cxl/hdm: Add debug message for invalid interleave granularity

There's no debug message for invalid interleave granularity.  This
makes it hard to debug related bugs.  So, this is added in this patch.

Signed-off-by: Huang, Ying <ying.huang@intel.com>
Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Link: https://lore.kernel.org/r/20240402061016.388408-1-ying.huang@intel.com
Signed-off-by: Dave Jiang <dave.jiang@intel.com>

diff --git a/drivers/cxl/core/hdm.c b/drivers/cxl/core/hdm.c
index 7d97790b893d709b74fef1d66c05a6ca4150401f..973a27543ed59c3ebd145f780f863dd84e4b93e1 100644 (file)
--- a/drivers/cxl/core/hdm.c
+++ b/drivers/cxl/core/hdm.c
@@ -888,8 +888,12 @@ static int init_hdm_decoder(struct cxl_port *port, struct cxl_decoder *cxld,
        }
        rc = eig_to_granularity(FIELD_GET(CXL_HDM_DECODER0_CTRL_IG_MASK, ctrl),
                                 &cxld->interleave_granularity);
-       if (rc)
+       if (rc) {
+               dev_warn(&port->dev,
+                        "decoder%d.%d: Invalid interleave granularity (ctrl: %#x)\n",
+                        port->id, cxld->id, ctrl);
                return rc;
+       }
 
        dev_dbg(&port->dev, "decoder%d.%d: range: %#llx-%#llx iw: %d ig: %d\n",
                port->id, cxld->id, cxld->hpa_range.start, cxld->hpa_range.end,