lists.openwall.net   lists  /  announce  owl-users  owl-dev  john-users  john-dev  passwdqc-users  yescrypt  popa3d-users  /  oss-security  kernel-hardening  musl  sabotage  tlsify  passwords  /  crypt-dev  xvendor  /  Bugtraq  Full-Disclosure  linux-kernel  linux-netdev  linux-ext4  linux-hardening  linux-cve-announce  PHC 
Open Source and information security mailing list archives
 
Hash Suite: Windows password security audit tool. GUI, reports in PDF.
[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Message-ID: <532B26C1.8080806@hurleysoftware.com>
Date:	Thu, 20 Mar 2014 13:34:57 -0400
From:	Peter Hurley <peter@...leysoftware.com>
To:	balbi@...com
CC:	Alan Cox <alan@...ux.intel.com>,
	Marcel Holtmann <marcel@...tmann.org>,
	Greg KH <gregkh@...uxfoundation.org>,
	Muralidharan Karicheri <m-karicheri2@...com>,
	linux-bluetooth@...r.kernel.org, linux-serial@...r.kernel.org,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Huang Shijie <b32955@...escale.com>
Subject: Re: hci_ldsic nested locking problem

[ +cc Huang Shijie ]

On 03/20/2014 01:29 PM, Felipe Balbi wrote:
> then we need updates to Documentation:
>
> Documentation/serial/tty.txt::
>
> |  Driver Side Interfaces:
> |
> |  receive_buf()	-	Hand buffers of bytes from the driver to the ldisc
> |  			for processing. Semantics currently rather
> |  			mysterious 8(
> |
> |  write_wakeup()	-	May be called at any point between open and close.
> |  			The TTY_DO_WRITE_WAKEUP flag indicates if a call
> |  			is needed but always races versus calls. Thus the
> |  			ldisc must be careful about setting order and to
> |  			handle unexpected calls. Must not sleep.
> |
> |  			The driver is forbidden from calling this directly
> |  			from the ->write call from the ldisc as the ldisc
> |  			is permitted to call the driver write method from
> |  			this function. In such a situation defer it.
>
> documentation says ldisc is allowed to call ->write() from
> ->write_wakeup(). huh ?

Patch submitted but never applied.

http://www.spinics.net/lists/linux-serial/msg11144.html

Regards,
Peter Hurley
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/

Powered by blists - more mailing lists

Powered by Openwall GNU/*/Linux Powered by OpenVZ