linux-kernel - [PATCH 5/7] cxl/mem: Move device register setup

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Date:   Wed,  7 Apr 2021 15:26:23 -0700
From:   Ben Widawsky <ben.widawsky@...el.com>
To:     linux-cxl@...r.kernel.org
Cc:     Ben Widawsky <ben.widawsky@...el.com>, linux-pci@...r.kernel.org,
        linux-acpi@...r.kernel.org, ira.weiny@...el.com,
        vishal.l.verma@...el.com, alison.schofield@...el.com,
        dan.j.williams@...el.com, linux-kernel@...r.kernel.org
Subject: [PATCH 5/7] cxl/mem: Move device register setup

Support expansion of register block types that the driver will attempt
to recognize by pulling the code up into the register block scanning
loop. Subsequent code can easily add in new register block types with
this.

Signed-off-by: Ben Widawsky <ben.widawsky@...el.com>
---
 drivers/cxl/mem.c | 19 +++++++++----------
 1 file changed, 9 insertions(+), 10 deletions(-)

diff --git a/drivers/cxl/mem.c b/drivers/cxl/mem.c
index 60b95c524c3e..49f651694cb0 100644
--- a/drivers/cxl/mem.c
+++ b/drivers/cxl/mem.c
@@ -1020,6 +1020,15 @@ static int cxl_mem_setup_regs(struct cxl_mem *cxlm)
 			base = cxl_mem_map_regblock(cxlm, reg_lo, reg_hi);
 			if (IS_ERR(base))
 				return PTR_ERR(base);
+
+			cxl_setup_device_regs(dev, base, &regs->device_regs);
+			if (!regs->status || !regs->mbox || !regs->memdev) {
+				dev_err(dev, "registers not found: %s%s%s\n",
+						!regs->status ? "status " : "",
+						!regs->mbox ? "mbox " : "",
+						!regs->memdev ? "memdev" : "");
+				return -ENXIO;
+			}
 			break;
 		}
 	}
@@ -1029,16 +1038,6 @@ static int cxl_mem_setup_regs(struct cxl_mem *cxlm)
 		return -ENXIO;
 	}
 
-	cxl_setup_device_regs(dev, base, &regs->device_regs);
-
-	if (!regs->status || !regs->mbox || !regs->memdev) {
-		dev_err(dev, "registers not found: %s%s%s\n",
-			!regs->status ? "status " : "",
-			!regs->mbox ? "mbox " : "",
-			!regs->memdev ? "memdev" : "");
-		return -ENXIO;
-	}
-
 	return 0;
 }
 
-- 
2.31.1