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authorSonic Zhang <sonic.zhang@analog.com>2009-05-18 10:01:16 +0000
committerMike Frysinger <vapier@gentoo.org>2010-10-18 02:49:28 -0400
commit60d0071b609ecb0aebe12aaedf34fe552da12c5b (patch)
tree59555a6112567fc794f290c72ddfcb0791e3fdaf /drivers/spi
parentac01e97d644da8e947ffa1bde5083290fe2e36e7 (diff)
downloadop-kernel-dev-60d0071b609ecb0aebe12aaedf34fe552da12c5b.zip
op-kernel-dev-60d0071b609ecb0aebe12aaedf34fe552da12c5b.tar.gz
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>
Diffstat (limited to 'drivers/spi')
-rw-r--r--drivers/spi/spi_bfin5xx.c4
1 files changed, 0 insertions, 4 deletions
diff --git a/drivers/spi/spi_bfin5xx.c b/drivers/spi/spi_bfin5xx.c
index 4f20b92..61c2ebf 100644
--- 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
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