Simon Gaiser 2a22ee6c3a xen: xenbus_dev_frontend: Fix XS_TRANSACTION_END handling ... Commit fd8aa9095a ("xen: optimize xenbus driver for multiple concurrent xenstore accesses") made a subtle change to the semantic of xenbus_dev_request_and_reply() and xenbus_transaction_end(). Before on an error response to XS_TRANSACTION_END xenbus_dev_request_and_reply() would not decrement the active transaction counter. But xenbus_transaction_end() has always counted the transaction as finished regardless of the response. The new behavior is that xenbus_dev_request_and_reply() and xenbus_transaction_end() will always count the transaction as finished regardless the response code (handled in xs_request_exit()). But xenbus_dev_frontend tries to end a transaction on closing of the device if the XS_TRANSACTION_END failed before. Trying to close the transaction twice corrupts the reference count. So fix this by also considering a transaction closed if we have sent XS_TRANSACTION_END once regardless of the return code. Cc: <stable@vger.kernel.org> # 4.11 Fixes: fd8aa9095a ("xen: optimize xenbus driver for multiple concurrent xenstore accesses") Signed-off-by: Simon Gaiser <simon@invisiblethingslab.com> Reviewed-by: Juergen Gross <jgross@suse.com> Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>		2018-03-21 08:28:48 -04:00
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Makefile	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
xenbus_client.c	xen: don't compile pv-specific parts if XEN_PV isn't configured	2017-09-18 09:13:23 -04:00
xenbus_comms.c	xenbus: track caller request id	2018-02-17 09:40:33 +01:00
xenbus_dev_backend.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
xenbus_dev_frontend.c	xen: xenbus_dev_frontend: Fix XS_TRANSACTION_END handling	2018-03-21 08:28:48 -04:00
xenbus_probe_backend.c	xen: modify xenstore watch event interface	2017-02-09 11:26:49 -05:00
xenbus_probe_frontend.c	xen: xenbus_probe_frontend: mark expected switch fall-throughs	2017-11-03 11:36:07 -04:00
xenbus_probe.c	xen: xenbus: use put_device() instead of kfree()	2018-03-08 15:30:30 +01:00
xenbus_xs.c	xenbus: track caller request id	2018-02-17 09:40:33 +01:00
xenbus.h	xenbus: track caller request id	2018-02-17 09:40:33 +01:00