David Vrabel 581d21a2d0 xenbus: fix deadlock on writes to /proc/xen/xenbus ... /proc/xen/xenbus does not work correctly. A read blocked waiting for a xenstore message holds the mutex needed for atomic file position updates. This blocks any writes on the same file handle, which can deadlock if the write is needed to unblock the read. Clear FMODE_ATOMIC_POS when opening this device to always get character device like sematics. Signed-off-by: David Vrabel <david.vrabel@citrix.com> Reviewed-by: Juergen Gross <jgross@suse.com> Signed-off-by: Juergen Gross <jgross@suse.com>		2016-12-12 15:22:13 +01:00
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Makefile	xen: Add xenbus_backend device	2011-12-16 13:29:41 -05:00
xenbus_client.c	xenbus: Support multiple grants ring with 64KB	2015-10-23 14:20:47 +01:00
xenbus_comms.c	xenbus: use virt_xxx barriers	2016-01-12 20:47:03 +02:00
xenbus_comms.h	xenbus: save xenstore local status for later use	2013-05-29 09:04:20 -04:00
xenbus_dev_backend.c	drivers/xen: make xenbus_dev_[front/back]end explicitly non-modular	2016-03-21 15:13:55 +00:00
xenbus_dev_frontend.c	xenbus: fix deadlock on writes to /proc/xen/xenbus	2016-12-12 15:22:13 +01:00
xenbus_probe_backend.c	xen: make use of xenbus_read_unsigned() in xenbus	2016-11-07 13:55:36 +01:00
xenbus_probe_frontend.c	xenbus: check return value of xenbus_scanf()	2016-10-24 16:08:21 +01:00
xenbus_probe.c	xen: xenbus: set error code on failure	2016-12-08 07:53:57 +01:00
xenbus_probe.h	xen: remove DEFINE_XENBUS_DRIVER() macro	2014-10-06 10:27:57 +01:00
xenbus_xs.c	xen: make use of xenbus_read_unsigned() in xenbus	2016-11-07 13:55:36 +01:00