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    Subject[PATCH 2/2] iio: buffer-dma: fix type of 'i' in iio_dma_buffer_alloc_blocks()
    Date
    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@intel.com>
    Signed-off-by: Alexandru Ardelean <alexandru.ardelean@analog.com>
    ---
    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
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