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authorChristoph Hellwig <hch@lst.de>2022-12-21 09:51:19 +0100
committerChristoph Hellwig <hch@lst.de>2022-12-28 06:26:18 -1000
commit2a459f6933e1c459bffb7cc73fd6c900edc714bd (patch)
tree163b559700f4abbf1ba629d465828fba3ece715c
parentf2d1421391bba0b15684d2379a47a089f0e561d0 (diff)
nvmet: don't defer passthrough commands with trivial effects to the workqueue
Mask out the "Command Supported" and "Logical Block Content Change" bits and only defer execution of commands that have non-trivial effects to the workqueue for synchronous execution. This allows to execute admin commands asynchronously on controllers that provide a Command Supported and Effects log page, and will keep allowing to execute Write commands asynchronously once command effects on I/O commands are taken into account. Fixes: c1fef73f793b ("nvmet: add passthru code to process commands") Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Keith Busch <kbusch@kernel.org> Reviewed-by: Sagi Grimberg <sagi@grimberg.me> Reviewed-by: Kanchan Joshi <joshi.k@samsung.com>
-rw-r--r--drivers/nvme/target/passthru.c11
1 files changed, 5 insertions, 6 deletions
diff --git a/drivers/nvme/target/passthru.c b/drivers/nvme/target/passthru.c
index 79af5140af8b..adc0958755d6 100644
--- a/drivers/nvme/target/passthru.c
+++ b/drivers/nvme/target/passthru.c
@@ -334,14 +334,13 @@ static void nvmet_passthru_execute_cmd(struct nvmet_req *req)
}
/*
- * If there are effects for the command we are about to execute, or
- * an end_req function we need to use nvme_execute_passthru_rq()
- * synchronously in a work item seeing the end_req function and
- * nvme_passthru_end() can't be called in the request done callback
- * which is typically in interrupt context.
+ * If a command needs post-execution fixups, or there are any
+ * non-trivial effects, make sure to execute the command synchronously
+ * in a workqueue so that nvme_passthru_end gets called.
*/
effects = nvme_command_effects(ctrl, ns, req->cmd->common.opcode);
- if (req->p.use_workqueue || effects) {
+ if (req->p.use_workqueue ||
+ (effects & ~(NVME_CMD_EFFECTS_CSUPP | NVME_CMD_EFFECTS_LBCC))) {
INIT_WORK(&req->p.work, nvmet_passthru_execute_cmd_work);
req->p.rq = rq;
queue_work(nvmet_wq, &req->p.work);