From: Jonathan Richardson <jonathar-dY08KVG/lbpWk0Htik3J/w@public.gmane.org>
To: Dmitry Torokhov <dtor-hpIqsD4AKlfQT0dZR+AlfA@public.gmane.org>,
Anatol Pomazau <anatol-hpIqsD4AKlfQT0dZR+AlfA@public.gmane.org>,
Jonathan Richardson
<jonathar-dY08KVG/lbpWk0Htik3J/w@public.gmane.org>,
Scott Branden <sbranden-dY08KVG/lbpWk0Htik3J/w@public.gmane.org>,
Rob Herring <robh+dt-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>,
Pawel Moll <pawel.moll-5wv7dgnIgG8@public.gmane.org>,
Mark Rutland <mark.rutland-5wv7dgnIgG8@public.gmane.org>,
Ian Campbell
<ijc+devicetree-KcIKpvwj1kUDXYZnReoRVg@public.gmane.org>,
Kumar Gala <galak-sgV2jX0FEOL9JmXXK+q4OQ@public.gmane.org>,
Greg Kroah-Hartman
<gregkh-hQyY1W1yCW8ekmWlsbkhG0B+6BGkLq7r@public.gmane.org>,
Jiri Slaby <jslaby-AlSwsSmVLrQ@public.gmane.org>
Cc: devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
linux-serial-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
Subject: [PATCH 0/1] Synopsis 8250 serial port driver fix
Date: Wed, 25 Feb 2015 11:04:15 -0800 [thread overview]
Message-ID: <1424891056-1222-1-git-send-email-jonathar@broadcom.com> (raw)
In-Reply-To: <Jonathan Richardson <jonathar-dY08KVG/lbpWk0Htik3J/w@public.gmane.org>
Hi,
This patchset fixes a bug in the Synopsis 8250 serial driver which causes the
driver to hang. The bug occurs on simple 2 wire serial ports when modem control
signalling has been enabled. It can be reproduced from user space by enabling
modem control signals (stty -clocal), then opening a serial port and polling for
data available to read with a timeout. A properly implemented driver will
ignore the control signals and the call to poll will return. The current
version of the driver hangs forever on the call to poll despite the timeout.
Jon
Desmond Liu (1):
serial: 8250_dw: Fix get_mctrl behaviour
.../bindings/serial/snps-dw-apb-uart.txt | 7 ++++
drivers/tty/serial/8250/8250_dw.c | 41 ++++++++++++++++++++
2 files changed, 48 insertions(+)
--
1.7.9.5
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next parent reply other threads:[~2015-02-25 19:04 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <Jonathan Richardson <jonathar@broadcom.com>
[not found] ` <Jonathan Richardson <jonathar-dY08KVG/lbpWk0Htik3J/w@public.gmane.org>
2015-02-25 19:04 ` Jonathan Richardson [this message]
2015-02-25 19:04 ` [PATCH 1/1] serial: 8250_dw: Fix get_mctrl behaviour Jonathan Richardson
2015-02-25 19:21 ` Arnd Bergmann
2015-02-25 20:00 ` Jonathan Richardson
2015-02-25 20:07 ` Arnd Bergmann
2015-02-27 0:35 ` [PATCH v2 0/1] Synopsis 8250 serial port driver fix Jonathan Richardson
2015-02-27 0:35 ` [PATCH v2 1/1] serial: 8250_dw: Fix get_mctrl behaviour Jonathan Richardson
2015-03-09 18:40 ` Dmitry Torokhov
[not found] ` <CAE_wzQ-43+oGAmyJ_cgso1XfnCYFGVczPvePG++x=povcAPOdA-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2015-03-09 18:51 ` Jonathan Richardson
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