This is a note to let you know that I've just added the patch titled cxl: Allow release of contexts which have been OPENED but not STARTED to the 4.2-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: cxl-allow-release-of-contexts-which-have-been-opened-but-not-started.patch and it can be found in the queue-4.2 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. >From 7c26b9cf5347c24272152438cdd9675183804425 Mon Sep 17 00:00:00 2001 From: Andrew Donnellan <andrew.donnellan@xxxxxxxxxxx> Date: Wed, 19 Aug 2015 09:27:18 +1000 Subject: cxl: Allow release of contexts which have been OPENED but not STARTED From: Andrew Donnellan <andrew.donnellan@xxxxxxxxxxx> commit 7c26b9cf5347c24272152438cdd9675183804425 upstream. If we open a context but do not start it (either because we do not attempt to start it, or because it fails to start for some reason), we are left with a context in state OPENED. Previously, cxl_release_context() only allowed releasing contexts in state CLOSED, so attempting to release an OPENED context would fail. In particular, this bug causes available contexts to run out after some EEH failures, where drivers attempt to release contexts that have failed to start. Allow releasing contexts in any state with a value lower than STARTED, i.e. OPENED or CLOSED (we can't release a STARTED context as it's currently using the hardware, and we assume that contexts in any new states which may be added in future with a value higher than STARTED are also unsafe to release). Fixes: 6f7f0b3df6d4 ("cxl: Add AFU virtual PHB and kernel API") Signed-off-by: Andrew Donnellan <andrew.donnellan@xxxxxxxxxxx> Signed-off-by: Daniel Axtens <dja@xxxxxxxxxx> Acked-by: Ian Munsie <imunsie@xxxxxxxxxxx> Signed-off-by: Michael Ellerman <mpe@xxxxxxxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- drivers/misc/cxl/api.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/drivers/misc/cxl/api.c +++ b/drivers/misc/cxl/api.c @@ -59,7 +59,7 @@ EXPORT_SYMBOL_GPL(cxl_get_phys_dev); int cxl_release_context(struct cxl_context *ctx) { - if (ctx->status != CLOSED) + if (ctx->status >= STARTED) return -EBUSY; put_device(&ctx->afu->dev); Patches currently in stable-queue which might be from andrew.donnellan@xxxxxxxxxxx are queue-4.2/cxl-allow-release-of-contexts-which-have-been-opened-but-not-started.patch -- To unsubscribe from this list: send the line "unsubscribe stable" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html