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dmaengine: bcm2835: fix 64-bit warning

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When building this driver on arm64, we get a harmless type
mismatch warning:

drivers/dma/bcm2835-dma.c: In function 'bcm2835_dma_fill_cb_chain_with_sg':
include/linux/kernel.h:743:17: warning: comparison of distinct pointer types lacks a cast
  (void) (&_min1 == &_min2);  \
                 ^
drivers/dma/bcm2835-dma.c:409:21: note: in expansion of macro 'min'
    cb->cb->length = min(len, max_len);

This changes the type of the 'len' variable to size_t, which
avoids the problem.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Fixes: 388cc7a281 ("dmaengine: bcm2835: add slave_sg support to bcm2835-dma")
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
This commit is contained in:
Arnd Bergmann 2016-06-30 14:47:10 +02:00 committed by Vinod Koul
parent 636372281f
commit 4aa819c79b
1 changed files with 3 additions and 2 deletions
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5
drivers/dma/bcm2835-dma.c
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@ -393,11 +393,12 @@ static void bcm2835_dma_fill_cb_chain_with_sg(
unsigned int sg_len) unsigned int sg_len)
{ {
struct bcm2835_chan *c = to_bcm2835_dma_chan(chan); struct bcm2835_chan *c = to_bcm2835_dma_chan(chan);
size_t max_len = bcm2835_dma_max_frame_length(c); size_t len, max_len;
unsigned int i, len; unsigned int i;
dma_addr_t addr; dma_addr_t addr;
struct scatterlist *sgent; struct scatterlist *sgent;
max_len = bcm2835_dma_max_frame_length(c);
for_each_sg(sgl, sgent, sg_len, i) { for_each_sg(sgl, sgent, sg_len, i) {
for (addr = sg_dma_address(sgent), len = sg_dma_len(sgent); for (addr = sg_dma_address(sgent), len = sg_dma_len(sgent);
len > 0; len > 0;