cxl/acpi: Move rescan to the workqueue

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Now that the cxl_mem driver has a need to take the root device lock, the
cxl_bus_rescan() needs to run outside of the root lock context. That
need arises from RCH topologies and the locking that the cxl_mem driver
does to attach a descendant to an upstream port. In the RCH case the
lock needed is the CXL root device lock [1].

Link: http://lore.kernel.org/r/166993045621.1882361.1730100141527044744.stgit@dwillia2-xfh.jf.intel.com [1]
Tested-by: Robert Richter <rrichter@amd.com>
Link: http://lore.kernel.org/r/166993042884.1882361.5633723613683058881.stgit@dwillia2-xfh.jf.intel.com
Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>

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This commit is contained in:

Dan Williams 2022-12-01 13:33:48 -08:00

parent 03ff079aa6

commit 4029c32fb6

3 changed files with 34 additions and 5 deletions

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17

drivers/cxl/acpi.c

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19

drivers/cxl/core/port.c

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3

drivers/cxl/cxl.h

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