[PATCH v2] cxl/region: Fix memregion leaks in devm_cxl_add_region()

From: Li Zhijian
Date: Tue May 07 2024 - 01:34:51 EST


Move the mode verification to __create_region() before allocating the
memregion to avoid the memregion leaks.

Fixes: 6e099264185d ("cxl/region: Add volatile region creation support")
Signed-off-by: Li Zhijian <lizhijian@xxxxxxxxxxx>
---
V2: Move the mode verification to __create_region() # Dan
---
drivers/cxl/core/region.c | 18 +++++++++---------
1 file changed, 9 insertions(+), 9 deletions(-)

diff --git a/drivers/cxl/core/region.c b/drivers/cxl/core/region.c
index 812b2948b6c6..18b95149640b 100644
--- a/drivers/cxl/core/region.c
+++ b/drivers/cxl/core/region.c
@@ -2352,15 +2352,6 @@ static struct cxl_region *devm_cxl_add_region(struct cxl_root_decoder *cxlrd,
struct device *dev;
int rc;

- switch (mode) {
- case CXL_DECODER_RAM:
- case CXL_DECODER_PMEM:
- break;
- default:
- dev_err(&cxlrd->cxlsd.cxld.dev, "unsupported mode %d\n", mode);
- return ERR_PTR(-EINVAL);
- }
-
cxlr = cxl_region_alloc(cxlrd, id);
if (IS_ERR(cxlr))
return cxlr;
@@ -2415,6 +2406,15 @@ static struct cxl_region *__create_region(struct cxl_root_decoder *cxlrd,
{
int rc;

+ switch (mode) {
+ case CXL_DECODER_RAM:
+ case CXL_DECODER_PMEM:
+ break;
+ default:
+ dev_err(&cxlrd->cxlsd.cxld.dev, "unsupported mode %d\n", mode);
+ return ERR_PTR(-EINVAL);
+ }
+
rc = memregion_alloc(GFP_KERNEL);
if (rc < 0)
return ERR_PTR(rc);
--
2.29.2