OMAP2/3/4: DMA: disable channel interrupts in omap_init_dma()

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If we are softbooting another kernel using kexec, DMA controller state is not
known when we are performing omap_init_dma(). It is possible that some DMA
channels are already active. For example after kexec we get:

<4>IRQ 0020 for non-allocated DMAchannel 5
<4>IRQ 0020 for non-allocated DMAchannel 5
<4>IRQ 0020 for non-allocated DMAchannel 5
<4>IRQ 0020 for non-allocated DMAchannel 5
<4>IRQ 0020 for non-allocated DMAchannel 5

To prevent any weird things happening, we disable all channel interrupts during
init.

Signed-off-by: Mika Westerberg <ext-mika.1.westerberg@nokia.com>
Acked-by: Kevin Hilman <khilman@deeprootsystems.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>

...

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Mika Westerberg 2010-05-14 12:05:25 -07:00 • committed by Tony Lindgren

parent ad57c39482

commit ada8d4a5e2

1 changed files with 19 additions and 8 deletions

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arch/arm/plat-omap/dma.c

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