This is a note to let you know that I've just added the patch titled
cxl/pci: Clarify devm host for memdev relative setup
to the 6.5-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
cxl-pci-clarify-devm-host-for-memdev-relative-setup.patch
and it can be found in the queue-6.5 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 12a88d985a6f873861623506777e86a350dba0d4
Author: Dan Williams <dan.j.williams@xxxxxxxxx>
Date: Wed Oct 4 16:04:49 2023 -0700
cxl/pci: Clarify devm host for memdev relative setup
[ Upstream commit f29a824b0b6710328a78b018de3c2cfa9db65876 ]
It is all too easy to get confused about @dev usage in the CXL driver
stack. Before adding a new cxl_pci_probe() setup operation that has a
devm lifetime dependent on @cxlds->dev binding, but also references
@cxlmd->dev, and prints messages, rework the devm_cxl_add_memdev() and
cxl_memdev_setup_fw_upload() function signatures to make this
distinction explicit. I.e. pass in the devm context as an @host argument
rather than infer it from other objects.
This is in preparation for adding a devm_cxl_sanitize_setup_notifier().
Note the whitespace fixup near the change of the devm_cxl_add_memdev()
signature. That uncaught typo originated in the patch that added
cxl_memdev_security_init().
Reviewed-by: Jonathan Cameron <Jonathan.Cameron@xxxxxxxxxx>
Reviewed-by: Ira Weiny <ira.weiny@xxxxxxxxx>
Reviewed-by: Dave Jiang <dave.jiang@xxxxxxxxx>
Signed-off-by: Dan Williams <dan.j.williams@xxxxxxxxx>
Stable-dep-of: 5f2da1971446 ("cxl/pci: Fix sanitize notifier setup")
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/cxl/core/memdev.c b/drivers/cxl/core/memdev.c
index 6efe4e2a2cf53..63353d9903745 100644
--- a/drivers/cxl/core/memdev.c
+++ b/drivers/cxl/core/memdev.c
@@ -960,12 +960,12 @@ static const struct fw_upload_ops cxl_memdev_fw_ops = {
.cleanup = cxl_fw_cleanup,
};
-static void devm_cxl_remove_fw_upload(void *fwl)
+static void cxl_remove_fw_upload(void *fwl)
{
firmware_upload_unregister(fwl);
}
-int cxl_memdev_setup_fw_upload(struct cxl_memdev_state *mds)
+int devm_cxl_setup_fw_upload(struct device *host, struct cxl_memdev_state *mds)
{
struct cxl_dev_state *cxlds = &mds->cxlds;
struct device *dev = &cxlds->cxlmd->dev;
@@ -978,10 +978,9 @@ int cxl_memdev_setup_fw_upload(struct cxl_memdev_state *mds)
&cxl_memdev_fw_ops, mds);
if (IS_ERR(fwl))
return PTR_ERR(fwl);
-
- return devm_add_action_or_reset(cxlds->dev, devm_cxl_remove_fw_upload, fwl);
+ return devm_add_action_or_reset(host, cxl_remove_fw_upload, fwl);
}
-EXPORT_SYMBOL_NS_GPL(cxl_memdev_setup_fw_upload, CXL);
+EXPORT_SYMBOL_NS_GPL(devm_cxl_setup_fw_upload, CXL);
static const struct file_operations cxl_memdev_fops = {
.owner = THIS_MODULE,
@@ -1019,9 +1018,10 @@ static int cxl_memdev_security_init(struct cxl_memdev *cxlmd)
}
return devm_add_action_or_reset(cxlds->dev, put_sanitize, mds);
- }
+}
-struct cxl_memdev *devm_cxl_add_memdev(struct cxl_dev_state *cxlds)
+struct cxl_memdev *devm_cxl_add_memdev(struct device *host,
+ struct cxl_dev_state *cxlds)
{
struct cxl_memdev *cxlmd;
struct device *dev;
@@ -1053,7 +1053,7 @@ struct cxl_memdev *devm_cxl_add_memdev(struct cxl_dev_state *cxlds)
if (rc)
goto err;
- rc = devm_add_action_or_reset(cxlds->dev, cxl_memdev_unregister, cxlmd);
+ rc = devm_add_action_or_reset(host, cxl_memdev_unregister, cxlmd);
if (rc)
return ERR_PTR(rc);
return cxlmd;
diff --git a/drivers/cxl/cxlmem.h b/drivers/cxl/cxlmem.h
index 55f00ad17a772..fdb2c8dd98d0f 100644
--- a/drivers/cxl/cxlmem.h
+++ b/drivers/cxl/cxlmem.h
@@ -84,9 +84,10 @@ static inline bool is_cxl_endpoint(struct cxl_port *port)
return is_cxl_memdev(port->uport_dev);
}
-struct cxl_memdev *devm_cxl_add_memdev(struct cxl_dev_state *cxlds);
+struct cxl_memdev *devm_cxl_add_memdev(struct device *host,
+ struct cxl_dev_state *cxlds);
struct cxl_memdev_state;
-int cxl_memdev_setup_fw_upload(struct cxl_memdev_state *mds);
+int devm_cxl_setup_fw_upload(struct device *host, struct cxl_memdev_state *mds);
int devm_cxl_dpa_reserve(struct cxl_endpoint_decoder *cxled,
resource_size_t base, resource_size_t len,
resource_size_t skipped);
diff --git a/drivers/cxl/pci.c b/drivers/cxl/pci.c
index 0ffa62088c6d2..5b22460c51c62 100644
--- a/drivers/cxl/pci.c
+++ b/drivers/cxl/pci.c
@@ -868,11 +868,11 @@ static int cxl_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id)
if (rc)
return rc;
- cxlmd = devm_cxl_add_memdev(cxlds);
+ cxlmd = devm_cxl_add_memdev(&pdev->dev, cxlds);
if (IS_ERR(cxlmd))
return PTR_ERR(cxlmd);
- rc = cxl_memdev_setup_fw_upload(mds);
+ rc = devm_cxl_setup_fw_upload(&pdev->dev, mds);
if (rc)
return rc;
diff --git a/tools/testing/cxl/test/mem.c b/tools/testing/cxl/test/mem.c
index 464fc39ed2776..68118c37f0b56 100644
--- a/tools/testing/cxl/test/mem.c
+++ b/tools/testing/cxl/test/mem.c
@@ -1450,11 +1450,11 @@ static int cxl_mock_mem_probe(struct platform_device *pdev)
mdata->mes.mds = mds;
cxl_mock_add_event_logs(&mdata->mes);
- cxlmd = devm_cxl_add_memdev(cxlds);
+ cxlmd = devm_cxl_add_memdev(&pdev->dev, cxlds);
if (IS_ERR(cxlmd))
return PTR_ERR(cxlmd);
- rc = cxl_memdev_setup_fw_upload(mds);
+ rc = devm_cxl_setup_fw_upload(&pdev->dev, mds);
if (rc)
return rc;
