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Groups > linux.kernel > #1219924
| From | Tan Xiaojun <tanxiaojun@huawei.com> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | [PATCH] CMA: fix CONFIG_CMA_SIZE_MBYTES overflow in 64bit |
| Date | 2015-09-07 06:30 +0200 |
| Message-ID | <q5We5-3dX-9@gated-at.bofh.it> (permalink) |
| Organization | linux.* mail to news gateway |
In 64bit system, if you set CONFIG_CMA_SIZE_MBYTES>=2048, it will overflow and size_bytes will be a big wrong number. Set CONFIG_CMA_SIZE_MBYTES=2048 and you will get an info below during system boot: ********* cma: Failed to reserve 17592186042368 MiB ********* Signed-off-by: Tan Xiaojun <tanxiaojun@huawei.com> --- drivers/base/dma-contiguous.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/base/dma-contiguous.c b/drivers/base/dma-contiguous.c index 950fff9..426ba27 100644 --- a/drivers/base/dma-contiguous.c +++ b/drivers/base/dma-contiguous.c @@ -46,7 +46,7 @@ struct cma *dma_contiguous_default_area; * Users, who want to set the size of global CMA area for their system * should use cma= kernel parameter. */ -static const phys_addr_t size_bytes = CMA_SIZE_MBYTES * SZ_1M; +static const phys_addr_t size_bytes = (phys_addr_t)CMA_SIZE_MBYTES * SZ_1M; static phys_addr_t size_cmdline = -1; static phys_addr_t base_cmdline; static phys_addr_t limit_cmdline; -- 1.7.9.5 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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[PATCH] CMA: fix CONFIG_CMA_SIZE_MBYTES overflow in 64bit Tan Xiaojun <tanxiaojun@huawei.com> - 2015-09-07 06:30 +0200 Re: [PATCH] CMA: fix CONFIG_CMA_SIZE_MBYTES overflow in 64bit Tan Xiaojun <tanxiaojun@huawei.com> - 2015-09-14 04:30 +0200
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