From: Sasha Levin <sashal@kernel.org>
To: linux-kernel@vger.kernel.org, stable@vger.kernel.org
Cc: EJ Hsu <ejh@nvidia.com>, Peter Chen <peter.chen@nxp.com>,
Felipe Balbi <balbi@kernel.org>, Sasha Levin <sashal@kernel.org>,
linux-usb@vger.kernel.org
Subject: [PATCH AUTOSEL 5.4 39/52] usb: gadget: fix wrong endpoint desc
Date: Fri, 20 Dec 2019 09:29:41 -0500 [thread overview]
Message-ID: <20191220142954.9500-39-sashal@kernel.org> (raw)
In-Reply-To: <20191220142954.9500-1-sashal@kernel.org>
From: EJ Hsu <ejh@nvidia.com>
[ Upstream commit e5b5da96da50ef30abb39cb9f694e99366404d24 ]
Gadget driver should always use config_ep_by_speed() to initialize
usb_ep struct according to usb device's operating speed. Otherwise,
usb_ep struct may be wrong if usb devcie's operating speed is changed.
The key point in this patch is that we want to make sure the desc pointer
in usb_ep struct will be set to NULL when gadget is disconnected.
This will force it to call config_ep_by_speed() to correctly initialize
usb_ep struct based on the new operating speed when gadget is
re-connected later.
Reviewed-by: Peter Chen <peter.chen@nxp.com>
Signed-off-by: EJ Hsu <ejh@nvidia.com>
Signed-off-by: Felipe Balbi <balbi@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/usb/gadget/function/f_ecm.c | 6 +++++-
drivers/usb/gadget/function/f_rndis.c | 1 +
2 files changed, 6 insertions(+), 1 deletion(-)
diff --git a/drivers/usb/gadget/function/f_ecm.c b/drivers/usb/gadget/function/f_ecm.c
index 6ce044008cf6c..460d5d7c984f5 100644
--- a/drivers/usb/gadget/function/f_ecm.c
+++ b/drivers/usb/gadget/function/f_ecm.c
@@ -621,8 +621,12 @@ static void ecm_disable(struct usb_function *f)
DBG(cdev, "ecm deactivated\n");
- if (ecm->port.in_ep->enabled)
+ if (ecm->port.in_ep->enabled) {
gether_disconnect(&ecm->port);
+ } else {
+ ecm->port.in_ep->desc = NULL;
+ ecm->port.out_ep->desc = NULL;
+ }
usb_ep_disable(ecm->notify);
ecm->notify->desc = NULL;
diff --git a/drivers/usb/gadget/function/f_rndis.c b/drivers/usb/gadget/function/f_rndis.c
index d48df36622b74..0d8e4a364ca6e 100644
--- a/drivers/usb/gadget/function/f_rndis.c
+++ b/drivers/usb/gadget/function/f_rndis.c
@@ -618,6 +618,7 @@ static void rndis_disable(struct usb_function *f)
gether_disconnect(&rndis->port);
usb_ep_disable(rndis->notify);
+ rndis->notify->desc = NULL;
}
/*-------------------------------------------------------------------------*/
--
2.20.1
parent reply other threads:[~2019-12-20 14:32 UTC|newest]
Thread overview: expand[flat|nested] mbox.gz Atom feed
[parent not found: <20191220142954.9500-1-sashal@kernel.org>]
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=20191220142954.9500-39-sashal@kernel.org \
--to=sashal@kernel.org \
--cc=balbi@kernel.org \
--cc=ejh@nvidia.com \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-usb@vger.kernel.org \
--cc=peter.chen@nxp.com \
--cc=stable@vger.kernel.org \
/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 a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).