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Date: Mon, 17 May 2021 16:01:13 +0200
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-kernel@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
stable@...r.kernel.org, Jason Gunthorpe <jgg@...dia.com>,
Dave Jiang <dave.jiang@...el.com>,
Vinod Koul <vkoul@...nel.org>, Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.11 162/329] dmaengine: idxd: fix engine conf_dev lifetime
From: Dave Jiang <dave.jiang@...el.com>
[ Upstream commit 75b911309060f42ba94bbbf46f5f497d35d5cd02 ]
Remove devm_* allocation and fix engine->conf_dev 'struct device'
lifetime. Address issues flagged by CONFIG_DEBUG_KOBJECT_RELEASE.
Add release functions in order to free the allocated memory at the
engine conf_dev destruction time.
Reported-by: Jason Gunthorpe <jgg@...dia.com>
Fixes: bfe1d56091c1 ("dmaengine: idxd: Init and probe for Intel data accelerators")
Signed-off-by: Dave Jiang <dave.jiang@...el.com>
Link: https://lore.kernel.org/r/161852986460.2203940.16603218225412118431.stgit@djiang5-desk3.ch.intel.com
Signed-off-by: Vinod Koul <vkoul@...nel.org>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
drivers/dma/idxd/device.c | 2 +-
drivers/dma/idxd/idxd.h | 3 +-
drivers/dma/idxd/init.c | 60 +++++++++++++++++++++++++-------
drivers/dma/idxd/sysfs.c | 72 +++++++++++++++++++--------------------
4 files changed, 86 insertions(+), 51 deletions(-)
diff --git a/drivers/dma/idxd/device.c b/drivers/dma/idxd/device.c
index c4183294a704..be1dcddfe3c4 100644
--- a/drivers/dma/idxd/device.c
+++ b/drivers/dma/idxd/device.c
@@ -786,7 +786,7 @@ static int idxd_engines_setup(struct idxd_device *idxd)
}
for (i = 0; i < idxd->max_engines; i++) {
- eng = &idxd->engines[i];
+ eng = idxd->engines[i];
group = eng->group;
if (!group)
diff --git a/drivers/dma/idxd/idxd.h b/drivers/dma/idxd/idxd.h
index 6cade6a05314..b9b7e8e8c384 100644
--- a/drivers/dma/idxd/idxd.h
+++ b/drivers/dma/idxd/idxd.h
@@ -195,7 +195,7 @@ struct idxd_device {
struct completion *cmd_done;
struct idxd_group *groups;
struct idxd_wq **wqs;
- struct idxd_engine *engines;
+ struct idxd_engine **engines;
struct iommu_sva *sva;
unsigned int pasid;
@@ -259,6 +259,7 @@ extern bool support_enqcmd;
extern struct device_type dsa_device_type;
extern struct device_type iax_device_type;
extern struct device_type idxd_wq_device_type;
+extern struct device_type idxd_engine_device_type;
static inline bool is_dsa_dev(struct device *dev)
{
diff --git a/drivers/dma/idxd/init.c b/drivers/dma/idxd/init.c
index ffc00152891e..68b58869b0cc 100644
--- a/drivers/dma/idxd/init.c
+++ b/drivers/dma/idxd/init.c
@@ -192,6 +192,46 @@ static int idxd_setup_wqs(struct idxd_device *idxd)
return rc;
}
+static int idxd_setup_engines(struct idxd_device *idxd)
+{
+ struct idxd_engine *engine;
+ struct device *dev = &idxd->pdev->dev;
+ int i, rc;
+
+ idxd->engines = kcalloc_node(idxd->max_engines, sizeof(struct idxd_engine *),
+ GFP_KERNEL, dev_to_node(dev));
+ if (!idxd->engines)
+ return -ENOMEM;
+
+ for (i = 0; i < idxd->max_engines; i++) {
+ engine = kzalloc_node(sizeof(*engine), GFP_KERNEL, dev_to_node(dev));
+ if (!engine) {
+ rc = -ENOMEM;
+ goto err;
+ }
+
+ engine->id = i;
+ engine->idxd = idxd;
+ device_initialize(&engine->conf_dev);
+ engine->conf_dev.parent = &idxd->conf_dev;
+ engine->conf_dev.type = &idxd_engine_device_type;
+ rc = dev_set_name(&engine->conf_dev, "engine%d.%d", idxd->id, engine->id);
+ if (rc < 0) {
+ put_device(&engine->conf_dev);
+ goto err;
+ }
+
+ idxd->engines[i] = engine;
+ }
+
+ return 0;
+
+ err:
+ while (--i >= 0)
+ put_device(&idxd->engines[i]->conf_dev);
+ return rc;
+}
+
static int idxd_setup_internals(struct idxd_device *idxd)
{
struct device *dev = &idxd->pdev->dev;
@@ -203,6 +243,10 @@ static int idxd_setup_internals(struct idxd_device *idxd)
if (rc < 0)
return rc;
+ rc = idxd_setup_engines(idxd);
+ if (rc < 0)
+ goto err_engine;
+
idxd->groups = devm_kcalloc(dev, idxd->max_groups,
sizeof(struct idxd_group), GFP_KERNEL);
if (!idxd->groups) {
@@ -217,19 +261,6 @@ static int idxd_setup_internals(struct idxd_device *idxd)
idxd->groups[i].tc_b = -1;
}
- idxd->engines = devm_kcalloc(dev, idxd->max_engines,
- sizeof(struct idxd_engine), GFP_KERNEL);
- if (!idxd->engines) {
- rc = -ENOMEM;
- goto err;
- }
-
-
- for (i = 0; i < idxd->max_engines; i++) {
- idxd->engines[i].idxd = idxd;
- idxd->engines[i].id = i;
- }
-
idxd->wq = create_workqueue(dev_name(dev));
if (!idxd->wq) {
rc = -ENOMEM;
@@ -239,6 +270,9 @@ static int idxd_setup_internals(struct idxd_device *idxd)
return 0;
err:
+ for (i = 0; i < idxd->max_engines; i++)
+ put_device(&idxd->engines[i]->conf_dev);
+ err_engine:
for (i = 0; i < idxd->max_wqs; i++)
put_device(&idxd->wqs[i]->conf_dev);
return rc;
diff --git a/drivers/dma/idxd/sysfs.c b/drivers/dma/idxd/sysfs.c
index 409b3ce52f07..ab02e3b4d75d 100644
--- a/drivers/dma/idxd/sysfs.c
+++ b/drivers/dma/idxd/sysfs.c
@@ -26,11 +26,6 @@ static struct device_type idxd_group_device_type = {
.release = idxd_conf_sub_device_release,
};
-static struct device_type idxd_engine_device_type = {
- .name = "engine",
- .release = idxd_conf_sub_device_release,
-};
-
static int idxd_config_bus_match(struct device *dev,
struct device_driver *drv)
{
@@ -464,6 +459,19 @@ static const struct attribute_group *idxd_engine_attribute_groups[] = {
NULL,
};
+static void idxd_conf_engine_release(struct device *dev)
+{
+ struct idxd_engine *engine = container_of(dev, struct idxd_engine, conf_dev);
+
+ kfree(engine);
+}
+
+struct device_type idxd_engine_device_type = {
+ .name = "engine",
+ .release = idxd_conf_engine_release,
+ .groups = idxd_engine_attribute_groups,
+};
+
/* Group attributes */
static void idxd_set_free_tokens(struct idxd_device *idxd)
@@ -626,7 +634,7 @@ static ssize_t group_engines_show(struct device *dev,
struct idxd_device *idxd = group->idxd;
for (i = 0; i < idxd->max_engines; i++) {
- struct idxd_engine *engine = &idxd->engines[i];
+ struct idxd_engine *engine = idxd->engines[i];
if (!engine->group)
continue;
@@ -1634,37 +1642,27 @@ struct device_type iax_device_type = {
.groups = idxd_attribute_groups,
};
-static int idxd_setup_engine_sysfs(struct idxd_device *idxd)
+static int idxd_register_engine_devices(struct idxd_device *idxd)
{
- struct device *dev = &idxd->pdev->dev;
- int i, rc;
+ int i, j, rc;
for (i = 0; i < idxd->max_engines; i++) {
- struct idxd_engine *engine = &idxd->engines[i];
-
- engine->conf_dev.parent = &idxd->conf_dev;
- dev_set_name(&engine->conf_dev, "engine%d.%d",
- idxd->id, engine->id);
- engine->conf_dev.bus = idxd_get_bus_type(idxd);
- engine->conf_dev.groups = idxd_engine_attribute_groups;
- engine->conf_dev.type = &idxd_engine_device_type;
- dev_dbg(dev, "Engine device register: %s\n",
- dev_name(&engine->conf_dev));
- rc = device_register(&engine->conf_dev);
- if (rc < 0) {
- put_device(&engine->conf_dev);
+ struct idxd_engine *engine = idxd->engines[i];
+
+ rc = device_add(&engine->conf_dev);
+ if (rc < 0)
goto cleanup;
- }
}
return 0;
cleanup:
- while (i--) {
- struct idxd_engine *engine = &idxd->engines[i];
+ j = i - 1;
+ for (; i < idxd->max_engines; i++)
+ put_device(&idxd->engines[i]->conf_dev);
- device_unregister(&engine->conf_dev);
- }
+ while (j--)
+ device_unregister(&idxd->engines[j]->conf_dev);
return rc;
}
@@ -1741,23 +1739,25 @@ int idxd_register_devices(struct idxd_device *idxd)
goto err_wq;
}
- rc = idxd_setup_group_sysfs(idxd);
+ rc = idxd_register_engine_devices(idxd);
if (rc < 0) {
- /* unregister conf dev */
- dev_dbg(dev, "Group sysfs registering failed: %d\n", rc);
- goto err;
+ dev_dbg(dev, "Engine devices registering failed: %d\n", rc);
+ goto err_engine;
}
- rc = idxd_setup_engine_sysfs(idxd);
+ rc = idxd_setup_group_sysfs(idxd);
if (rc < 0) {
/* unregister conf dev */
- dev_dbg(dev, "Engine sysfs registering failed: %d\n", rc);
- goto err;
+ dev_dbg(dev, "Group sysfs registering failed: %d\n", rc);
+ goto err_group;
}
return 0;
- err:
+ err_group:
+ for (i = 0; i < idxd->max_engines; i++)
+ device_unregister(&idxd->engines[i]->conf_dev);
+ err_engine:
for (i = 0; i < idxd->max_wqs; i++)
device_unregister(&idxd->wqs[i]->conf_dev);
err_wq:
@@ -1776,7 +1776,7 @@ void idxd_unregister_devices(struct idxd_device *idxd)
}
for (i = 0; i < idxd->max_engines; i++) {
- struct idxd_engine *engine = &idxd->engines[i];
+ struct idxd_engine *engine = idxd->engines[i];
device_unregister(&engine->conf_dev);
}
--
2.30.2
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