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Message-Id: <1233904388-5765-15-git-send-email-cooloney@kernel.org> Date: Fri, 6 Feb 2009 15:13:02 +0800 From: Bryan Wu <cooloney@...nel.org> To: dbrownell@...rs.sourceforge.net, akpm@...ux-foundation.org Cc: spi-devel-general@...ts.sourceforge.net, linux-kernel@...r.kernel.org, Mike Frysinger <vapier.adi@...il.com>, Bryan Wu <cooloney@...nel.org> Subject: [PATCH 14/20] Blackfin SPI Driver: tweak magic spi dma sequence to get it working on BF54x From: Mike Frysinger <vapier.adi@...il.com> Without this changes, SPI DMA is not reliably under stress tests. Obiviously it's a hardware issue which is not addressed by any document. Signed-off-by: Mike Frysinger <vapier.adi@...il.com> Signed-off-by: Bryan Wu <cooloney@...nel.org> --- drivers/spi/spi_bfin5xx.c | 3 ++- 1 files changed, 2 insertions(+), 1 deletions(-) diff --git a/drivers/spi/spi_bfin5xx.c b/drivers/spi/spi_bfin5xx.c index 748e98f..d8c4be1 100644 --- a/drivers/spi/spi_bfin5xx.c +++ b/drivers/spi/spi_bfin5xx.c @@ -862,8 +862,9 @@ static void pump_transfers(unsigned long data) set_dma_start_addr(drv_data->dma_channel, dma_start_addr); set_dma_config(drv_data->dma_channel, dma_config); local_irq_save(flags); - enable_dma(drv_data->dma_channel); + SSYNC(); write_CTRL(drv_data, cr); + enable_dma(drv_data->dma_channel); dma_enable_irq(drv_data->dma_channel); local_irq_restore(flags); -- 1.5.6.3 -- 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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