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From:   Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To:     linux-kernel@vger.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        stable@vger.kernel.org,
        Alexander Sverdlin <alexander.sverdlin@gmail.com>,
        Boris Brezillon <boris.brezillon@bootlin.com>,
        Miquel Raynal <miquel.raynal@bootlin.com>
Subject: [PATCH 4.20 029/145] mtd: rawnand: omap2: Pass the parent of pdev to dma_request_chan()
Date:   Mon,  7 Jan 2019 13:31:06 +0100
Message-Id: <20190107104441.115077343@linuxfoundation.org>
In-Reply-To: <20190107104437.308206189@linuxfoundation.org>
References: <20190107104437.308206189@linuxfoundation.org>
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4.20-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Boris Brezillon <boris.brezillon@bootlin.com>

commit 9b432630e0150b777c423fdef6a7b8d17dfa70b6 upstream.

Commit e1e6255c311b ("mtd: rawnand: omap2: convert driver to
nand_scan()") moved part of the init code in the ->attach_chip hook
and at the same time changed the struct device object passed to
dma_request_chan() (&pdev->dev instead of pdev->dev.parent).

Fixes: e1e6255c311b ("mtd: rawnand: omap2: convert driver to nand_scan()")
Reported-by: Alexander Sverdlin <alexander.sverdlin@gmail.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Boris Brezillon <boris.brezillon@bootlin.com>
Tested-by: Alexander Sverdlin <alexander.sverdlin@gmail.com>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/mtd/nand/raw/omap2.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/mtd/nand/raw/omap2.c
+++ b/drivers/mtd/nand/raw/omap2.c
@@ -1944,7 +1944,7 @@ static int omap_nand_attach_chip(struct
 	case NAND_OMAP_PREFETCH_DMA:
 		dma_cap_zero(mask);
 		dma_cap_set(DMA_SLAVE, mask);
-		info->dma = dma_request_chan(dev, "rxtx");
+		info->dma = dma_request_chan(dev->parent, "rxtx");
 
 		if (IS_ERR(info->dma)) {
 			dev_err(dev, "DMA engine request failed\n");