From: Kishon Vijay Abraham I <kishon@ti.com>
To: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Mathias Nyman <mathias.nyman@intel.com>,
Alan Stern <stern@rowland.harvard.edu>
Cc: <linux-usb@vger.kernel.org>, <linux-kernel@vger.kernel.org>,
<chris.chiu@canonical.com>,
Kishon Vijay Abraham I <kishon@ti.com>, <lokeshvutla@ti.com>
Subject: [PATCH v3 0/3] Fix cold plugged USB device on certain PCIe USB cards
Date: Wed, 8 Sep 2021 15:23:09 +0530 [thread overview]
Message-ID: <20210908095312.985-1-kishon@ti.com> (raw)
Cold plugged USB device was not detected on certain PCIe USB cards
(like Inateck card connected to AM64 EVM or connected to J7200 EVM).
Re-plugging the USB device always gets it enumerated.
This issue was discussed in
https://lore.kernel.org/r/772e4001-178e-4918-032c-6e625bdded24@ti.com
and
https://bugzilla.kernel.org/show_bug.cgi?id=214021
So the suggested solution is to register both root hubs along with the
second hcd for xhci.
RFC Patch series can be found at [1]
v1 Patch series can be found at [3]
v2 Patch series can be found at [4]
Changes from RFC:
1) Mathias identified potential issues with the RFC patch [2] and suggested
the solution to use HCD flags. This series implements it.
Changes from v1:
1) Fixed code comments pointed out by Alan Stern
2) Renamed the HCD flag variable to "HCD_FLAG_DEFER_RH_REGISTER" from
"HCD_FLAG_DEFER_PRI_RH_REGISTER"
Changes from v2:
1) Fixed issue in error path handling pointed by Alan
[1] -> https://lore.kernel.org/linux-usb/20210824105302.25382-1-kishon@ti.com/
[2] -> https://lore.kernel.org/linux-usb/06693934-28f2-d59e-b004-62cabd3f9e8e@linux.intel.com
[3] -> https://lore.kernel.org/r/20210825105132.10420-1-kishon@ti.com
[4] -> https://lore.kernel.org/r/20210826111426.751-1-kishon@ti.com
Kishon Vijay Abraham I (3):
usb: core: hcd: Add support for deferring roothub registration
xhci: Set HCD flag to defer primary roothub registration
usb: core: hcd: Modularize HCD stop configuration in usb_stop_hcd()
drivers/usb/core/hcd.c | 69 +++++++++++++++++++++++++++--------------
drivers/usb/host/xhci.c | 1 +
include/linux/usb/hcd.h | 2 ++
3 files changed, 49 insertions(+), 23 deletions(-)
--
2.17.1
next reply other threads:[~2021-09-08 9:53 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-09-08 9:53 Kishon Vijay Abraham I [this message]
2021-09-08 9:53 ` [PATCH v3 1/3] usb: core: hcd: Add support for deferring roothub registration Kishon Vijay Abraham I
2021-09-08 14:51 ` Alan Stern
2021-09-09 6:35 ` Kishon Vijay Abraham I
2021-09-08 15:46 ` kernel test robot
2021-09-08 15:46 ` kernel test robot
2021-09-08 9:53 ` [PATCH v3 2/3] xhci: Set HCD flag to defer primary " Kishon Vijay Abraham I
2021-09-08 9:53 ` [PATCH v3 3/3] usb: core: hcd: Modularize HCD stop configuration in usb_stop_hcd() Kishon Vijay Abraham I
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20210908095312.985-1-kishon@ti.com \
--to=kishon@ti.com \
--cc=chris.chiu@canonical.com \
--cc=gregkh@linuxfoundation.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-usb@vger.kernel.org \
--cc=lokeshvutla@ti.com \
--cc=mathias.nyman@intel.com \
--cc=stern@rowland.harvard.edu \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.