linux-kernel - [PATCH 5.16 0151/1039] drm/vboxvideo: fix a NULL vs IS

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Message-Id: <20220124184130.236313729@linuxfoundation.org>
Date:   Mon, 24 Jan 2022 19:32:20 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Dan Carpenter <dan.carpenter@...cle.com>,
        Hans de Goede <hdegoede@...hat.com>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.16 0151/1039] drm/vboxvideo: fix a NULL vs IS_ERR() check

From: Dan Carpenter <dan.carpenter@...cle.com>

[ Upstream commit cebbb5c46d0cb0615fd0c62dea9b44273d0a9780 ]

The devm_gen_pool_create() function never returns NULL, it returns
error pointers.

Fixes: 4cc9b565454b ("drm/vboxvideo: Use devm_gen_pool_create")
Signed-off-by: Dan Carpenter <dan.carpenter@...cle.com>
Reviewed-by: Hans de Goede <hdegoede@...hat.com>
Signed-off-by: Hans de Goede <hdegoede@...hat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20211118111233.GA1147@kili
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/gpu/drm/vboxvideo/vbox_main.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/vboxvideo/vbox_main.c b/drivers/gpu/drm/vboxvideo/vbox_main.c
index f28779715ccda..c9e8b3a63c621 100644
--- a/drivers/gpu/drm/vboxvideo/vbox_main.c
+++ b/drivers/gpu/drm/vboxvideo/vbox_main.c
@@ -127,8 +127,8 @@ int vbox_hw_init(struct vbox_private *vbox)
 	/* Create guest-heap mem-pool use 2^4 = 16 byte chunks */
 	vbox->guest_pool = devm_gen_pool_create(vbox->ddev.dev, 4, -1,
 						"vboxvideo-accel");
-	if (!vbox->guest_pool)
-		return -ENOMEM;
+	if (IS_ERR(vbox->guest_pool))
+		return PTR_ERR(vbox->guest_pool);
 
 	ret = gen_pool_add_virt(vbox->guest_pool,
 				(unsigned long)vbox->guest_heap,
-- 
2.34.1