* [PATCH] dma-mapping: limit dma_mask in arch_setup_dma_ops()
@ 2014-12-24 21:55 Murali Karicheri
2015-01-13 20:38 ` Murali Karicheri
0 siblings, 1 reply; 2+ messages in thread
From: Murali Karicheri @ 2014-12-24 21:55 UTC (permalink / raw)
To: linux-lFZ/pmaqli7XmaaqVzeoHQ,
linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r,
linux-kernel-u79uwXL29TY76Z2rM5mHXA, arnd-r2nGTMty4D4,
will.deacon-5wv7dgnIgG8, grant.likely-QSEj5FYQhm4dnm+yROfE0A,
robh+dt-DgEjT+Ai2ygdnm+yROfE0A, devicetree-u79uwXL29TY76Z2rM5mHXA
Cc: Murali Karicheri
dma_mask should be limited to minimum of the default dma mask
and dma-range size configured in DT for proper operation.
Signed-off-by: Murali Karicheri <m-karicheri2-l0cyMroinI0@public.gmane.org>
Reviewed-by: Arnd Bergmann <arnd-r2nGTMty4D4@public.gmane.org>
---
arch/arm/mm/dma-mapping.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/arch/arm/mm/dma-mapping.c b/arch/arm/mm/dma-mapping.c
index 7864797..5cea1fc 100644
--- a/arch/arm/mm/dma-mapping.c
+++ b/arch/arm/mm/dma-mapping.c
@@ -2053,6 +2053,7 @@ void arch_setup_dma_ops(struct device *dev, u64 dma_base, u64 size,
{
struct dma_map_ops *dma_ops;
+ *dev->dma_mask = min((*dev->dma_mask), (dma_base + size - 1));
dev->archdata.dma_coherent = coherent;
if (arm_setup_iommu_dma_ops(dev, dma_base, size, iommu))
dma_ops = arm_get_iommu_dma_map_ops(coherent);
--
1.7.9.5
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^ permalink raw reply related [flat|nested] 2+ messages in thread* Re: [PATCH] dma-mapping: limit dma_mask in arch_setup_dma_ops()
2014-12-24 21:55 [PATCH] dma-mapping: limit dma_mask in arch_setup_dma_ops() Murali Karicheri
@ 2015-01-13 20:38 ` Murali Karicheri
0 siblings, 0 replies; 2+ messages in thread
From: Murali Karicheri @ 2015-01-13 20:38 UTC (permalink / raw)
To: Murali Karicheri
Cc: linux, linux-arm-kernel, linux-kernel, arnd, will.deacon,
grant.likely, robh+dt, devicetree
On 12/24/2014 04:55 PM, Murali Karicheri wrote:
> dma_mask should be limited to minimum of the default dma mask
> and dma-range size configured in DT for proper operation.
>
> Signed-off-by: Murali Karicheri<m-karicheri2@ti.com>
> Reviewed-by: Arnd Bergmann<arnd@arndb.de>
> ---
> arch/arm/mm/dma-mapping.c | 1 +
> 1 file changed, 1 insertion(+)
>
> diff --git a/arch/arm/mm/dma-mapping.c b/arch/arm/mm/dma-mapping.c
> index 7864797..5cea1fc 100644
> --- a/arch/arm/mm/dma-mapping.c
> +++ b/arch/arm/mm/dma-mapping.c
> @@ -2053,6 +2053,7 @@ void arch_setup_dma_ops(struct device *dev, u64 dma_base, u64 size,
> {
> struct dma_map_ops *dma_ops;
>
> + *dev->dma_mask = min((*dev->dma_mask), (dma_base + size - 1));
> dev->archdata.dma_coherent = coherent;
> if (arm_setup_iommu_dma_ops(dev, dma_base, size, iommu))
> dma_ops = arm_get_iommu_dma_map_ops(coherent);
Please discard this as this is still a work in progress. Any change if
required will be added to my series with subject "PCI: get DMA
configuration from parent device"
Thanks.
--
Murali Karicheri
Linux Kernel, Texas Instruments
^ permalink raw reply [flat|nested] 2+ messages in thread
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