linux-kernel - [PATCH] nvme-pci: make use_threaded

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Message-Id: <20220322023512.98644-1-xhao@linux.alibaba.com>
Date:   Tue, 22 Mar 2022 10:35:12 +0800
From:   Xin Hao <xhao@...ux.alibaba.com>
To:     kbusch@...nel.org
Cc:     axboe@...com, hch@....de, sagi@...mberg.me,
        linux-nvme@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: [PATCH] nvme-pci: make use_threaded_interrupts mod-param read-only

When I execute "insmod nvme.ko use_threaded_interrupts=1",
I find it difficult to determine whether it is successful
or not, So I want to add read-only parameter to
'/sys/module/nvme/parameters/use_threaded_interrupts',
When insmoded successfully.
    # cat /sys/module/nvme/parameters/use_threaded_interrupts
    # 1

Signed-off-by: Xin Hao <xhao@...ux.alibaba.com>
---
 drivers/nvme/host/pci.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/nvme/host/pci.c b/drivers/nvme/host/pci.c
index 6a99ed680915..27cd20130021 100644
--- a/drivers/nvme/host/pci.c
+++ b/drivers/nvme/host/pci.c
@@ -44,7 +44,7 @@
 #define NVME_MAX_SEGS	127

 static int use_threaded_interrupts;
-module_param(use_threaded_interrupts, int, 0);
+module_param(use_threaded_interrupts, int, 0444);

 static bool use_cmb_sqes = true;
 module_param(use_cmb_sqes, bool, 0444);
--
2.31.0