[RFC PATCH 02/15] cxl/core/hdm: Bail on endpoint init fail

[Ben Widawsky <ben.widawsky@intel.com>]

Endpoint decoder enumeration is the only way in which we can determine
Device Physical Address (DPA) -> Host Physical Address (HPA) mappings.
Information is obtained only when the register state can be read
sequentially. If when enumerating the decoders a failure occurs, all
other decoders must also fail since the decoders can no longer be
accurately managed (unless it's the last decoder in which case it can
still work).

Signed-off-by: Ben Widawsky <ben.widawsky@intel.com>
---
 drivers/cxl/core/hdm.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/cxl/core/hdm.c b/drivers/cxl/core/hdm.c
index bfc8ee876278..c3c021b54079 100644
--- a/drivers/cxl/core/hdm.c
+++ b/drivers/cxl/core/hdm.c
@@ -255,6 +255,8 @@ int devm_cxl_enumerate_decoders(struct cxl_hdm *cxlhdm)
 				      cxlhdm->regs.hdm_decoder, i);
 		if (rc) {
 			put_device(&cxld->dev);
+			if (is_endpoint_decoder(&cxld->dev))
+				return rc;
 			failed++;
 			continue;
 		}
-- 
2.35.1