This is a note to let you know that I've just added the patch titled
cxl/region: Fix missing probe failure
to the 6.1-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-region-fix-missing-probe-failure.patch
and it can be found in the queue-6.1 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From bf3e5da8cb43a671b32fc125fa81b8f6a3677192 Mon Sep 17 00:00:00 2001
From: Dan Williams <dan.j.williams@xxxxxxxxx>
Date: Thu, 1 Dec 2022 14:03:24 -0800
Subject: cxl/region: Fix missing probe failure
From: Dan Williams <dan.j.williams@xxxxxxxxx>
commit bf3e5da8cb43a671b32fc125fa81b8f6a3677192 upstream.
cxl_region_probe() allows for regions not in the 'commit' state to be
enabled. Fail probe when the region is not committed otherwise the
kernel may indicate that an address range is active when none of the
decoders are active.
Fixes: 8d48817df6ac ("cxl/region: Add region driver boiler plate")
Cc: <stable@xxxxxxxxxxxxxxx>
Reviewed-by: Davidlohr Bueso <dave@xxxxxxxxxxxx>
Reviewed-by: Dave Jiang <dave.jiang@xxxxxxxxx>
Reviewed-by: Jonathan Cameron <Jonathan.Cameron@xxxxxxxxxx>
Link: https://lore.kernel.org/r/166993220462.1995348.1698008475198427361.stgit@xxxxxxxxxxxxxxxxxxxxxxxxx
Signed-off-by: Dan Williams <dan.j.williams@xxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/cxl/core/region.c | 3 +++
1 file changed, 3 insertions(+)
--- a/drivers/cxl/core/region.c
+++ b/drivers/cxl/core/region.c
@@ -1923,6 +1923,9 @@ static int cxl_region_probe(struct devic
*/
up_read(&cxl_region_rwsem);
+ if (rc)
+ return rc;
+
switch (cxlr->mode) {
case CXL_DECODER_PMEM:
return devm_cxl_add_pmem_region(cxlr);
Patches currently in stable-queue which might be from dan.j.williams@xxxxxxxxx are
queue-6.1/cxl-region-fix-memdev-reuse-check.patch
queue-6.1/cxl-region-fix-missing-probe-failure.patch
