From: Robert Richter rrichter@amd.com
stable inclusion from stable-v6.6.2 commit 0fc37ec1b57ef7201228bd06b19af982f22dfa54 category: bugfix bugzilla: https://gitee.com/openeuler/kernel/issues/I8IW7G
Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=...
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[ Upstream commit dd22581f89537163f065e8ef7c125ce0fddf62cc ]
The primary role of @dev is to host the mappings for devm operations. @dev is too ambiguous as a name. I.e. when does @dev refer to the 'struct device *' instance that the registers belong, and when does @dev refer to the 'struct device *' instance hosting the mapping for devm operations?
Clarify the role of @dev in cxl_register_map by renaming it to @host. Also, rename local variables to 'host' where map->host is used.
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/20231018171713.1883517-3-rrichter@amd.com Signed-off-by: Dan Williams dan.j.williams@intel.com Stable-dep-of: 33d9c987bf8f ("cxl/port: Fix @host confusion in cxl_dport_setup_regs()") Signed-off-by: Sasha Levin sashal@kernel.org Signed-off-by: Zheng Zengkai zhengzengkai@huawei.com --- drivers/cxl/core/hdm.c | 2 +- drivers/cxl/core/port.c | 4 ++-- drivers/cxl/core/regs.c | 28 ++++++++++++++-------------- drivers/cxl/cxl.h | 4 ++-- drivers/cxl/pci.c | 2 +- 5 files changed, 20 insertions(+), 20 deletions(-)
diff --git a/drivers/cxl/core/hdm.c b/drivers/cxl/core/hdm.c index 506c9e14cdf9..3ad0d39d3d3f 100644 --- a/drivers/cxl/core/hdm.c +++ b/drivers/cxl/core/hdm.c @@ -85,7 +85,7 @@ static int map_hdm_decoder_regs(struct cxl_port *port, void __iomem *crb, struct cxl_component_regs *regs) { struct cxl_register_map map = { - .dev = &port->dev, + .host = &port->dev, .resource = port->component_reg_phys, .base = crb, .max_size = CXL_COMPONENT_REG_BLOCK_SIZE, diff --git a/drivers/cxl/core/port.c b/drivers/cxl/core/port.c index 5ba606c6e03f..c24cfe227194 100644 --- a/drivers/cxl/core/port.c +++ b/drivers/cxl/core/port.c @@ -697,14 +697,14 @@ static struct cxl_port *cxl_port_alloc(struct device *uport_dev, return ERR_PTR(rc); }
-static int cxl_setup_comp_regs(struct device *dev, struct cxl_register_map *map, +static int cxl_setup_comp_regs(struct device *host, struct cxl_register_map *map, resource_size_t component_reg_phys) { if (component_reg_phys == CXL_RESOURCE_NONE) return 0;
*map = (struct cxl_register_map) { - .dev = dev, + .host = host, .reg_type = CXL_REGLOC_RBI_COMPONENT, .resource = component_reg_phys, .max_size = CXL_COMPONENT_REG_BLOCK_SIZE, diff --git a/drivers/cxl/core/regs.c b/drivers/cxl/core/regs.c index 6281127b3e9d..e0fbe964f6f0 100644 --- a/drivers/cxl/core/regs.c +++ b/drivers/cxl/core/regs.c @@ -204,7 +204,7 @@ int cxl_map_component_regs(const struct cxl_register_map *map, struct cxl_component_regs *regs, unsigned long map_mask) { - struct device *dev = map->dev; + struct device *host = map->host; struct mapinfo { const struct cxl_reg_map *rmap; void __iomem **addr; @@ -225,7 +225,7 @@ int cxl_map_component_regs(const struct cxl_register_map *map, continue; phys_addr = map->resource + mi->rmap->offset; length = mi->rmap->size; - *(mi->addr) = devm_cxl_iomap_block(dev, phys_addr, length); + *(mi->addr) = devm_cxl_iomap_block(host, phys_addr, length); if (!*(mi->addr)) return -ENOMEM; } @@ -237,7 +237,7 @@ EXPORT_SYMBOL_NS_GPL(cxl_map_component_regs, CXL); int cxl_map_device_regs(const struct cxl_register_map *map, struct cxl_device_regs *regs) { - struct device *dev = map->dev; + struct device *host = map->host; resource_size_t phys_addr = map->resource; struct mapinfo { const struct cxl_reg_map *rmap; @@ -259,7 +259,7 @@ int cxl_map_device_regs(const struct cxl_register_map *map,
addr = phys_addr + mi->rmap->offset; length = mi->rmap->size; - *(mi->addr) = devm_cxl_iomap_block(dev, addr, length); + *(mi->addr) = devm_cxl_iomap_block(host, addr, length); if (!*(mi->addr)) return -ENOMEM; } @@ -309,7 +309,7 @@ int cxl_find_regblock_instance(struct pci_dev *pdev, enum cxl_regloc_type type, int regloc, i;
*map = (struct cxl_register_map) { - .dev = &pdev->dev, + .host = &pdev->dev, .resource = CXL_RESOURCE_NONE, };
@@ -403,15 +403,15 @@ EXPORT_SYMBOL_NS_GPL(cxl_map_pmu_regs, CXL);
static int cxl_map_regblock(struct cxl_register_map *map) { - struct device *dev = map->dev; + struct device *host = map->host;
map->base = ioremap(map->resource, map->max_size); if (!map->base) { - dev_err(dev, "failed to map registers\n"); + dev_err(host, "failed to map registers\n"); return -ENOMEM; }
- dev_dbg(dev, "Mapped CXL Memory Device resource %pa\n", &map->resource); + dev_dbg(host, "Mapped CXL Memory Device resource %pa\n", &map->resource); return 0; }
@@ -425,28 +425,28 @@ static int cxl_probe_regs(struct cxl_register_map *map) { struct cxl_component_reg_map *comp_map; struct cxl_device_reg_map *dev_map; - struct device *dev = map->dev; + struct device *host = map->host; void __iomem *base = map->base;
switch (map->reg_type) { case CXL_REGLOC_RBI_COMPONENT: comp_map = &map->component_map; - cxl_probe_component_regs(dev, base, comp_map); - dev_dbg(dev, "Set up component registers\n"); + cxl_probe_component_regs(host, base, comp_map); + dev_dbg(host, "Set up component registers\n"); break; case CXL_REGLOC_RBI_MEMDEV: dev_map = &map->device_map; - cxl_probe_device_regs(dev, base, dev_map); + cxl_probe_device_regs(host, base, dev_map); if (!dev_map->status.valid || !dev_map->mbox.valid || !dev_map->memdev.valid) { - dev_err(dev, "registers not found: %s%s%s\n", + dev_err(host, "registers not found: %s%s%s\n", !dev_map->status.valid ? "status " : "", !dev_map->mbox.valid ? "mbox " : "", !dev_map->memdev.valid ? "memdev " : ""); return -ENXIO; }
- dev_dbg(dev, "Probing device registers...\n"); + dev_dbg(host, "Probing device registers...\n"); break; default: break; diff --git a/drivers/cxl/cxl.h b/drivers/cxl/cxl.h index 76d92561af29..b5b015b661ea 100644 --- a/drivers/cxl/cxl.h +++ b/drivers/cxl/cxl.h @@ -247,7 +247,7 @@ struct cxl_pmu_reg_map {
/** * struct cxl_register_map - DVSEC harvested register block mapping parameters - * @dev: device for devm operations and logging + * @host: device for devm operations and logging * @base: virtual base of the register-block-BAR + @block_offset * @resource: physical resource base of the register block * @max_size: maximum mapping size to perform register search @@ -257,7 +257,7 @@ struct cxl_pmu_reg_map { * @pmu_map: cxl_reg_maps for CXL Performance Monitoring Units */ struct cxl_register_map { - struct device *dev; + struct device *host; void __iomem *base; resource_size_t resource; resource_size_t max_size; diff --git a/drivers/cxl/pci.c b/drivers/cxl/pci.c index 33c48370a830..8bece1e2e249 100644 --- a/drivers/cxl/pci.c +++ b/drivers/cxl/pci.c @@ -474,7 +474,7 @@ static int cxl_rcrb_get_comp_regs(struct pci_dev *pdev, resource_size_t component_reg_phys;
*map = (struct cxl_register_map) { - .dev = &pdev->dev, + .host = &pdev->dev, .resource = CXL_RESOURCE_NONE, };