Logan Gunthorpe d1d846fb02 PCI/switchtec: Fix init_completion race condition with poll_wait() ... [ Upstream commit efbdc76960 ] The call to init_completion() in mrpc_queue_cmd() can theoretically race with the call to poll_wait() in switchtec_dev_poll(). poll() write() switchtec_dev_poll() switchtec_dev_write() poll_wait(&s->comp.wait); mrpc_queue_cmd() init_completion(&s->comp) init_waitqueue_head(&s->comp.wait) To my knowledge, no one has hit this bug. Fix this by using reinit_completion() instead of init_completion() in mrpc_queue_cmd(). Fixes: 080b47def5 ("MicroSemi Switchtec management interface driver") Reported-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Signed-off-by: Logan Gunthorpe <logang@deltatee.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Acked-by: Bjorn Helgaas <bhelgaas@google.com> Link: https://lkml.kernel.org/r/20200313183608.2646-1-logang@deltatee.com Signed-off-by: Sasha Levin <sashal@kernel.org>		2020-04-17 10:50:02 +02:00
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Kconfig	docs: driver-api: add a series of orphaned documents	2019-07-15 11:03:02 -03:00
Makefile	PCI: Add SPDX GPL-2.0 when no license was specified	2018-01-26 11:45:16 -06:00
switchtec.c	PCI/switchtec: Fix init_completion race condition with poll_wait()	2020-04-17 10:50:02 +02:00