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spi/bfin_spi: work around anomaly 05000119

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Anomaly 05000119 states that the DMA_RUN bit with peripherals isn't
reliable.  However, the way the driver is currently written (DMA IRQ
callback), we don't need the polling in the first place, so drop it.

Signed-off-by: Sonic Zhang <sonic.zhang@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
This commit is contained in:
Sonic Zhang 2009-05-18 10:01:16 +00:00 committed by Mike Frysinger
parent ac01e97d64
commit 60d0071b60
1 changed files with 0 additions and 4 deletions
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4
drivers/spi/spi_bfin5xx.c
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@ -540,10 +540,6 @@ static irqreturn_t bfin_spi_dma_irq_handler(int irq, void *dev_id)
clear_dma_irqstat(drv_data->dma_channel);
/* Wait for DMA to complete */
while (get_dma_curr_irqstat(drv_data->dma_channel) & DMA_RUN)
cpu_relax();
/*
* wait for the last transaction shifted out. HRM states:
* at this point there may still be data in the SPI DMA FIFO waiting