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From: Marcel Holtmann <marcel@holtmann.org>
To: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Cc: linux-bluetooth@vger.kernel.org, linux-usb@vger.kernel.org,
	Thomas Gleixner <tglx@linutronix.de>,
	Johan Hedberg <johan.hedberg@gmail.com>
Subject: Re: [PATCH] Bluetooth: btusb: use irqsave() in URB's complete callback
Date: Fri, 6 Jul 2018 12:46:22 +0200	[thread overview]
Message-ID: <7C7F6423-3DFE-47F7-9A68-31817C1A3DC5@holtmann.org> (raw)
In-Reply-To: <20180619215657.13745-1-bigeasy@linutronix.de>

Hi Sebastian,

> The USB completion callback does not disable interrupts while acquiring
> the ->lock. We want to remove the local_irq_disable() invocation from
> __usb_hcd_giveback_urb() and therefore it is required for the callback
> handler to disable the interrupts while acquiring the lock.
> The callback may be invoked either in IRQ or BH context depending on the
> USB host controller.
> Use the _irqsave variant of the locking primitives.
> 
> Cc: Marcel Holtmann <marcel@holtmann.org>
> Cc: Johan Hedberg <johan.hedberg@gmail.com>
> Cc: linux-bluetooth@vger.kernel.org
> Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
> ---
> drivers/bluetooth/btusb.c | 20 ++++++++++++--------
> 1 file changed, 12 insertions(+), 8 deletions(-)

patch has been applied to bluetooth-next tree.

Regards

Marcel


WARNING: multiple messages have this Message-ID (diff)
From: Marcel Holtmann <marcel@holtmann.org>
To: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Cc: linux-bluetooth@vger.kernel.org, linux-usb@vger.kernel.org,
	Thomas Gleixner <tglx@linutronix.de>,
	Johan Hedberg <johan.hedberg@gmail.com>
Subject: Bluetooth: btusb: use irqsave() in URB's complete callback
Date: Fri, 6 Jul 2018 12:46:22 +0200	[thread overview]
Message-ID: <7C7F6423-3DFE-47F7-9A68-31817C1A3DC5@holtmann.org> (raw)

Hi Sebastian,

> The USB completion callback does not disable interrupts while acquiring
> the ->lock. We want to remove the local_irq_disable() invocation from
> __usb_hcd_giveback_urb() and therefore it is required for the callback
> handler to disable the interrupts while acquiring the lock.
> The callback may be invoked either in IRQ or BH context depending on the
> USB host controller.
> Use the _irqsave variant of the locking primitives.
> 
> Cc: Marcel Holtmann <marcel@holtmann.org>
> Cc: Johan Hedberg <johan.hedberg@gmail.com>
> Cc: linux-bluetooth@vger.kernel.org
> Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
> ---
> drivers/bluetooth/btusb.c | 20 ++++++++++++--------
> 1 file changed, 12 insertions(+), 8 deletions(-)

patch has been applied to bluetooth-next tree.

Regards

Marcel
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  parent reply	other threads:[~2018-07-06 10:46 UTC|newest]

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-06-19 21:56 [PATCH] Bluetooth: btusb: use irqsave() in URB's complete callback Sebastian Andrzej Siewior
2018-06-19 21:56 ` Sebastian Andrzej Siewior
2018-06-21 12:43 ` [PATCH] " Marcel Holtmann
2018-06-21 12:43   ` Marcel Holtmann
2018-06-21 12:52   ` [PATCH] " Sebastian Andrzej Siewior
2018-06-21 12:52     ` Sebastian Andrzej Siewior
2018-06-21 15:34     ` [PATCH] " Alan Stern
2018-06-21 15:34       ` Alan Stern
2018-07-01 15:19       ` [PATCH] " Sebastian Andrzej Siewior
2018-07-01 15:19         ` Sebastian Andrzej Siewior
2018-07-06 10:46 ` Marcel Holtmann [this message]
2018-07-06 10:46   ` Marcel Holtmann

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