linux-kernel - [RFC 4/4] nvme: enable logical block size > PAGE

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Date:   Wed, 21 Jun 2023 10:38:23 +0200
From:   Pankaj Raghav <p.raghav@...sung.com>
To:     <hare@...e.de>, <willy@...radead.org>, <david@...morbit.com>
CC:     <gost.dev@...sung.com>, <mcgrof@...nel.org>, <hch@....de>,
        <jwong@...nel.org>, <linux-fsdevel@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>,
        Pankaj Raghav <p.raghav@...sung.com>
Subject: [RFC 4/4] nvme: enable logical block size > PAGE_SIZE

Don't set the capacity to zero for when logical block size > PAGE_SIZE
as the block device with iomap aops support allocating block cache with
a minimum folio order.

Signed-off-by: Pankaj Raghav <p.raghav@...sung.com>
---
 drivers/nvme/host/core.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c
index 98bfb3d9c22a..36cf610f938c 100644
--- a/drivers/nvme/host/core.c
+++ b/drivers/nvme/host/core.c
@@ -1886,7 +1886,7 @@ static void nvme_update_disk_info(struct gendisk *disk,
 	 * The block layer can't support LBA sizes larger than the page size
 	 * yet, so catch this early and don't allow block I/O.
 	 */
-	if (ns->lba_shift > PAGE_SHIFT) {
+	if ((ns->lba_shift > PAGE_SHIFT) && IS_ENABLED(CONFIG_BUFFER_HEAD)) {
 		capacity = 0;
 		bs = (1 << 9);
 	}
-- 
2.39.2