diff options
Diffstat (limited to 'drivers/spi/spi_bfin5xx.c')
| -rw-r--r-- | drivers/spi/spi_bfin5xx.c | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/drivers/spi/spi_bfin5xx.c b/drivers/spi/spi_bfin5xx.c index 88dee87fc420..e706de1d10c8 100644 --- a/drivers/spi/spi_bfin5xx.c +++ b/drivers/spi/spi_bfin5xx.c @@ -557,6 +557,7 @@ static irqreturn_t dma_irq_handler(int irq, void *dev_id) struct driver_data *drv_data = dev_id; struct chip_data *chip = drv_data->cur_chip; struct spi_message *msg = drv_data->cur_msg; + unsigned long timeout; unsigned short dmastat = get_dma_curr_irqstat(drv_data->dma_channel); u16 spistat = read_STAT(drv_data); @@ -582,8 +583,17 @@ static irqreturn_t dma_irq_handler(int irq, void *dev_id) cpu_relax(); } + dev_dbg(&drv_data->pdev->dev, + "in dma_irq_handler dmastat:0x%x spistat:0x%x\n", + dmastat, read_STAT(drv_data)); + + timeout = jiffies + HZ; while (!(read_STAT(drv_data) & SPIF)) - cpu_relax(); + if (!time_before(jiffies, timeout)) { + dev_warn(&drv_data->pdev->dev, "timeout waiting for SPIF"); + break; + } else + cpu_relax(); if ((dmastat & DMA_ERR) && (spistat & RBSY)) { msg->state = ERROR_STATE; |