linux/drivers/cxl/core
Alison Schofield e46f25f5a8 cxl/region: Test CXL_DECODER_F_NORMALIZED_ADDRESSING as a bitmask
The CXL decoder flags are defined as bitmasks, not bit indices.
Using test_bit() to check them interprets the mask value as a bit
index, which is the wrong test.

For CXL_DECODER_F_NORMALIZED_ADDRESSING the test reads beyond the
flags word, making the flag sometimes appear set and blocking creation
of CXL region debugfs attributes that support poison operations.

Replace test_bit() with a bitmask check.

Found with cxl-test.

Fixes: 208f432406 ("cxl: Disable HPA/SPA translation handlers for Normalized Addressing")
Signed-off-by: Alison Schofield <alison.schofield@intel.com>
Reviewed-by: Gregory Price <gourry@gourry.net>
Tested-by: Gregory Price <gourry@gourry.net>
Link: https://patch.msgid.link/63fe4a6203e40e404347f1cdc7a1c55cb4959b86.1771873256.git.alison.schofield@intel.com
Signed-off-by: Dave Jiang <dave.jiang@intel.com>
2026-02-24 08:33:30 -07:00
..
Makefile
atl.c
cdat.c
core.h
edac.c
features.c
hdm.c
mbox.c
mce.c
mce.h
memdev.c
pci.c
pmem.c
pmu.c
port.c
ras.c
ras_rch.c
region.c
regs.c
suspend.c
trace.c
trace.h