cxl: Prevent read/write to AFU config space while AFU not configured

[linux.git] / drivers / misc / cxl / main.c

diff --git a/drivers/misc/cxl/main.c b/drivers/misc/cxl/main.c
index 62e0dfb5f15b62d64980bb008d448038f8fd3c36..2a6bf1d0a3a4f9ae2ffb2f083915df18fd4372dc 100644 (file)
--- a/drivers/misc/cxl/main.c
+++ b/drivers/misc/cxl/main.c
@@ -268,7 +268,8 @@ struct cxl_afu *cxl_alloc_afu(struct cxl *adapter, int slice)
        idr_init(&afu->contexts_idr);
        mutex_init(&afu->contexts_lock);
        spin_lock_init(&afu->afu_cntl_lock);
-
+       init_rwsem(&afu->configured_rwsem);
+       down_write(&afu->configured_rwsem);
        afu->prefault_mode = CXL_PREFAULT_NONE;
        afu->irqs_max = afu->adapter->user_irqs;