Commit 18cb4bc3 authored by Anders Roxell's avatar Anders Roxell Committed by Stefan Bader

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

BugLink: https://bugs.launchpad.net/bugs/1828420

[ Upstream commit 9227ab56 ]

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
arm32.

../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: default avatarAnders Roxell <anders.roxell@linaro.org>
Acked-by: default avatarOlof Johansson <olof@lixom.net>
Reviewed-by: default avatarFabio Estevam <festevam@gmail.com>
Signed-off-by: default avatarVinod Koul <vkoul@kernel.org>
Signed-off-by: default avatarSasha Levin <sashal@kernel.org>
Signed-off-by: default avatarKleber Sacilotto de Souza <kleber.souza@canonical.com>
Signed-off-by: default avatarStefan Bader <stefan.bader@canonical.com>
parent 00e6d6d9
...@@ -286,7 +286,7 @@ static inline int imxdma_sg_next(struct imxdma_desc *d) ...@@ -286,7 +286,7 @@ static inline int imxdma_sg_next(struct imxdma_desc *d)
struct scatterlist *sg = d->sg; struct scatterlist *sg = d->sg;
unsigned long now; 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) if (d->len != IMX_DMA_LENGTH_LOOP)
d->len -= now; d->len -= now;
......
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