cxl/core/regs: Rework cxl_map_pmu_regs() to use map->dev for devm

struct cxl_register_map carries a @dev parameter for devm operations.
Simplify the function interface to use that instead of a separate @dev
argument.

Signed-off-by: Terry Bowman <terry.bowman@amd.com>
Signed-off-by: Robert Richter <rrichter@amd.com>
Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Link: https://lore.kernel.org/r/20231018171713.1883517-21-rrichter@amd.com
Signed-off-by: Dan Williams <dan.j.williams@intel.com>

Author: Robert Richter

drivers/cxl/core/regs.c

@@ -386,10 +386,9 @@ int cxl_count_regblock(struct pci_dev *pdev, enum cxl_regloc_type type)
 }
 EXPORT_SYMBOL_NS_GPL(cxl_count_regblock, CXL);
 
-int cxl_map_pmu_regs(struct pci_dev *pdev, struct cxl_pmu_regs *regs,
-		     struct cxl_register_map *map)
+int cxl_map_pmu_regs(struct cxl_register_map *map, struct cxl_pmu_regs *regs)
 {
-	struct device *dev = &pdev->dev;
+	struct device *dev = map->host;
 	resource_size_t phys_addr;
 
 	phys_addr = map->resource;

drivers/cxl/cxl.h

@@ -286,8 +286,7 @@ int cxl_map_component_regs(const struct cxl_register_map *map,
 			   unsigned long map_mask);
 int cxl_map_device_regs(const struct cxl_register_map *map,
 			struct cxl_device_regs *regs);
-int cxl_map_pmu_regs(struct pci_dev *pdev, struct cxl_pmu_regs *regs,
-		     struct cxl_register_map *map);
+int cxl_map_pmu_regs(struct cxl_register_map *map, struct cxl_pmu_regs *regs);
 
 enum cxl_regloc_type;
 int cxl_count_regblock(struct pci_dev *pdev, enum cxl_regloc_type type);

drivers/cxl/pci.c

@@ -898,7 +898,7 @@ static int cxl_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id)
 			break;
 		}
 
-		rc = cxl_map_pmu_regs(pdev, &pmu_regs, &map);
+		rc = cxl_map_pmu_regs(&map, &pmu_regs);
 		if (rc) {
 			dev_dbg(&pdev->dev, "Could not map PMU regs\n");
 			break;