linux-kernel - [PATCH] drm/stm: dsi: stm mipi dsi doesn't print error on probe deferral

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Message-ID: <1579602245-7577-1-git-send-email-yannick.fertre@st.com>
Date:   Tue, 21 Jan 2020 11:24:05 +0100
From:   Yannick Fertre <yannick.fertre@...com>
To:     Yannick Fertre <yannick.fertre@...com>,
        Philippe Cornu <philippe.cornu@...com>,
        Benjamin Gaignard <benjamin.gaignard@...com>,
        David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>,
        Maxime Coquelin <mcoquelin.stm32@...il.com>,
        Alexandre Torgue <alexandre.torgue@...com>,
        <dri-devel@...ts.freedesktop.org>,
        <linux-stm32@...md-mailman.stormreply.com>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>
Subject: [PATCH] drm/stm: dsi: stm mipi dsi doesn't print error on probe deferral

From: Etienne Carriere <etienne.carriere@...com>

Change DSI driver to not print an error trace when probe
is deferred for a clock resource.

Signed-off-by: Etienne Carriere <etienne.carriere@...com>
---
 drivers/gpu/drm/stm/dw_mipi_dsi-stm.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/stm/dw_mipi_dsi-stm.c b/drivers/gpu/drm/stm/dw_mipi_dsi-stm.c
index 4b16563..2e1f266 100644
--- a/drivers/gpu/drm/stm/dw_mipi_dsi-stm.c
+++ b/drivers/gpu/drm/stm/dw_mipi_dsi-stm.c
@@ -377,7 +377,9 @@ static int dw_mipi_dsi_stm_probe(struct platform_device *pdev)
 	dsi->pllref_clk = devm_clk_get(dev, "ref");
 	if (IS_ERR(dsi->pllref_clk)) {
 		ret = PTR_ERR(dsi->pllref_clk);
-		DRM_ERROR("Unable to get pll reference clock: %d\n", ret);
+		if (ret != -EPROBE_DEFER)
+			DRM_ERROR("Unable to get pll reference clock: %d\n",
+				  ret);
 		goto err_clk_get;
 	}
 
-- 
2.7.4