From: Robert Jarzmik <robert.jarzmik@free.fr>
To: Linux mtd <linux-mtd@lists.infradead.org>
Subject: MTD API locking and concurrency
Date: Tue, 13 Mar 2012 06:45:24 +0100 [thread overview]
Message-ID: <87obs1rr4b.fsf@free.fr> (raw)
Hi,
I came across a concurrent usage of my MTD driver by UBIFS by doing
an IOC_UBI_UPVOL. As my chip doesn't support multiple requests at a time, I need
to protect the access to chip registers.
I wonder if mtd api function can be called in interrupt context. My wish would
be to use mutexes, but I have to be sure there is no interrupt path I have not
seen. The only thing I'm certain is that my MTD drivers doesn't handle
interrupts, so the interrupt won't come from him.
Is there a guarantee that mtd api functions are called with !in_interrupt() ?
Cheers.
--
Robert
next reply other threads:[~2012-03-13 5:45 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-03-13 5:45 Robert Jarzmik [this message]
2012-03-13 12:41 ` MTD API locking and concurrency Artem Bityutskiy
2012-03-13 17:17 ` Mike Dunn
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