From: Salah Triki <salah.triki@gmail.com>
To: Keith Packard <keithp@keithp.com>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: [PATCH] usb: misc: chaoskey: get lock before calling usb_[disable|enable]_autosuspend()
Date: Mon, 2 Aug 2021 23:22:05 +0100 [thread overview]
Message-ID: <20210802222205.GA1389315@pc> (raw)
Based on the documentation of usb_[disable|enable]_autosuspend(), the
caller must hold udev's device lock.
Signed-off-by: Salah Triki <salah.triki@gmail.com>
---
drivers/usb/misc/chaoskey.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/drivers/usb/misc/chaoskey.c b/drivers/usb/misc/chaoskey.c
index 87067c3d6109..8af00be7b9e8 100644
--- a/drivers/usb/misc/chaoskey.c
+++ b/drivers/usb/misc/chaoskey.c
@@ -206,7 +206,9 @@ static int chaoskey_probe(struct usb_interface *interface,
if (!dev->hwrng_registered)
usb_err(interface, "Unable to register with hwrng");
+ usb_lock_device(udev);
usb_enable_autosuspend(udev);
+ usb_unlock_device(udev);
usb_dbg(interface, "chaoskey probe success, size %d", dev->size);
return 0;
--
2.25.1
next reply other threads:[~2021-08-02 22:22 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-08-02 22:22 Salah Triki [this message]
2021-08-03 0:58 ` [PATCH] usb: misc: chaoskey: get lock before calling usb_[disable|enable]_autosuspend() Alan Stern
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