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Subject[PATCH] nvme-pci: trigger disk activity LED
Date
Users can enable an LED to indicate I/O activity on NVMe PCIe devices:

# echo "disk-activity" > /sys/class/leds/<led>/trigger

for the composite activity, or disk-{read,write} for individual
activities/LEDs.

Signed-off-by: Enzo Matsumiya <ematsumiya@suse.de>
---
drivers/nvme/host/pci.c | 3 +++
1 file changed, 3 insertions(+)

diff --git a/drivers/nvme/host/pci.c b/drivers/nvme/host/pci.c
index 6a99ed680915..3e49d5980beb 100644
--- a/drivers/nvme/host/pci.c
+++ b/drivers/nvme/host/pci.c
@@ -15,6 +15,7 @@
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/io.h>
+#include <linux/leds.h>
#include <linux/mm.h>
#include <linux/module.h>
#include <linux/mutex.h>
@@ -1037,6 +1038,8 @@ static __always_inline void nvme_pci_unmap_rq(struct request *req)
rq_integrity_vec(req)->bv_len, rq_data_dir(req));
if (blk_rq_nr_phys_segments(req))
nvme_unmap_data(dev, req);
+
+ ledtrig_disk_activity(req_op(req) == REQ_OP_WRITE);
}

static void nvme_pci_complete_rq(struct request *req)
--
2.34.1
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