ioat: fix type mismatch for ->dmacount

->dmacount tracks the sequence number of active descriptors.  It is
written to the DMACOUNT register to update the channel's view of pending
descriptors in the chain.  The register is 16-bits so ->dmacount should
be unsigned and 16-bit as well.  Also modify ->desccount to maintain
alignment.

This was never a problem in practice because we never compared dmacount
values, but this is a bug waiting to happen.

Signed-off-by: Maciej Sosnowski <maciej.sosnowski@intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>

1 files changed, 2 insertions, 2 deletions

diff --git a/drivers/dma/ioat/dma.h b/drivers/dma/ioat/dma.h
index 1226e35f2709..9f0c853b6a77 100644
--- a/drivers/dma/ioat/dma.h
+++ b/drivers/dma/ioat/dma.h
@@ -102,8 +102,8 @@ struct ioat_dma_chan {
         struct delayed_work work;
 
         int pending;
-        int dmacount;
-        int desccount;
+        u16 dmacount;
+        u16 desccount;
 
         struct ioatdma_device *device;
         struct dma_chan common;