[GIT PULL] Compute Express Link (CXL) Fix for 6.9-rc7

* [GIT PULL] Compute Express Link (CXL) Fix for 6.9-rc7
@ 2024-05-03 16:21 Dave Jiang
  2024-05-03 23:26 ` pr-tracker-bot
  0 siblings, 1 reply; 2+ messages in thread
From: Dave Jiang @ 2024-05-03 16:21 UTC (permalink / raw)
  To: Linus Torvalds
  Cc: linux-cxl, linux-kernel, Dan Williams, Jonathan Cameron,
	Davidlohr Bueso, Ira Weiny, Alison Schofield, Vishal Verma

Hi Linus, please pull from

  git://git.kernel.org/pub/scm/linux/kernel/git/cxl/cxl.git tags/cxl-fixes-6.9-rc7

...to receive a fix for the CXL subsystem.

A late bug was reported by Robert Richter that the Restricted CXL Host
(RCH) support was missing in the CXL endpoint access_coordinate
calculation. The missing support causes the topology iterator to stumble over
a NULL pointer and triggers a kernel OOPS on a platform with CXL 1.1 support.
The fix bypasses RCH topology as the access_coordinate calculation is not
necessary since RCH does not support hotplug and the memory region exported
should be covered by the HMAT table already. A unit test is also added to
cxl_test to check against future regressions on the topology iterator.

This has build success notification from kbuild-robot. It has been in the -next
for several days with no reported issues.

---

The following changes since commit e67572cd2204894179d89bd7b984072f19313b03:

  Linux 6.9-rc6 (2024-04-28 13:47:24 -0700)

are available in the Git repository at:

  git://git.kernel.org/pub/scm/linux/kernel/git/cxl/cxl.git tags/cxl-fixes-6.9-rc7

for you to fetch changes up to 5d211c7090590033581175d6405ae40917ca3a06:

  cxl: Fix cxl_endpoint_get_perf_coordinate() support for RCH (2024-04-29 09:03:26 -0700)

----------------------------------------------------------------
cxl fix for v6.9-rc7

- Add missing RCH support for endpoint access_coordinate calculation

----------------------------------------------------------------
Dave Jiang (1):
      cxl: Fix cxl_endpoint_get_perf_coordinate() support for RCH

 drivers/cxl/core/port.c      | 15 ++++++++++++++-
 tools/testing/cxl/test/cxl.c |  7 +++++++
 2 files changed, 21 insertions(+), 1 deletion(-)

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