From: "Uwe Kleine-König" <uwe@kleine-koenig.org>
To: Dan Williams <dan.j.williams@intel.com>,
Vishal Verma <vishal.l.verma@intel.com>,
Dave Jiang <dave.jiang@intel.com>,
Andrew Morton <akpm@linux-foundation.org>
Cc: linux-nvdimm@lists.01.org, linux-kernel@vger.kernel.org,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Subject: [PATCH v2 5/5] dax-device: Make remove callback return void
Date: Fri, 5 Feb 2021 23:28:42 +0100 [thread overview]
Message-ID: <20210205222842.34896-6-uwe@kleine-koenig.org> (raw)
In-Reply-To: <20210205222842.34896-1-uwe@kleine-koenig.org>
The driver core ignores the return value of struct bus_type::remove()
because there is only little that can be done. To simplify the quest to
make this function return void, let struct dax_device_driver::remove()
return void, too. All users already unconditionally return 0, this commit
makes it obvious that returning an error code isn't intended.
Signed-off-by: Uwe Kleine-König <uwe@kleine-koenig.org>
---
drivers/dax/bus.c | 5 ++---
drivers/dax/bus.h | 2 +-
drivers/dax/kmem.c | 7 ++-----
3 files changed, 5 insertions(+), 9 deletions(-)
diff --git a/drivers/dax/bus.c b/drivers/dax/bus.c
index bc425f1c52bd..0a939e28d048 100644
--- a/drivers/dax/bus.c
+++ b/drivers/dax/bus.c
@@ -178,12 +178,11 @@ static int dax_bus_remove(struct device *dev)
{
struct dax_device_driver *dax_drv = to_dax_drv(dev->driver);
struct dev_dax *dev_dax = to_dev_dax(dev);
- int ret = 0;
if (dax_drv->remove)
- ret = dax_drv->remove(dev_dax);
+ dax_drv->remove(dev_dax);
- return ret;
+ return 0;
}
static struct bus_type dax_bus_type = {
diff --git a/drivers/dax/bus.h b/drivers/dax/bus.h
index 72b92f95509f..1e946ad7780a 100644
--- a/drivers/dax/bus.h
+++ b/drivers/dax/bus.h
@@ -39,7 +39,7 @@ struct dax_device_driver {
struct list_head ids;
int match_always;
int (*probe)(struct dev_dax *dev);
- int (*remove)(struct dev_dax *dev);
+ void (*remove)(struct dev_dax *dev);
};
int __dax_driver_register(struct dax_device_driver *dax_drv,
diff --git a/drivers/dax/kmem.c b/drivers/dax/kmem.c
index 403ec42472d1..ac231cc36359 100644
--- a/drivers/dax/kmem.c
+++ b/drivers/dax/kmem.c
@@ -136,7 +136,7 @@ static int dev_dax_kmem_probe(struct dev_dax *dev_dax)
}
#ifdef CONFIG_MEMORY_HOTREMOVE
-static int dev_dax_kmem_remove(struct dev_dax *dev_dax)
+static void dev_dax_kmem_remove(struct dev_dax *dev_dax)
{
int i, success = 0;
struct device *dev = &dev_dax->dev;
@@ -176,11 +176,9 @@ static int dev_dax_kmem_remove(struct dev_dax *dev_dax)
kfree(data);
dev_set_drvdata(dev, NULL);
}
-
- return 0;
}
#else
-static int dev_dax_kmem_remove(struct dev_dax *dev_dax)
+static void dev_dax_kmem_remove(struct dev_dax *dev_dax)
{
/*
* Without hotremove purposely leak the request_mem_region() for the
@@ -190,7 +188,6 @@ static int dev_dax_kmem_remove(struct dev_dax *dev_dax)
* request_mem_region().
*/
any_hotremove_failed = true;
- return 0;
}
#endif /* CONFIG_MEMORY_HOTREMOVE */
--
2.29.2
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next prev parent reply other threads:[~2021-02-05 22:30 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-02-05 22:28 [PATCH v2 0/5] dax-device: Some cleanups Uwe Kleine-König
2021-02-05 22:28 ` [PATCH v2 1/5] dax-device: Prevent registering drivers without probe callback Uwe Kleine-König
2021-02-05 22:28 ` [PATCH v2 2/5] dax-device: Properly handle drivers without remove callback Uwe Kleine-König
2021-02-05 22:28 ` [PATCH v2 3/5] dax-device: Fix error path in dax_driver_register Uwe Kleine-König
2021-02-05 22:28 ` [PATCH v2 4/5] dax-device: Drop an empty .remove callback Uwe Kleine-König
2021-02-05 22:28 ` Uwe Kleine-König [this message]
2021-02-17 3:48 ` [PATCH v2 0/5] dax-device: Some cleanups Dan Williams
2021-02-17 3:55 ` Dan Williams
2021-02-17 6:39 ` Uwe Kleine-König
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