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From:   Daniel Vetter <daniel.vetter@ffwll.ch>
To:     LKML <linux-kernel@vger.kernel.org>
Cc:     DRI Development <dri-devel@lists.freedesktop.org>,
        Intel Graphics Development <intel-gfx@lists.freedesktop.org>,
        linux-fbdev@vger.kernel.org,
        Daniel Thompson <daniel.thompson@linaro.org>,
        Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>,
        Daniel Vetter <daniel.vetter@ffwll.ch>,
        Sam Ravnborg <sam@ravnborg.org>,
        Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        Maarten Lankhorst <maarten.lankhorst@linux.intel.com>,
        Jens Frederich <jfrederich@gmail.com>,
        Daniel Drake <dsd@laptop.org>,
        Jon Nettleton <jon.nettleton@gmail.com>
Subject: [PATCH 14/33] staging/olpc: lock_fb_info can't fail
Date:   Tue, 28 May 2019 11:02:45 +0200
Message-Id: <20190528090304.9388-15-daniel.vetter@ffwll.ch>
In-Reply-To: <20190528090304.9388-1-daniel.vetter@ffwll.ch>
References: <20190528090304.9388-1-daniel.vetter@ffwll.ch>
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Sender: linux-kernel-owner@vger.kernel.org
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Simply because olpc never unregisters the damn thing. It also
registers the framebuffer directly by poking around in fbdev
core internals, so it's all around rather broken.

Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Jens Frederich <jfrederich@gmail.com>
Cc: Daniel Drake <dsd@laptop.org>
Cc: Jon Nettleton <jon.nettleton@gmail.com>
---
 drivers/staging/olpc_dcon/olpc_dcon.c | 6 +-----
 1 file changed, 1 insertion(+), 5 deletions(-)

diff --git a/drivers/staging/olpc_dcon/olpc_dcon.c b/drivers/staging/olpc_dcon/olpc_dcon.c
index 6b714f740ac3..a254238be181 100644
--- a/drivers/staging/olpc_dcon/olpc_dcon.c
+++ b/drivers/staging/olpc_dcon/olpc_dcon.c
@@ -250,11 +250,7 @@ static bool dcon_blank_fb(struct dcon_priv *dcon, bool blank)
 	int err;
 
 	console_lock();
-	if (!lock_fb_info(dcon->fbinfo)) {
-		console_unlock();
-		dev_err(&dcon->client->dev, "unable to lock framebuffer\n");
-		return false;
-	}
+	lock_fb_info(dcon->fbinfo);
 
 	dcon->ignore_fb_events = true;
 	err = fb_blank(dcon->fbinfo,
-- 
2.20.1