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| author | Dan Williams <dan.j.williams@intel.com> | 2023-09-14 20:29:52 -0700 |
|---|---|---|
| committer | Dan Williams <dan.j.williams@intel.com> | 2023-09-15 21:45:55 -0700 |
| commit | 7914992b37d5a4b165e65a32a7723afde9356720 (patch) | |
| tree | c9036884249a9ae2e45686a7af8677109e4a3e0f /drivers/cxl/core/port.c | |
| parent | 18f35dc9314db89e2d215951e5afa3e636b72baf (diff) | |
| download | linux-stable-7914992b37d5a4b165e65a32a7723afde9356720.tar.gz linux-stable-7914992b37d5a4b165e65a32a7723afde9356720.tar.bz2 linux-stable-7914992b37d5a4b165e65a32a7723afde9356720.zip | |
cxl/port: Quiet warning messages from the cxl_test environment
The cxl_test platform device CXL port hierarchy is useful for testing,
but throws warning messages of the form:
cxl_mem mem2: at cxl_root_port.1 no parent for dport: platform
cxl_mem mem3: at cxl_root_port.2 no parent for dport: platform
cxl_mem mem4: at cxl_root_port.3 no parent for dport: platform
cxl_mem mem5: at cxl_root_port.0 no parent for dport: platform
cxl_mem mem6: at cxl_root_port.1 no parent for dport: platform
cxl_mem mem7: at cxl_root_port.2 no parent for dport: platform
cxl_mem mem8: at cxl_root_port.3 no parent for dport: platform
cxl_mem mem9: at cxl_root_port.4 no parent for dport: platform
cxl_mem mem10: at cxl_root_port.4 no parent for dport: platform
...and this message when running testing in QEMU:
cxl_region region4: Bypassing cpu_cache_invalidate_memregion() for testing!
Noisy cxl_test warnings have caused other regressions to be missed. In
the interest of using cxl_test for early detection of dev_err() and
dev_warn() messages, silence platform device topology and
cache-invalidation messages.
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Diffstat (limited to 'drivers/cxl/core/port.c')
| -rw-r--r-- | drivers/cxl/core/port.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/drivers/cxl/core/port.c b/drivers/cxl/core/port.c index 724be8448eb4..86568fb08eee 100644 --- a/drivers/cxl/core/port.c +++ b/drivers/cxl/core/port.c @@ -1,5 +1,6 @@ // SPDX-License-Identifier: GPL-2.0-only /* Copyright(c) 2020 Intel Corporation. All rights reserved. */ +#include <linux/platform_device.h> #include <linux/memregion.h> #include <linux/workqueue.h> #include <linux/debugfs.h> @@ -1463,7 +1464,11 @@ retry: struct cxl_dport *dport; struct cxl_port *port; - if (!dport_dev) + /* + * The terminal "grandparent" in PCI is NULL and @platform_bus + * for platform devices + */ + if (!dport_dev || dport_dev == &platform_bus) return 0; uport_dev = dport_dev->parent; |