This helper blindly copies the iovec, even if we don't have one.
Make this case a bit smarter by only doing so if we have an iovec
array to copy.
Signed-off-by: Jens Axboe <axboe@kernel.dk>
bmd = kmalloc(struct_size(bmd, iov, data->nr_segs), gfp_mask);
if (!bmd)
return NULL;
- memcpy(bmd->iov, data->iov, sizeof(struct iovec) * data->nr_segs);
bmd->iter = *data;
- if (iter_is_iovec(data))
+ if (iter_is_iovec(data)) {
+ memcpy(bmd->iov, data->iov, sizeof(struct iovec) * data->nr_segs);
bmd->iter.iov = bmd->iov;
+ }
return bmd;
}