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cxl/region: Fix missing probe failure 

commit bf3e5da8cb 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: 8d48817df6 ("cxl/region: Add region driver boiler plate")
Cc: <stable@vger.kernel.org>
Reviewed-by: Davidlohr Bueso <dave@stgolabs.net>
Reviewed-by: Dave Jiang <dave.jiang@intel.com>
Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Link: https://lore.kernel.org/r/166993220462.1995348.1698008475198427361.stgit@dwillia2-xfh.jf.intel.com
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Dan Williams 2022-12-01 14:03:24 -08:00 committed by Greg Kroah-Hartman
parent 654ceea201
commit 7271915e0a
1 changed files with 3 additions and 0 deletions
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3
drivers/cxl/core/region.c
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@ -1922,6 +1922,9 @@ static int cxl_region_probe(struct device *dev)
*/
up_read(&cxl_region_rwsem);
if (rc)
return rc;
switch (cxlr->mode) {
case CXL_DECODER_PMEM:
return devm_cxl_add_pmem_region(cxlr);