linux-kernel - [PATCH v2 05/11] drm/tidss: Return error value from from softreset

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20231109-tidss-probe-v2-5-ac91b5ea35c0@ideasonboard.com>
Date:   Thu, 09 Nov 2023 09:37:58 +0200
From:   Tomi Valkeinen <tomi.valkeinen@...asonboard.com>
To:     Aradhya Bhatia <a-bhatia1@...com>,
        Devarsh Thakkar <devarsht@...com>,
        Jyri Sarha <jyri.sarha@....fi>,
        Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
        Maxime Ripard <mripard@...nel.org>,
        Thomas Zimmermann <tzimmermann@...e.de>,
        David Airlie <airlied@...il.com>,
        Daniel Vetter <daniel@...ll.ch>
Cc:     dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org,
        Laurent Pinchart <laurent.pinchart@...asonboard.com>,
        Francesco Dolcini <francesco@...cini.it>,
        Tomi Valkeinen <tomi.valkeinen@...asonboard.com>
Subject: [PATCH v2 05/11] drm/tidss: Return error value from from softreset

Return an error value from dispc_softreset() so that the caller can
handle the errors.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@...asonboard.com>
---
 drivers/gpu/drm/tidss/tidss_dispc.c | 17 ++++++++++++-----
 1 file changed, 12 insertions(+), 5 deletions(-)

diff --git a/drivers/gpu/drm/tidss/tidss_dispc.c b/drivers/gpu/drm/tidss/tidss_dispc.c
index deb665d0ede8..50b475b285d9 100644
--- a/drivers/gpu/drm/tidss/tidss_dispc.c
+++ b/drivers/gpu/drm/tidss/tidss_dispc.c
@@ -2702,7 +2702,7 @@ static void dispc_init_errata(struct dispc_device *dispc)
 	}
 }
 
-static void dispc_softreset(struct dispc_device *dispc)
+static int dispc_softreset(struct dispc_device *dispc)
 {
 	u32 val;
 	int ret;
@@ -2712,8 +2712,12 @@ static void dispc_softreset(struct dispc_device *dispc)
 	/* Wait for reset to complete */
 	ret = readl_poll_timeout(dispc->base_common + DSS_SYSSTATUS,
 				 val, val & 1, 100, 5000);
-	if (ret)
-		dev_warn(dispc->dev, "failed to reset dispc\n");
+	if (ret) {
+		dev_err(dispc->dev, "failed to reset dispc\n");
+		return ret;
+	}
+
+	return 0;
 }
 
 int dispc_init(struct tidss_device *tidss)
@@ -2826,8 +2830,11 @@ int dispc_init(struct tidss_device *tidss)
 			     &dispc->memory_bandwidth_limit);
 
 	/* K2G display controller does not support soft reset */
-	if (feat->subrev != DISPC_K2G)
-		dispc_softreset(dispc);
+	if (feat->subrev != DISPC_K2G) {
+		r = dispc_softreset(dispc);
+		if (r)
+			return r;
+	}
 
 	tidss->dispc = dispc;
 

-- 
2.34.1