git: fe52c3384c61 - main - nvme_sim: Add comment about the is_failed test

The branch main has been updated by imp:

URL: https://cgit.FreeBSD.org/src/commit/?id=fe52c3384c61a092a305deebc063968a47dc854f

commit fe52c3384c61a092a305deebc063968a47dc854f
Author:     Warner Losh <imp@FreeBSD.org>
AuthorDate: 2024-03-06 21:30:01 +0000
Commit:     Warner Losh <imp@FreeBSD.org>
CommitDate: 2024-03-07 19:05:28 +0000

    nvme_sim: Add comment about the is_failed test
    
    We only see a request with a failed controller while we're in the
    process of failing the controller. Add a comment to that effect.
    
    Sponsored by:           Netflix
---
 sys/dev/nvme/nvme_sim.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/sys/dev/nvme/nvme_sim.c b/sys/dev/nvme/nvme_sim.c
index 70bb95602bf8..f561756f99b7 100644
--- a/sys/dev/nvme/nvme_sim.c
+++ b/sys/dev/nvme/nvme_sim.c
@@ -270,6 +270,10 @@ nvme_sim_action(struct cam_sim *sim, union ccb *ccb)
 	case XPT_NVME_IO:		/* Execute the requested I/O operation */
 	case XPT_NVME_ADMIN:		/* or Admin operation */
 		if (ctrlr->is_failed) {
+			/*
+			 * I/O came in while we were failing the drive, so drop
+			 * it. Once falure is complete, we'll be destroyed.
+			 */
 			ccb->ccb_h.status = CAM_DEV_NOT_THERE;
 			break;
 		}