platform/mellanox: mlxreg-hotplug: move to use request_irq by IRQF_NO_AUTOEN flag

disable_irq() after request_irq() still has a time gap in which
interrupts can come. request_irq() with IRQF_NO_AUTOEN flag will
disable IRQ auto-enable because of requesting.

this patch is made base on "add IRQF_NO_AUTOEN for request_irq" which
is being merged: https://lore.kernel.org/patchwork/patch/1388765/

Signed-off-by: Tian Tao <tiantao6@hisilicon.com>
Acked-by: Vadim Pasternak <vadimp@nvidia.com>
Link: https://lore.kernel.org/r/1617785983-28878-1-git-send-email-tiantao6@hisilicon.com
Signed-off-by: Hans de Goede <hdegoede@redhat.com>

diff --git a/drivers/platform/mellanox/mlxreg-hotplug.c b/drivers/platform/mellanox/mlxreg-hotplug.c
index b013445..a9db2f3 100644 (file)
--- a/drivers/platform/mellanox/mlxreg-hotplug.c
+++ b/drivers/platform/mellanox/mlxreg-hotplug.c
@@ -683,13 +683,13 @@ static int mlxreg_hotplug_probe(struct platform_device *pdev)
 
        err = devm_request_irq(&pdev->dev, priv->irq,
                               mlxreg_hotplug_irq_handler, IRQF_TRIGGER_FALLING
-                              | IRQF_SHARED, "mlxreg-hotplug", priv);
+                              | IRQF_SHARED | IRQF_NO_AUTOEN,
+                              "mlxreg-hotplug", priv);
        if (err) {
                dev_err(&pdev->dev, "Failed to request irq: %d\n", err);
                return err;
        }
 
-       disable_irq(priv->irq);
        spin_lock_init(&priv->lock);
        INIT_DELAYED_WORK(&priv->dwork_irq, mlxreg_hotplug_work_handler);
        dev_set_drvdata(&pdev->dev, priv);