When unwinding the cleanup of the blocks, the type of 'i' is important to
be signed, so that the 'i >= 0' condition doesn't underflow and infinitely
loop (or just cause an access violation).
Fixes: ab925b044cfb ("iio: buffer-dma: Add mmap support")
Reported-by: kernel test robot <lkp@xxxxxxxxx>
Signed-off-by: Alexandru Ardelean <alexandru.ardelean@xxxxxxxxxx>
---
drivers/iio/buffer/industrialio-buffer-dma.c | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)
diff --git a/drivers/iio/buffer/industrialio-buffer-dma.c b/drivers/iio/buffer/industrialio-buffer-dma.c
index d04479194cb4..83074d060535 100644
--- a/drivers/iio/buffer/industrialio-buffer-dma.c
+++ b/drivers/iio/buffer/industrialio-buffer-dma.c
@@ -707,8 +707,7 @@ int iio_dma_buffer_alloc_blocks(struct iio_buffer *buffer,
struct iio_dma_buffer_queue *queue = iio_buffer_to_queue(buffer);
struct iio_dma_buffer_block **blocks;
unsigned int num_blocks;
- unsigned int i;
- int ret = 0;
+ int i, ret = 0;
mutex_lock(&queue->lock);
--
2.27.0
