Messages in this thread Patch in this message |  | | | From | Mike Frysinger <> | | Subject | [PATCH 2/5] Blackfin SPI: work around anomaly 05000119 | | Date | Thu, 17 Sep 2009 19:47:50 -0400 |
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From: Sonic Zhang <sonic.zhang@analog.com>
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> --- drivers/spi/spi_bfin5xx.c | 4 ---- 1 files changed, 0 insertions(+), 4 deletions(-) diff --git a/drivers/spi/spi_bfin5xx.c b/drivers/spi/spi_bfin5xx.c index 8ec4969..5591bce 100644 --- a/drivers/spi/spi_bfin5xx.c +++ b/drivers/spi/spi_bfin5xx.c @@ -539,10 +539,6 @@ 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 -- 1.6.5.rc1
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