6.1-stable review patch. If anyone has any objections, please let me know.
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From: Robert Richter rrichter@amd.com
[ Upstream commit f3cd264c4ec1ab9b8918f3b083cfc13c5e7c26b7 ]
CXL ports are added in a couple of code paths using devm_cxl_add_port(). Debug messages are individually generated, but are incomplete and inconsistent. Change this by moving its generation to devm_cxl_add_port(). This unifies the messages and reduces code duplication. Also, generate messages on failure. Use a __devm_cxl_add_port() wrapper to keep the readability of the error exits.
Signed-off-by: Robert Richter rrichter@amd.com Link: https://lore.kernel.org/r/20221018132341.76259-4-rrichter@amd.com Signed-off-by: Dan Williams dan.j.williams@intel.com Stable-dep-of: 98a04c7aced2 ("cxl/region: Fix x1 root-decoder granularity calculations") Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/cxl/acpi.c | 2 -- drivers/cxl/core/port.c | 51 +++++++++++++++++++++++++++++++---------- 2 files changed, 39 insertions(+), 14 deletions(-)
diff --git a/drivers/cxl/acpi.c b/drivers/cxl/acpi.c index 07b184382707e..dd610556a3afa 100644 --- a/drivers/cxl/acpi.c +++ b/drivers/cxl/acpi.c @@ -219,7 +219,6 @@ static int add_host_bridge_uport(struct device *match, void *arg) port = devm_cxl_add_port(host, match, dport->component_reg_phys, dport); if (IS_ERR(port)) return PTR_ERR(port); - dev_dbg(host, "%s: add: %s\n", dev_name(match), dev_name(&port->dev));
return 0; } @@ -465,7 +464,6 @@ static int cxl_acpi_probe(struct platform_device *pdev) root_port = devm_cxl_add_port(host, host, CXL_RESOURCE_NONE, NULL); if (IS_ERR(root_port)) return PTR_ERR(root_port); - dev_dbg(host, "add: %s\n", dev_name(&root_port->dev));
rc = bus_for_each_dev(adev->dev.bus, NULL, root_port, add_host_bridge_dport); diff --git a/drivers/cxl/core/port.c b/drivers/cxl/core/port.c index e7556864ea808..93560d749aed8 100644 --- a/drivers/cxl/core/port.c +++ b/drivers/cxl/core/port.c @@ -655,16 +655,10 @@ static struct cxl_port *cxl_port_alloc(struct device *uport, return ERR_PTR(rc); }
-/** - * devm_cxl_add_port - register a cxl_port in CXL memory decode hierarchy - * @host: host device for devm operations - * @uport: "physical" device implementing this upstream port - * @component_reg_phys: (optional) for configurable cxl_port instances - * @parent_dport: next hop up in the CXL memory decode hierarchy - */ -struct cxl_port *devm_cxl_add_port(struct device *host, struct device *uport, - resource_size_t component_reg_phys, - struct cxl_dport *parent_dport) +static struct cxl_port *__devm_cxl_add_port(struct device *host, + struct device *uport, + resource_size_t component_reg_phys, + struct cxl_dport *parent_dport) { struct cxl_port *port; struct device *dev; @@ -702,6 +696,41 @@ struct cxl_port *devm_cxl_add_port(struct device *host, struct device *uport, put_device(dev); return ERR_PTR(rc); } + +/** + * devm_cxl_add_port - register a cxl_port in CXL memory decode hierarchy + * @host: host device for devm operations + * @uport: "physical" device implementing this upstream port + * @component_reg_phys: (optional) for configurable cxl_port instances + * @parent_dport: next hop up in the CXL memory decode hierarchy + */ +struct cxl_port *devm_cxl_add_port(struct device *host, struct device *uport, + resource_size_t component_reg_phys, + struct cxl_dport *parent_dport) +{ + struct cxl_port *port, *parent_port; + + port = __devm_cxl_add_port(host, uport, component_reg_phys, + parent_dport); + + parent_port = parent_dport ? parent_dport->port : NULL; + if (IS_ERR(port)) { + dev_dbg(uport, "Failed to add %s%s%s%s: %ld\n", + dev_name(&port->dev), + parent_port ? " to " : "", + parent_port ? dev_name(&parent_port->dev) : "", + parent_port ? "" : " (root port)", + PTR_ERR(port)); + } else { + dev_dbg(uport, "%s added%s%s%s\n", + dev_name(&port->dev), + parent_port ? " to " : "", + parent_port ? dev_name(&parent_port->dev) : "", + parent_port ? "" : " (root port)"); + } + + return port; +} EXPORT_SYMBOL_NS_GPL(devm_cxl_add_port, CXL);
struct pci_bus *cxl_port_to_pci_bus(struct cxl_port *port) @@ -1147,8 +1176,6 @@ int devm_cxl_add_endpoint(struct cxl_memdev *cxlmd, if (IS_ERR(endpoint)) return PTR_ERR(endpoint);
- dev_dbg(&cxlmd->dev, "add: %s\n", dev_name(&endpoint->dev)); - rc = cxl_endpoint_autoremove(cxlmd, endpoint); if (rc) return rc;