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drm.7971
0168-drm-fsl-dcu-check-for-clk_prepare_enable-e...
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File 0168-drm-fsl-dcu-check-for-clk_prepare_enable-error.patch of Package drm.7971
From 35c309e4c44686df7d0e776a8b095efc1d6d5641 Mon Sep 17 00:00:00 2001 From: Fabio Estevam <fabio.estevam@nxp.com> Date: Sat, 7 Oct 2017 22:36:51 +0000 Subject: [PATCH] drm/fsl-dcu: check for clk_prepare_enable() error [ Upstream commit ef15d36154cc741d7ded4ae4fa0cf7987354e313 ] clk_prepare_enable() may fail, so we should better check its return value. Also place the of_node_put() function right after clk_prepare_enable(), in order to avoid calling of_node_put() twice in case clk_prepare_enable() fails. Signed-off-by: Fabio Estevam <fabio.estevam@nxp.com> Signed-off-by: Stefan Agner <stefan@agner.ch> Signed-off-by: Sasha Levin <alexander.levin@verizon.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> --- drivers/gpu/drm/fsl-dcu/fsl_tcon.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) --- a/drivers/gpu/drm/fsl-dcu/fsl_tcon.c +++ b/drivers/gpu/drm/fsl-dcu/fsl_tcon.c @@ -89,9 +89,13 @@ struct fsl_tcon *fsl_tcon_init(struct de goto err_node_put; } - of_node_put(np); - clk_prepare_enable(tcon->ipg_clk); + ret = clk_prepare_enable(tcon->ipg_clk); + if (ret) { + dev_err(dev, "Couldn't enable the TCON clock\n"); + goto err_node_put; + } + of_node_put(np); dev_info(dev, "Using TCON in bypass mode\n"); return tcon;
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