diff mbox series

[v4,3/4] remoteproc: core: Fix cdev remove and rproc del

Message ID 1623783824-13395-4-git-send-email-sidgup@codeaurora.org (mailing list archive)
State Not Applicable, archived
Headers show
Series remoteproc: core: Fixes for rproc cdev and add | expand

Commit Message

Siddharth Gupta June 15, 2021, 7:03 p.m. UTC
The rproc_char_device_remove() call currently unmaps the cdev
region instead of simply deleting the cdev that was added as a
part of the rproc_char_device_add() call. This change fixes that
behaviour, and also fixes the order in which device_del() and
cdev_del() need to be called.

Signed-off-by: Siddharth Gupta <sidgup@codeaurora.org>
Cc: stable@vger.kernel.org
---
 drivers/remoteproc/remoteproc_cdev.c | 2 +-
 drivers/remoteproc/remoteproc_core.c | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

Comments

Greg KH June 15, 2021, 7:06 p.m. UTC | #1
On Tue, Jun 15, 2021 at 12:03:43PM -0700, Siddharth Gupta wrote:
> The rproc_char_device_remove() call currently unmaps the cdev
> region instead of simply deleting the cdev that was added as a
> part of the rproc_char_device_add() call. This change fixes that
> behaviour, and also fixes the order in which device_del() and
> cdev_del() need to be called.
> 
> Signed-off-by: Siddharth Gupta <sidgup@codeaurora.org>
> Cc: stable@vger.kernel.org

Is this really needed for stable?  What bug does this solve?  ANd again,
fixes: ?
diff mbox series

Patch

diff --git a/drivers/remoteproc/remoteproc_cdev.c b/drivers/remoteproc/remoteproc_cdev.c
index 0b8a84c..4ad98b0 100644
--- a/drivers/remoteproc/remoteproc_cdev.c
+++ b/drivers/remoteproc/remoteproc_cdev.c
@@ -124,7 +124,7 @@  int rproc_char_device_add(struct rproc *rproc)
 
 void rproc_char_device_remove(struct rproc *rproc)
 {
-	__unregister_chrdev(MAJOR(rproc->dev.devt), rproc->index, 1, "remoteproc");
+	cdev_del(&rproc->cdev);
 }
 
 void __init rproc_init_cdev(void)
diff --git a/drivers/remoteproc/remoteproc_core.c b/drivers/remoteproc/remoteproc_core.c
index b65fce3..b874280 100644
--- a/drivers/remoteproc/remoteproc_core.c
+++ b/drivers/remoteproc/remoteproc_core.c
@@ -2619,7 +2619,6 @@  int rproc_del(struct rproc *rproc)
 	mutex_unlock(&rproc->lock);
 
 	rproc_delete_debug_dir(rproc);
-	rproc_char_device_remove(rproc);
 
 	/* the rproc is downref'ed as soon as it's removed from the klist */
 	mutex_lock(&rproc_list_mutex);
@@ -2630,6 +2629,7 @@  int rproc_del(struct rproc *rproc)
 	synchronize_rcu();
 
 	device_del(&rproc->dev);
+	rproc_char_device_remove(rproc);
 
 	return 0;
 }