spi/bfin_spi: work around anomaly 05000119

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>

diff --git a/drivers/spi/spi_bfin5xx.c b/drivers/spi/spi_bfin5xx.c
index 4f20b92..61c2ebf 100644 (file)
--- a/drivers/spi/spi_bfin5xx.c
+++ b/drivers/spi/spi_bfin5xx.c
@@ -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