data_len = (*secs_to_gc) * geo->sec_size;
        bio = pblk_bio_map_addr(pblk, data, *secs_to_gc, data_len,
-                                               PBLK_KMALLOC_META, GFP_KERNEL);
+                                               PBLK_VMALLOC_META, GFP_KERNEL);
        if (IS_ERR(bio)) {
                pr_err("pblk: could not allocate GC bio (%lu)\n", PTR_ERR(bio));
                goto err_free_dma;
        if (ret) {
                bio_endio(bio);
                pr_err("pblk: GC read request failed\n");
-               goto err_free_dma;
+               goto err_free_bio;
        }
 
        if (!wait_for_completion_io_timeout(&wait,
        atomic_long_sub(*secs_to_gc, &pblk->inflight_reads);
 #endif
 
+       bio_put(bio);
 out:
        nvm_dev_dma_free(dev->parent, rqd.meta_list, rqd.dma_meta_list);
        return NVM_IO_OK;
 
+err_free_bio:
+       bio_put(bio);
 err_free_dma:
        nvm_dev_dma_free(dev->parent, rqd.meta_list, rqd.dma_meta_list);
        return NVM_IO_ERR;