* [PATCH v2] nand: ranw: qcom_nand: stop using phys_to_dma()
@ 2018-07-17 20:27 Arnd Bergmann
2018-07-17 20:33 ` Boris Brezillon
0 siblings, 1 reply; 3+ messages in thread
From: Arnd Bergmann @ 2018-07-17 20:27 UTC (permalink / raw)
To: Boris Brezillon, Miquel Raynal, David Woodhouse, Brian Norris,
Marek Vasut, Richard Weinberger
Cc: Arnd Bergmann, Abhishek Sahu, Archit Taneja, Masahiro Yamada,
linux-mtd, linux-kernel
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@arndb.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
^ permalink raw reply related [flat|nested] 3+ messages in thread
* Re: [PATCH v2] nand: ranw: qcom_nand: stop using phys_to_dma()
2018-07-17 20:27 [PATCH v2] nand: ranw: qcom_nand: stop using phys_to_dma() Arnd Bergmann
@ 2018-07-17 20:33 ` Boris Brezillon
2018-07-18 7:47 ` Miquel Raynal
0 siblings, 1 reply; 3+ messages in thread
From: Boris Brezillon @ 2018-07-17 20:33 UTC (permalink / raw)
To: Arnd Bergmann
Cc: Miquel Raynal, David Woodhouse, Brian Norris, Marek Vasut,
Richard Weinberger, Abhishek Sahu, Archit Taneja,
Masahiro Yamada, linux-mtd, linux-kernel
On Tue, 17 Jul 2018 22:27:42 +0200
Arnd Bergmann <arnd@arndb.de> wrote:
> 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@arndb.de>
Reviewed-by: Boris Brezillon <boris.brezillon@bootlin.com>
Miquel, can you fix the subject prefix when applying?
Thanks,
Boris
> ---
> 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;
> }
>
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: [PATCH v2] nand: ranw: qcom_nand: stop using phys_to_dma()
2018-07-17 20:33 ` Boris Brezillon
@ 2018-07-18 7:47 ` Miquel Raynal
0 siblings, 0 replies; 3+ messages in thread
From: Miquel Raynal @ 2018-07-18 7:47 UTC (permalink / raw)
To: Boris Brezillon
Cc: Arnd Bergmann, David Woodhouse, Brian Norris, Marek Vasut,
Richard Weinberger, Abhishek Sahu, Archit Taneja,
Masahiro Yamada, linux-mtd, linux-kernel
Hi Boris,
Boris Brezillon <boris.brezillon@bootlin.com> wrote on Tue, 17 Jul 2018
22:33:59 +0200:
> On Tue, 17 Jul 2018 22:27:42 +0200
> Arnd Bergmann <arnd@arndb.de> wrote:
>
> > 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@arndb.de>
>
> Reviewed-by: Boris Brezillon <boris.brezillon@bootlin.com>
>
> Miquel, can you fix the subject prefix when applying?
Applied to nand/next with the subject prefix being:
"mtd: rawnand: qcom:"
Thanks
Miquèl
^ permalink raw reply [flat|nested] 3+ messages in thread
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2018-07-17 20:33 ` Boris Brezillon
2018-07-18 7:47 ` Miquel Raynal
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