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From: Dmitry Torokhov <dmitry.torokhov@gmail.com>
To: Robin van der Gracht <robin@protonic.nl>,
	Miguel Ojeda Sandonis <miguel.ojeda.sandonis@gmail.com>
Cc: linux-kernel@vger.kernel.org,
	Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	Linus Walleij <linus.walleij@linaro.org>
Subject: [PATCH 1/3] auxdisplay: ht16k33: do not try to free fbdev
Date: Tue, 31 Jan 2017 12:54:36 -0800	[thread overview]
Message-ID: <20170131205438.7531-1-dmitry.torokhov@gmail.com> (raw)

'fbdev' is allocated as part of larger ht16k33_priv structure; trying to
free it will cause troubles.

Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
---

Note that the patches have not been tried on a real hardware.

I am pretty confident in #1 and #3, but #2 is larger and it would be great
if someone with hardware tried running it before it gets applied.

Thanks!

 drivers/auxdisplay/ht16k33.c | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/drivers/auxdisplay/ht16k33.c b/drivers/auxdisplay/ht16k33.c
index eeb323f56c07..f2f304b3f061 100644
--- a/drivers/auxdisplay/ht16k33.c
+++ b/drivers/auxdisplay/ht16k33.c
@@ -378,7 +378,7 @@ static int ht16k33_probe(struct i2c_client *client,
 	fbdev->buffer = (unsigned char *) get_zeroed_page(GFP_KERNEL);
 	if (!fbdev->buffer) {
 		err = -ENOMEM;
-		goto err_free_fbdev;
+		goto err_destroy_wq;
 	}
 
 	fbdev->cache = devm_kmalloc(&client->dev, HT16K33_FB_SIZE, GFP_KERNEL);
@@ -510,8 +510,6 @@ static int ht16k33_probe(struct i2c_client *client,
 	framebuffer_release(fbdev->info);
 err_fbdev_buffer:
 	free_page((unsigned long) fbdev->buffer);
-err_free_fbdev:
-	kfree(fbdev);
 err_destroy_wq:
 	destroy_workqueue(priv->workqueue);
 
-- 
2.11.0.483.g087da7b7c-goog

             reply	other threads:[~2017-01-31 20:55 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-01-31 20:54 Dmitry Torokhov [this message]
2017-01-31 20:54 ` [PATCH 2/3] auxdisplay: ht16k33: rework input device initialization Dmitry Torokhov
2017-02-08 16:48   ` Robin van der Gracht
2017-02-09 18:10     ` Dmitry Torokhov
2017-01-31 20:54 ` [PATCH 3/3] auxdisplay: ht16k33: remove private workqueue Dmitry Torokhov
2017-02-08 16:52   ` Robin van der Gracht
2017-02-07  7:45 ` [PATCH 1/3] auxdisplay: ht16k33: do not try to free fbdev Robin van der Gracht
2017-02-08 16:12 ` Robin van der Gracht

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