b_chans = bdev->nchans - base_chan;
if (b_chans > n_left)
b_chans = n_left;
- b_mask = (1U << b_chans) - 1;
+ b_mask = (b_chans < 32) ? ((1 << b_chans) - 1)
+ : 0xffffffff;
b_write_mask = (write_mask >> n_done) & b_mask;
b_data_bits = (data_bits >> n_done) & b_mask;
/* Read/Write the new digital lines. */