cxl/mbox: Improve handling of mbox_cmd hw return codes

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Upon a completed command the caller is still expected to check
the actual return_code register to ensure it succeed. This
adds, per the spec, the potential command return codes. It maps
the hardware return code with the kernel's errno style, and by
default continues to use -ENXIO (Command completed, but device
reported an error).

Signed-off-by: Davidlohr Bueso <dave@stgolabs.net>
Reviewed by: Adam Manzanares <a.manzanares@samsung.com>
Link: https://lore.kernel.org/r/20220404021216.66841-4-dave@stgolabs.net
Signed-off-by: Dan Williams <dan.j.williams@intel.com>

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Davidlohr Bueso 2022-04-03 19:12:15 -07:00 • committed by Dan Williams

parent cbe83a2052

commit 92fcc1abab

3 changed files with 54 additions and 3 deletions

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2

drivers/cxl/core/mbox.c

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53

drivers/cxl/cxlmem.h

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2

drivers/cxl/pci.c

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