linux-kernel - [PATCH 5.2 037/313] spi: dw-mmio: Clock should be shut when error occurs

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Date:   Thu,  3 Oct 2019 17:50:15 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Phil Edworthy <phil.edworthy@...esas.com>,
        Gareth Williams <gareth.williams.jx@...esas.com>,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        Mark Brown <broonie@...nel.org>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.2 037/313] spi: dw-mmio: Clock should be shut when error occurs

From: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>

[ Upstream commit 3da9834d9381dd99273f2ad4e6d096c9187dc4f2 ]

When optional clock requesting fails, the main clock is still up and running,
we should shut it down in such caee.

Fixes: 560ee7e91009 ("spi: dw: Add support for an optional interface clock")
Cc: Phil Edworthy <phil.edworthy@...esas.com>
Cc: Gareth Williams <gareth.williams.jx@...esas.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Reviewed-by: Gareth Williams <gareth.williams.jx@...esas.com>
Link: https://lore.kernel.org/r/20190710114243.30101-1-andriy.shevchenko@linux.intel.com
Signed-off-by: Mark Brown <broonie@...nel.org>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/spi/spi-dw-mmio.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/spi/spi-dw-mmio.c b/drivers/spi/spi-dw-mmio.c
index 18c06568805e7..86789dbaf5771 100644
--- a/drivers/spi/spi-dw-mmio.c
+++ b/drivers/spi/spi-dw-mmio.c
@@ -172,8 +172,10 @@ static int dw_spi_mmio_probe(struct platform_device *pdev)
 
 	/* Optional clock needed to access the registers */
 	dwsmmio->pclk = devm_clk_get_optional(&pdev->dev, "pclk");
-	if (IS_ERR(dwsmmio->pclk))
-		return PTR_ERR(dwsmmio->pclk);
+	if (IS_ERR(dwsmmio->pclk)) {
+		ret = PTR_ERR(dwsmmio->pclk);
+		goto out_clk;
+	}
 	ret = clk_prepare_enable(dwsmmio->pclk);
 	if (ret)
 		goto out_clk;
-- 
2.20.1