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Message-Id: <20180717202759.2288076-1-arnd@arndb.de>
Date: Tue, 17 Jul 2018 22:27:42 +0200
From: Arnd Bergmann <arnd@...db.de>
To: Boris Brezillon <boris.brezillon@...tlin.com>,
Miquel Raynal <miquel.raynal@...tlin.com>,
David Woodhouse <dwmw2@...radead.org>,
Brian Norris <computersforpeace@...il.com>,
Marek Vasut <marek.vasut@...il.com>,
Richard Weinberger <richard@....at>
Cc: Arnd Bergmann <arnd@...db.de>,
Abhishek Sahu <absahu@...eaurora.org>,
Archit Taneja <architt@...eaurora.org>,
Masahiro Yamada <yamada.masahiro@...ionext.com>,
linux-mtd@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: [PATCH v2] nand: ranw: qcom_nand: stop using phys_to_dma()
Compile-testing this driver on x86 caused a link error:
ERROR: "__phys_to_dma" [drivers/mtd/nand/raw/qcom_nandc.ko] undefined!
The problem here is that the driver attempts to convert the physical
address into the DMA controller as a dma_addr_t and calls phys_to_dma()
to do the conversion.
The correct way to do the conversion is using the dma mapping interfaces.
Fixes: c76b78d8ec05 ("mtd: nand: Qualcomm NAND controller driver")
Signed-off-by: Arnd Bergmann <arnd@...db.de>
---
drivers/mtd/nand/raw/qcom_nandc.c | 30 +++++++++++++++++++++---------
1 file changed, 21 insertions(+), 9 deletions(-)
diff --git a/drivers/mtd/nand/raw/qcom_nandc.c b/drivers/mtd/nand/raw/qcom_nandc.c
index 994f980c6d86..645630953f38 100644
--- a/drivers/mtd/nand/raw/qcom_nandc.c
+++ b/drivers/mtd/nand/raw/qcom_nandc.c
@@ -2957,14 +2957,6 @@ static int qcom_nandc_probe(struct platform_device *pdev)
nandc->props = dev_data;
- res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- nandc->base = devm_ioremap_resource(dev, res);
- if (IS_ERR(nandc->base))
- return PTR_ERR(nandc->base);
-
- nandc->base_phys = res->start;
- nandc->base_dma = phys_to_dma(dev, (phys_addr_t)res->start);
-
nandc->core_clk = devm_clk_get(dev, "core");
if (IS_ERR(nandc->core_clk))
return PTR_ERR(nandc->core_clk);
@@ -2977,9 +2969,21 @@ static int qcom_nandc_probe(struct platform_device *pdev)
if (ret)
return ret;
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ nandc->base = devm_ioremap_resource(dev, res);
+ if (IS_ERR(nandc->base))
+ return PTR_ERR(nandc->base);
+
+ nandc->base_phys = res->start;
+ nandc->base_dma = dma_map_resource(dev, res->start,
+ resource_size(res),
+ DMA_BIDIRECTIONAL, 0);
+ if (!nandc->base_dma)
+ return -ENXIO;
+
ret = qcom_nandc_alloc(nandc);
if (ret)
- goto err_core_clk;
+ goto err_nandc_alloc;
ret = clk_prepare_enable(nandc->core_clk);
if (ret)
@@ -3005,6 +3009,9 @@ static int qcom_nandc_probe(struct platform_device *pdev)
clk_disable_unprepare(nandc->core_clk);
err_core_clk:
qcom_nandc_unalloc(nandc);
+err_nandc_alloc:
+ dma_unmap_resource(dev, res->start, resource_size(res),
+ DMA_BIDIRECTIONAL, 0);
return ret;
}
@@ -3012,16 +3019,21 @@ static int qcom_nandc_probe(struct platform_device *pdev)
static int qcom_nandc_remove(struct platform_device *pdev)
{
struct qcom_nand_controller *nandc = platform_get_drvdata(pdev);
+ struct resource *res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
struct qcom_nand_host *host;
list_for_each_entry(host, &nandc->host_list, node)
nand_release(nand_to_mtd(&host->chip));
+
qcom_nandc_unalloc(nandc);
clk_disable_unprepare(nandc->aon_clk);
clk_disable_unprepare(nandc->core_clk);
+ dma_unmap_resource(&pdev->dev, nandc->base_dma, resource_size(res),
+ DMA_BIDIRECTIONAL, 0);
+
return 0;
}
--
2.9.0
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