x86: fix dma_mapping_error for 32bit x86

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Devices like b44 ethernet can't dma from addresses above 1GB. The driver
handles this cases by falling back to GFP_DMA allocation. But for detecting
the problem it needs to get an indication from dma_mapping_error.
The bug is triggered by using a VMSPLIT option of 2G/2G.

Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Acked-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

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Thomas Bogendoerfer 2008-11-29 13:46:27 +01:00 • committed by Ingo Molnar

parent b627c8b17c

commit 7b1dedca42

1 changed files with 2 additions and 4 deletions

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6

arch/x86/include/asm/dma-mapping.h

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