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@xxxxxxxx>
Fixes: 388cc7a281c0 ("dmaengine: bcm2835: add slave_sg support to bcm2835-dma")
---
drivers/dma/bcm2835-dma.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/drivers/dma/bcm2835-dma.c b/drivers/dma/bcm2835-dma.c
index 9ecb94238aaf..e18dc596cf24 100644
--- a/drivers/dma/bcm2835-dma.c
+++ b/drivers/dma/bcm2835-dma.c
@@ -393,11 +393,12 @@ static void bcm2835_dma_fill_cb_chain_with_sg(
unsigned int sg_len)
{
struct bcm2835_chan *c = to_bcm2835_dma_chan(chan);
- size_t max_len = bcm2835_dma_max_frame_length(c);
- unsigned int i, len;
+ size_t len, max_len;
+ unsigned int i;
dma_addr_t addr;
struct scatterlist *sgent;
+ max_len = bcm2835_dma_max_frame_length(c);
for_each_sg(sgl, sgent, sg_len, i) {
for (addr = sg_dma_address(sgent), len = sg_dma_len(sgent);
len > 0;
--
2.9.0
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