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Ip=[149.199.60.83]; Helo=[xsj-pvapsmtpgw01] X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: CY4PR02MB3384 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20171206_213943_567606_1D354712 X-CRM114-Status: GOOD ( 11.17 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: dmaengine@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP 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 --- 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; }