020-10-02 11:29:02 +02:00
ledtrig-usbport.c usb: core: ledtrig-usbport: Demote obvious misuse of kerneldoc to standard comment blocks 2020-07-09 16:46:57 +02:00
Makefile
message.c USB: core: Avoid WARNings for 0-length descriptor requests 2021-06-09 11:11:39 +02:00
notify.c
of.c drivers: usb: Fix trivial spelling 2020-06-18 10:13:16 +02:00
otg_productlist.h USB: OTG: rename product list of devices 2020-06-19 08:58:55 +02:00
phy.c usb: core: phy: add support for PHY calibration 2019-09-03 15:54:55 +02:00
phy.h usb: core: phy: add support for PHY calibration 2019-09-03 15:54:55 +02:00
port.c usb: core: Unregister device on component_add() failure 2022-02-11 10:57:21 +01:00
quirks.c USB: quirks: add STRING quirk for VCOM device 2022-04-14 18:03:45 +02:00
sysfs.c driver core: Move the "removable" attribute from USB to core 2021-05-27 09:36:31 +02:00
urb.c USB: core: Fix hang in usb_kill_urb by adding memory barriers 2022-01-25 18:43:19 +01:00
usb-acpi.c usb: core: acpi: Use the sysdev pointer instead of controller device 2022-05-05 21:57:31 +02:00
usb.c USB: core: Update kerneldoc for usb_get_dev() and usb_get_intf() 2022-02-25 16:53:41 +01:00
usb.h usbcore: Check both id_table and match() when both available 2020-10-28 13:24:58 +01:00