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path: root/drivers/misc/cxl/sysfs.c
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Diffstat (limited to 'drivers/misc/cxl/sysfs.c')
-rw-r--r--drivers/misc/cxl/sysfs.c16
1 files changed, 12 insertions, 4 deletions
diff --git a/drivers/misc/cxl/sysfs.c b/drivers/misc/cxl/sysfs.c
index 95285b7f636f..90aa4eee8ccd 100644
--- a/drivers/misc/cxl/sysfs.c
+++ b/drivers/misc/cxl/sysfs.c
@@ -343,12 +343,20 @@ static ssize_t prefault_mode_store(struct device *device,
struct cxl_afu *afu = to_cxl_afu(device);
enum prefault_modes mode = -1;
- if (!strncmp(buf, "work_element_descriptor", 23))
- mode = CXL_PREFAULT_WED;
- if (!strncmp(buf, "all", 3))
- mode = CXL_PREFAULT_ALL;
if (!strncmp(buf, "none", 4))
mode = CXL_PREFAULT_NONE;
+ else {
+ if (!radix_enabled()) {
+
+ /* only allowed when not in radix mode */
+ if (!strncmp(buf, "work_element_descriptor", 23))
+ mode = CXL_PREFAULT_WED;
+ if (!strncmp(buf, "all", 3))
+ mode = CXL_PREFAULT_ALL;
+ } else {
+ dev_err(device, "Cannot prefault with radix enabled\n");
+ }
+ }
if (mode == -1)
return -EINVAL;