kernel_5.10 no rt

hc

2023-12-11 6778948f9de86c3cfaf36725a7c87dcff9ba247f

 kernel/drivers/net/ethernet/chelsio/cxgb/cxgb2.c
..
..
@@ -211,10 +211,9 @@
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 	t1_interrupts_clear(adapter);
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212
 
213
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 	adapter->params.has_msi = !disable_msi && !pci_enable_msi(adapter->pdev);
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-	err = request_threaded_irq(adapter->pdev->irq, t1_interrupt,
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-				   t1_interrupt_thread,
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-				   adapter->params.has_msi ? 0 : IRQF_SHARED,
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-				   adapter->name, adapter);
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+	err = request_irq(adapter->pdev->irq, t1_interrupt,
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+			  adapter->params.has_msi ? 0 : IRQF_SHARED,
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+			  adapter->name, adapter);
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 	if (err) {
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 		if (adapter->params.has_msi)
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 			pci_disable_msi(adapter->pdev);
..
..
@@ -917,6 +916,51 @@
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916
 	spin_unlock(&adapter->work_lock);
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 }
919
918
 
919
+/*
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+ * Processes elmer0 external interrupts in process context.
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+ */
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+static void ext_intr_task(struct work_struct *work)
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+{
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+	struct adapter *adapter =
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+		container_of(work, struct adapter, ext_intr_handler_task);
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+
927
+	t1_elmer0_ext_intr_handler(adapter);
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+
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+	/* Now reenable external interrupts */
930
+	spin_lock_irq(&adapter->async_lock);
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+	adapter->slow_intr_mask |= F_PL_INTR_EXT;
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+	writel(F_PL_INTR_EXT, adapter->regs + A_PL_CAUSE);
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+	writel(adapter->slow_intr_mask | F_PL_INTR_SGE_DATA,
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+		   adapter->regs + A_PL_ENABLE);
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+	spin_unlock_irq(&adapter->async_lock);
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+}
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+
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+/*
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+ * Interrupt-context handler for elmer0 external interrupts.
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+ */
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+void t1_elmer0_ext_intr(struct adapter *adapter)
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+{
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+	/*
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+	 * Schedule a task to handle external interrupts as we require
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+	 * a process context.  We disable EXT interrupts in the interim
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+	 * and let the task reenable them when it's done.
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+	 */
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+	adapter->slow_intr_mask &= ~F_PL_INTR_EXT;
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+	writel(adapter->slow_intr_mask | F_PL_INTR_SGE_DATA,
950
+		   adapter->regs + A_PL_ENABLE);
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+	schedule_work(&adapter->ext_intr_handler_task);
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+}
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+
954
+void t1_fatal_err(struct adapter *adapter)
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+{
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+	if (adapter->flags & FULL_INIT_DONE) {
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+		t1_sge_stop(adapter->sge);
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+		t1_interrupts_disable(adapter);
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+	}
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+	pr_alert("%s: encountered fatal error, operation suspended\n",
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+		 adapter->name);
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+}
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+
920
964
 static const struct net_device_ops cxgb_netdev_ops = {
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965
 	.ndo_open		= cxgb_open,
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966
 	.ndo_stop		= cxgb_close,
..
..
@@ -1018,6 +1062,8 @@
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 			spin_lock_init(&adapter->async_lock);
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 			spin_lock_init(&adapter->mac_lock);
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1064
 
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+			INIT_WORK(&adapter->ext_intr_handler_task,
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+				  ext_intr_task);
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 			INIT_DELAYED_WORK(&adapter->stats_update_task,
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1068
 					  mac_stats_task);
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1069