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Date: Thu, 17 Sep 2009 19:47:50 -0400 From: Mike Frysinger <vapier@...too.org> To: spi-devel-general@...ts.sourceforge.net, David Brownell <dbrownell@...rs.sourceforge.net> Cc: linux-kernel@...r.kernel.org, uclinux-dist-devel@...ckfin.uclinux.org, Sonic Zhang <sonic.zhang@...log.com> Subject: [PATCH 2/5] Blackfin SPI: work around anomaly 05000119 From: Sonic Zhang <sonic.zhang@...log.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@...log.com> Signed-off-by: Mike Frysinger <vapier@...too.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 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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