dmaengine: hsu: Export hsu_dma_get_status()
To allow other code to safely read DMA Channel Status Register (where
the register attribute for Channel Error, Descriptor Time Out &
Descriptor Done fields are read-clear), export hsu_dma_get_status().
hsu_dma_irq() is renamed to hsu_dma_do_irq() and requires Status
Register value to be passed in.
Signed-off-by: Chuah, Kim Tatt <kim.tatt.chuah@intel.com>
Acked-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
diff --git a/drivers/dma/hsu/pci.c b/drivers/dma/hsu/pci.c
index e2db76b..9916058 100644
--- a/drivers/dma/hsu/pci.c
+++ b/drivers/dma/hsu/pci.c
@@ -27,13 +27,20 @@
{
struct hsu_dma_chip *chip = dev;
u32 dmaisr;
+ u32 status;
unsigned short i;
irqreturn_t ret = IRQ_NONE;
+ int err;
dmaisr = readl(chip->regs + HSU_PCI_DMAISR);
for (i = 0; i < chip->hsu->nr_channels; i++) {
- if (dmaisr & 0x1)
- ret |= hsu_dma_irq(chip, i);
+ if (dmaisr & 0x1) {
+ err = hsu_dma_get_status(chip, i, &status);
+ if (err > 0)
+ ret |= IRQ_HANDLED;
+ else if (err == 0)
+ ret |= hsu_dma_do_irq(chip, i, status);
+ }
dmaisr >>= 1;
}