linux-kernel - [PATCH v2] fbdev/hpfb: Fix an error handling path in hpfb_dio

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Message-ID: <ec4a9fbbff184e40d50e1f12e6df161ff5119f21.1722544445.git.christophe.jaillet@wanadoo.fr>
Date: Thu,  1 Aug 2024 22:34:39 +0200
From: Christophe JAILLET <christophe.jaillet@...adoo.fr>
To: Helge Deller <deller@....de>
Cc: linux-kernel@...r.kernel.org,
	kernel-janitors@...r.kernel.org,
	Christophe JAILLET <christophe.jaillet@...adoo.fr>,
	linux-fbdev@...r.kernel.org,
	dri-devel@...ts.freedesktop.org
Subject: [PATCH v2] fbdev/hpfb: Fix an error handling path in hpfb_dio_probe()

If an error occurs after request_mem_region(), a corresponding
release_mem_region() should be called, as already done in the remove
function.

Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2")
Signed-off-by: Christophe JAILLET <christophe.jaillet@...adoo.fr>
---
*Not* even compile tested only.
It is provided as-is

Changes in v2:
  - Apply a minimal change   [Helge Deller]

v1: https://lore.kernel.org/all/dc4fe3d857849ac63131c5620f1bacf1a3d7172e.1722191367.git.christophe.jaillet@wanadoo.fr/
---
 drivers/video/fbdev/hpfb.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/video/fbdev/hpfb.c b/drivers/video/fbdev/hpfb.c
index 66fac8e5393e..a1144b150982 100644
--- a/drivers/video/fbdev/hpfb.c
+++ b/drivers/video/fbdev/hpfb.c
@@ -345,6 +345,7 @@ static int hpfb_dio_probe(struct dio_dev *d, const struct dio_device_id *ent)
 	if (hpfb_init_one(paddr, vaddr)) {
 		if (d->scode >= DIOII_SCBASE)
 			iounmap((void *)vaddr);
+		release_mem_region(d->resource.start, resource_size(&d->resource));
 		return -ENOMEM;
 	}
 	return 0;
-- 
2.45.2