Commit 9227ab56 authored by Anders Roxell's avatar Anders Roxell Committed by Vinod Koul

dmaengine: imx-dma: fix warning comparison of distinct pointer types

The warning got introduced by commit 930507c1 ("arm64: add basic
Kconfig symbols for i.MX8"). Since it got enabled for arm64. The warning
haven't been seen before since size_t was 'unsigned int' when built on

../drivers/dma/imx-dma.c: In function ‘imxdma_sg_next’:
../include/linux/kernel.h:846:29: warning: comparison of distinct pointer types lacks a cast
   (!!(sizeof((typeof(x) *)1 == (typeof(y) *)1)))
../include/linux/kernel.h:860:4: note: in expansion of macro ‘__typecheck’
   (__typecheck(x, y) && __no_side_effects(x, y))
../include/linux/kernel.h:870:24: note: in expansion of macro ‘__safe_cmp’
  __builtin_choose_expr(__safe_cmp(x, y), \
../include/linux/kernel.h:879:19: note: in expansion of macro ‘__careful_cmp’
 #define min(x, y) __careful_cmp(x, y, <)
../drivers/dma/imx-dma.c:288:8: note: in expansion of macro ‘min’
  now = min(d->len, sg_dma_len(sg));

Rework so that we use min_t and pass in the size_t that returns the
minimum of two values, using the specified type.
Signed-off-by: 's avatarAnders Roxell <>
Acked-by: Olof Johansson's avatarOlof Johansson <>
Reviewed-by: Fabio Estevam's avatarFabio Estevam <>
Signed-off-by: Vinod Koul's avatarVinod Koul <>
parent ad0d92d7
......@@ -285,7 +285,7 @@ static inline int imxdma_sg_next(struct imxdma_desc *d)
struct scatterlist *sg = d->sg;
unsigned long now;
now = min(d->len, sg_dma_len(sg));
now = min_t(size_t, d->len, sg_dma_len(sg));
if (d->len != IMX_DMA_LENGTH_LOOP)
d->len -= now;
Markdown is supported
0% or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment