linux-kernel - [PATCH 14/33] staging/olpc: lock_fb

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Date:   Tue, 28 May 2019 11:02:45 +0200
From:   Daniel Vetter <daniel.vetter@...ll.ch>
To:     LKML <linux-kernel@...r.kernel.org>
Cc:     DRI Development <dri-devel@...ts.freedesktop.org>,
        Intel Graphics Development <intel-gfx@...ts.freedesktop.org>,
        linux-fbdev@...r.kernel.org,
        Daniel Thompson <daniel.thompson@...aro.org>,
        Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>,
        Daniel Vetter <daniel.vetter@...ll.ch>,
        Sam Ravnborg <sam@...nborg.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
        Jens Frederich <jfrederich@...il.com>,
        Daniel Drake <dsd@...top.org>,
        Jon Nettleton <jon.nettleton@...il.com>
Subject: [PATCH 14/33] staging/olpc: lock_fb_info can't fail

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@...ll.ch>
Reviewed-by: Sam Ravnborg <sam@...nborg.org>
Acked-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Reviewed-by: Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc: Jens Frederich <jfrederich@...il.com>
Cc: Daniel Drake <dsd@...top.org>
Cc: Jon Nettleton <jon.nettleton@...il.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