This patch fixes the below issues. --> Need to clear the channel data count register when overflow interrupts occurs. --> Reduce the log level from _info to _dbg when overflow interrupt occurs.
Signed-off-by: Kedareswara rao Appana <[email protected]> --- Changes for v2: --> None. drivers/dma/xilinx/zynqmp_dma.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/drivers/dma/xilinx/zynqmp_dma.c b/drivers/dma/xilinx/zynqmp_dma.c index b9b5c0a..a297a26 100644 --- a/drivers/dma/xilinx/zynqmp_dma.c +++ b/drivers/dma/xilinx/zynqmp_dma.c @@ -48,6 +48,7 @@ #define ZYNQMP_DMA_SRC_START_MSB 0x15C #define ZYNQMP_DMA_DST_START_LSB 0x160 #define ZYNQMP_DMA_DST_START_MSB 0x164 +#define ZYNQMP_DMA_TOTAL_BYTE 0x188 #define ZYNQMP_DMA_RATE_CTRL 0x18C #define ZYNQMP_DMA_IRQ_SRC_ACCT 0x190 #define ZYNQMP_DMA_IRQ_DST_ACCT 0x194 @@ -513,6 +514,7 @@ static int zynqmp_dma_alloc_chan_resources(struct dma_chan *dchan) static void zynqmp_dma_start(struct zynqmp_dma_chan *chan) { writel(ZYNQMP_DMA_INT_EN_DEFAULT_MASK, chan->regs + ZYNQMP_DMA_IER); + writel(0, chan->regs + ZYNQMP_DMA_TOTAL_BYTE); chan->idle = false; writel(ZYNQMP_DMA_ENABLE, chan->regs + ZYNQMP_DMA_CTRL2); } @@ -524,6 +526,8 @@ static void zynqmp_dma_start(struct zynqmp_dma_chan *chan) */ static void zynqmp_dma_handle_ovfl_int(struct zynqmp_dma_chan *chan, u32 status) { + if (status & ZYNQMP_DMA_BYTE_CNT_OVRFL) + writel(0, chan->regs + ZYNQMP_DMA_TOTAL_BYTE); if (status & ZYNQMP_DMA_IRQ_DST_ACCT_ERR) readl(chan->regs + ZYNQMP_DMA_IRQ_DST_ACCT); if (status & ZYNQMP_DMA_IRQ_SRC_ACCT_ERR) @@ -724,7 +728,7 @@ static irqreturn_t zynqmp_dma_irq_handler(int irq, void *data) if (status & ZYNQMP_DMA_INT_OVRFL) { zynqmp_dma_handle_ovfl_int(chan, status); - dev_info(chan->dev, "Channel %p overflow interrupt\n", chan); + dev_dbg(chan->dev, "Channel %p overflow interrupt\n", chan); ret = IRQ_HANDLED; } -- 2.7.4
