linux-kernel - [PATCH 4.19 067/170] mtd: rawnand: omap2: Pass the parent of pdev to dma_request

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Date:   Mon,  7 Jan 2019 13:31:34 +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,
        Alexander Sverdlin <alexander.sverdlin@...il.com>,
        Boris Brezillon <boris.brezillon@...tlin.com>,
        Miquel Raynal <miquel.raynal@...tlin.com>
Subject: [PATCH 4.19 067/170] mtd: rawnand: omap2: Pass the parent of pdev to dma_request_chan()

4.19-stable review patch.  If anyone has any objections, please let me know.

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

From: Boris Brezillon <boris.brezillon@...tlin.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@...il.com>
Cc: <stable@...r.kernel.org>
Signed-off-by: Boris Brezillon <boris.brezillon@...tlin.com>
Tested-by: Alexander Sverdlin <alexander.sverdlin@...il.com>
Signed-off-by: Miquel Raynal <miquel.raynal@...tlin.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.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
@@ -1938,7 +1938,7 @@ 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");