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From: Oliver Neukum <oneukum@suse.com>
To: guido@kiener-muenchen.de
Cc: dpenkler@gmail.com, steve_bayless@keysight.com,
	gregkh@linuxfoundation.org, pankaj.adhikari@ni.com,
	guido.kiener@rohde-schwarz.com, linux-usb@vger.kernel.org
Subject: [07/12] usb: usbtmc: Add ioctl USBTMC488_IOCTL_WAIT_SRQ
Date: Mon, 28 May 2018 14:36:06 +0200	[thread overview]
Message-ID: <1527510966.6190.6.camel@suse.com> (raw)

Am Montag, den 28.05.2018, 10:59 +0000 schrieb guido@kiener-
muenchen.de:
> > No, the problem is that you will underflow io->mutex
> > 
> 
> Don't worry. The function usbtmc488_ioctl_wait_srq is called by
> usbtmc_ioctl which already locks the mutex. See
> https://elixir.bootlin.com/linux/v4.17-rc7/source/drivers/usb/class/usbtmc.c#L1189
> So the mutex is just unlocked here to allow other threads to still communicate
> with the device.

Hi,

thanks I had overlooked that.

	Regards
		Oliver
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             reply	other threads:[~2018-05-28 12:36 UTC|newest]

Thread overview: 11+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-05-28 12:36 Oliver Neukum [this message]
  -- strict thread matches above, loose matches on Subject: below --
2018-05-28 10:59 [07/12] usb: usbtmc: Add ioctl USBTMC488_IOCTL_WAIT_SRQ Guido Kiener
2018-05-25 11:17 Oliver Neukum
2018-05-24 12:59 Guido Kiener
2018-05-23 16:33 Greg Kroah-Hartman
2018-05-23 12:08 Oliver Neukum
2018-05-18 15:17 Guido Kiener
2018-05-18 15:07 Greg Kroah-Hartman
2018-05-18 15:02 Guido Kiener
2018-05-18 13:38 Greg Kroah-Hartman
2018-05-17 17:03 Guido Kiener

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