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Commit 60d0071b authored by Sonic Zhang's avatar Sonic Zhang Committed by Mike Frysinger
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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: default avatarSonic Zhang <sonic.zhang@analog.com>
Signed-off-by: default avatarMike Frysinger <vapier@gentoo.org>
parent ac01e97d

drivers/spi/spi_bfin5xx.c

+0 −4
Original line number Diff line number Diff line
@@ -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