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authorAlison Schofield <alison.schofield@intel.com>2021-10-07 14:34:26 -0700
committerDan Williams <dan.j.williams@intel.com>2021-10-08 01:05:31 -0700
commit91a45b12d49e2b43d86caba25ed59fae43344ab8 (patch)
tree1b0f00ed002a1b886f5a5dfc26c9323e02ed1346 /drivers/cxl
parented97afb53365cd03dde266c9644334a558fe5a16 (diff)
downloadlinux-91a45b12d49e2b43d86caba25ed59fae43344ab8.tar.bz2
cxl/acpi: Do not fail cxl_acpi_probe() based on a missing CHBS
When an ACPI0016 Host Bridge device is present yet no corresponding CEDT Host Bridge Structure (CHBS) exists, the ACPI probe method fails. Rather than fail, emit this warning and continue: cxl_acpi ACPI0017:00: No CHBS found for Host Bridge: ACPI0016:02 This error may occur on systems that are not compliant with the ACPI specification. Compliant systems include a CHBS entry for every CXL host bridge that is present at boot. Suggested-by: Ira Weiny <ira.weiny@intel.com> Signed-off-by: Alison Schofield <alison.schofield@intel.com> Tested-by: Vishal Verma <vishal.l.verma@intel.com> Reviewed-by: Ira Weiny <ira.weiny@intel.com> Link: https://lore.kernel.org/r/20211007213426.392644-1-alison.schofield@intel.com Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Diffstat (limited to 'drivers/cxl')
-rw-r--r--drivers/cxl/acpi.c10
1 files changed, 6 insertions, 4 deletions
diff --git a/drivers/cxl/acpi.c b/drivers/cxl/acpi.c
index af1c6c1875ac..dadc7f64b9ff 100644
--- a/drivers/cxl/acpi.c
+++ b/drivers/cxl/acpi.c
@@ -288,7 +288,7 @@ static int add_host_bridge_uport(struct device *match, void *arg)
dport = find_dport_by_dev(root_port, match);
if (!dport) {
dev_dbg(host, "host bridge expected and not found\n");
- return -ENODEV;
+ return 0;
}
port = devm_cxl_add_port(host, match, dport->component_reg_phys,
@@ -377,9 +377,11 @@ static int add_host_bridge_dport(struct device *match, void *arg)
}
chbs = cxl_acpi_match_chbs(host, uid);
- if (IS_ERR(chbs))
- dev_dbg(host, "No CHBS found for Host Bridge: %s\n",
- dev_name(match));
+ if (IS_ERR(chbs)) {
+ dev_warn(host, "No CHBS found for Host Bridge: %s\n",
+ dev_name(match));
+ return 0;
+ }
rc = cxl_add_dport(root_port, match, uid, get_chbcr(chbs));
if (rc) {