cxl/pci: Check Mem_info_valid bit for each applicable DVSEC

In theory a device might set the mem_info_valid bit for a first range
after it is ready but before as second range has reached that state.
Therefore, the correct approach is to check the Mem_info_valid bit for
each applicable DVSEC range against HDM_COUNT, rather than only for the
DVSEC range 1. Consequently, let's move the check into the "for loop"
that handles each DVSEC range.

Reviewed-by: Jonathan Cameron <[email protected]>
Signed-off-by: Yanfei Xu <[email protected]>
Reviewed-by: Alison Schofield <[email protected]>
Link: https://patch.msgid.link/[email protected]
Signed-off-by: Dave Jiang <[email protected]>

Author: YanfeiXu

drivers/cxl/core/pci.c

@@ -324,10 +324,6 @@ int cxl_dvsec_rr_decode(struct device *dev, struct cxl_port *port,
 	if (!hdm_count || hdm_count > 2)
 		return -EINVAL;
 
-	rc = cxl_dvsec_mem_range_valid(cxlds, 0);
-	if (rc)
-		return rc;
-
 	/*
 	 * The current DVSEC values are moot if the memory capability is
 	 * disabled, and they will remain moot after the HDM Decoder
@@ -345,6 +341,10 @@ int cxl_dvsec_rr_decode(struct device *dev, struct cxl_port *port,
 		u64 base, size;
 		u32 temp;
 
+		rc = cxl_dvsec_mem_range_valid(cxlds, i);
+		if (rc)
+			return rc;
+
 		rc = pci_read_config_dword(
 			pdev, d + CXL_DVSEC_RANGE_SIZE_HIGH(i), &temp);
 		if (rc)