6.6-stable review patch. If anyone has any objections, please let me know.
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From: Robert Richter rrichter@amd.com
[ Upstream commit d90acdf49e18029cfe4194475c45ef143657737a ]
Broken target lists are hard to discover as the driver fails at a later initialization stage. Add an error message for this.
Example log messages:
cxl_mem mem1: failed to find endpoint6:0000:e0:01.3 in target list of decoder1.1 cxl_port endpoint6: failed to register decoder6.0: -6 cxl_port endpoint6: probe: 0
Signed-off-by: Robert Richter rrichter@amd.com Reviewed-by: Gregory Price gourry@gourry.net Reviewed-by: Jonathan Cameron Jonathan.Cameron@huawei.com Reviewed-by: Dave Jiang dave.jiang@intel.com Reviewed-by: Dan Williams dan.j.williams@intel.com Reviewed-by: Alison Schofield alison.schofield@intel.com Reviewed-by: "Fabio M. De Francesco" fabio.m.de.francesco@linux.intel.com Tested-by: Gregory Price gourry@gourry.net Acked-by: Dan Williams dan.j.williams@intel.com Link: https://patch.msgid.link/20250509150700.2817697-14-rrichter@amd.com Signed-off-by: Dave Jiang dave.jiang@intel.com Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/cxl/core/region.c | 7 +++++++ 1 file changed, 7 insertions(+)
diff --git a/drivers/cxl/core/region.c b/drivers/cxl/core/region.c index d7f7f88009d7d..1728cae1e8409 100644 --- a/drivers/cxl/core/region.c +++ b/drivers/cxl/core/region.c @@ -1653,6 +1653,13 @@ static int find_pos_and_ways(struct cxl_port *port, struct range *range, } put_device(dev);
+ if (rc) + dev_err(port->uport_dev, + "failed to find %s:%s in target list of %s\n", + dev_name(&port->dev), + dev_name(port->parent_dport->dport_dev), + dev_name(&cxlsd->cxld.dev)); + return rc; }