lightnvm: pblk: use right flag for GC allocation

The data buffer for the GC path allocates virtual memory through
vmalloc. When this change was introduced, a flag signaling kmalloc'ed
memory was wrongly introduced. Use the right flag when creating a bio
from this buffer.

Fixes: de54e703 ("lightnvm: pblk: use vmalloc for GC data buffer")
Signed-off-by: Javier González <javier@cnexlabs.com>
Signed-off-by: Matias Bjørling <m@bjorling.me>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

drivers/lightnvm/pblk-read.c

@@ -499,7 +499,7 @@ int pblk_submit_read_gc(struct pblk *pblk, u64 *lba_list, void *data,
 
 	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;
@@ -519,7 +519,7 @@ int pblk_submit_read_gc(struct pblk *pblk, u64 *lba_list, void *data,
 	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,
@@ -541,10 +541,13 @@ int pblk_submit_read_gc(struct pblk *pblk, u64 *lba_list, void *data,
 	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;