FAILED: patch "[PATCH] virtio_blk: Fix signedness bug in virtblk_prep_rq()" failed to apply to 6.0-stable tree

The patch below does not apply to the 6.0-stable tree.
If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <[email protected]>.

Possible dependencies:

a26116c1e740 ("virtio_blk: Fix signedness bug in virtblk_prep_rq()") 258896fcc786 ("virtio-blk: use a helper to handle request queuing errors")

thanks,

greg k-h

------------------ original commit in Linus's tree ------------------

From a26116c1e74028914f281851488546c91cbae57d Mon Sep 17 00:00:00 2001
From: Rafael Mendonca <[email protected]>
Date: Fri, 21 Oct 2022 17:41:26 -0300
Subject: [PATCH] virtio_blk: Fix signedness bug in virtblk_prep_rq()

The virtblk_map_data() function returns negative error codes, however, the 'nents' field of vbr->sg_table is an unsigned int, which causes the error handling not to work correctly.

Message-Id: <[email protected]>

index dcbf86cd2155..6a77fa917428 100644
@@ -334,14 +334,16 @@ static blk_status_t virtblk_prep_rq(struct blk_mq_hw_ctx *hctx,
 					struct virtblk_req *vbr)
 {
 	blk_status_t status;
+	int num;
 
 	status = virtblk_setup_cmd(vblk->vdev, req, vbr);
 	if (unlikely(status))
 		return status;
 
-	vbr->sg_table.nents = virtblk_map_data(hctx, req, vbr);
-	if (unlikely(vbr->sg_table.nents < 0))
+	num = virtblk_map_data(hctx, req, vbr);
+	if (unlikely(num < 0))
 		return virtblk_fail_to_queue(req, -ENOMEM);
+	vbr->sg_table.nents = num;
 
 	blk_mq_start_request(req);