cxl: Align interleave decode/encode helpers with their callers

The interleave conversion helpers translate between encoded HDM
interleave values and the granularity and way values used by the
driver.

These helpers have been a recurring source of static analysis
complaints that expose type mismatches and potentially uninitialized
outputs. Fix those issues in the helpers so callers inherit the
consistent behavior automatically.

The decode and encode helpers have different interface issues.

The decode helpers return values through unsigned int pointers, but
the decoded values are ultimately represented as int throughout the
driver. Align the helper interfaces with their callers by changing
the out-parameters to int * and updating the handful of affected
locals to match.

The encode helpers leave their out-parameters unchanged on error. That
means callers that ignore the return value may observe uninitialized
encoded values. Initialize the outputs so failed conversions leave
defined values. This issue was originally reported by Purva and the
helper-side fix was suggested by Dan [1].

Tidy up a related, pre-existing, printk format specifier mismatch in
cxl_validate_translation_params().

No functional change for valid interleave parameters.

[1] https://lore.kernel.org/linux-cxl/20250419203530.45594-1-purvayeshi550@gmail.com/

Reported-by: Purva Yeshi <purvayeshi550@gmail.com>
Suggested-by: Dan Williams <djbw@kernel.org>
Signed-off-by: Alison Schofield <alison.schofield@intel.com>
Reviewed-by: Li Ming <ming.li@zohomail.com>
Reviewed-by: Dave Jiang <dave.jiang@intel.com>
Link: https://patch.msgid.link/20260605040801.865965-1-alison.schofield@intel.com
Signed-off-by: Dave Jiang <dave.jiang@intel.com>

0 files changed, 0 insertions, 0 deletions