linux-kernel - [PATCH 5.15 676/846] spi: uniphier: Fix a bug that doesnt point to private data correctly

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Date:   Mon, 24 Jan 2022 19:43:13 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org,
        Kunihiko Hayashi <hayashi.kunihiko@...ionext.com>,
        Mark Brown <broonie@...nel.org>
Subject: [PATCH 5.15 676/846] spi: uniphier: Fix a bug that doesnt point to private data correctly

From: Kunihiko Hayashi <hayashi.kunihiko@...ionext.com>

commit 80bb73a9fbcde4ecc55e12f10c73fabbe68a24d1 upstream.

In uniphier_spi_remove(), there is a wrong code to get private data from
the platform device, so the driver can't be removed properly.

The driver should get spi_master from the platform device and retrieve
the private data from it.

Cc: <stable@...r.kernel.org>
Fixes: 5ba155a4d4cc ("spi: add SPI controller driver for UniPhier SoC")
Signed-off-by: Kunihiko Hayashi <hayashi.kunihiko@...ionext.com>
Link: https://lore.kernel.org/r/1640148492-32178-1-git-send-email-hayashi.kunihiko@socionext.com
Signed-off-by: Mark Brown <broonie@...nel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 drivers/spi/spi-uniphier.c |   11 ++++++-----
 1 file changed, 6 insertions(+), 5 deletions(-)

--- a/drivers/spi/spi-uniphier.c
+++ b/drivers/spi/spi-uniphier.c
@@ -767,12 +767,13 @@ out_master_put:
 
 static int uniphier_spi_remove(struct platform_device *pdev)
 {
-	struct uniphier_spi_priv *priv = platform_get_drvdata(pdev);
+	struct spi_master *master = platform_get_drvdata(pdev);
+	struct uniphier_spi_priv *priv = spi_master_get_devdata(master);
 
-	if (priv->master->dma_tx)
-		dma_release_channel(priv->master->dma_tx);
-	if (priv->master->dma_rx)
-		dma_release_channel(priv->master->dma_rx);
+	if (master->dma_tx)
+		dma_release_channel(master->dma_tx);
+	if (master->dma_rx)
+		dma_release_channel(master->dma_rx);
 
 	clk_disable_unprepare(priv->clk);