cxl/region: Only warn about cpu_cache_invalidate_memregion() once

No need for more than once per module load.

Signed-off-by: Davidlohr Bueso <dave@stgolabs.net>
Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Reviewed-by: Dave Jiang <dave.jiang@intel.com>
Link: https://lore.kernel.org/r/20221215183836.24136-1-dave@stgolabs.net
Signed-off-by: Dan Williams <dan.j.williams@intel.com>

diff --git a/drivers/cxl/core/region.c b/drivers/cxl/core/region.c
index 02f28da..c11a6ab 100644 (file)
--- a/drivers/cxl/core/region.c
+++ b/drivers/cxl/core/region.c
@@ -1967,7 +1967,7 @@ static int cxl_region_invalidate_memregion(struct cxl_region *cxlr)
 
        if (!cpu_cache_has_invalidate_memregion()) {
                if (IS_ENABLED(CONFIG_CXL_REGION_INVALIDATION_TEST)) {
-                       dev_warn(
+                       dev_warn_once(
                                &cxlr->dev,
                                "Bypassing cpu_cache_invalidate_memregion() for testing!\n");
                        clear_bit(CXL_REGION_F_INCOHERENT, &cxlr->flags);