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spi: bcm2835: fix overflow in calculation of transfer time
authorMartin Sperl <kernel@martin.sperl.org>
Wed, 29 Jul 2015 07:34:10 +0000 (07:34 +0000)
committerMark Brown <broonie@kernel.org>
Wed, 29 Jul 2015 14:01:57 +0000 (15:01 +0100)
This resulted in the use of polling mode when other approaches
(dma or interrupts) would have been more appropriate.

Happened for transfers longer than 477 bytes.

Reported-by: Noralf Tronnes <noralf@tronnes.org>
Signed-off-by: Martin Sperl <kernel@martin.sperl.org>
Signed-off-by: Mark Brown <broonie@kernel.org>

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