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dmaengine: ioatdma: fix u16 overflow in cleanup 

If the allocation order is 16, then the u16 count will overflow and wrap
to zero when assigned the value 1 << 16.

Change the type of 'total_descs' to int, so that it is large enough to
store a value equal or greater than 1 << 16.

Signed-off-by: Allen Hubbe <Allen.Hubbe@emc.com>
Acked-by: Dave Jiang <dave.jiang@intel.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
hifive-unleashed-5.1
Allen Hubbe 2015-08-11 04:05:43 -04:00 committed by Vinod Koul
parent 870ce49022
commit 5484526ac1
1 changed files with 1 additions and 1 deletions
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2
drivers/dma/ioat/dma_v2.c
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@ -798,7 +798,7 @@ void ioat2_free_chan_resources(struct dma_chan *c)
struct ioat_chan_common *chan = &ioat->base;
struct ioatdma_device *device = chan->device;
struct ioat_ring_ent *desc;
const u16 total_descs = 1 << ioat->alloc_order;
const int total_descs = 1 << ioat->alloc_order;
int descs;
int i;