diff -Nru linux-2.6.12-rc4.org/drivers/serial/cpm_uart/cpm_uart_core.c linux-2.6.12-rc4.new/drivers/serial/cpm_uart/cpm_uart_core.c
--- linux-2.6.12-rc4.org/drivers/serial/cpm_uart/cpm_uart_core.c	2005-05-07 01:20:31.000000000 -0400
+++ linux-2.6.12-rc4.new/drivers/serial/cpm_uart/cpm_uart_core.c	2005-05-19 13:48:58.000000000 -0400
@@ -335,23 +335,25 @@
 	pr_debug("CPM uart[%d]:IRQ\n", port->line);
 
 	if (IS_SMC(pinfo)) {
-		events = smcp->smc_smce;
+	    while ((events = smcp->smc_smce) & (SMCM_BRKE | SMCM_RX | SMCM_TX)) {
+		smcp->smc_smce = events;
 		if (events & SMCM_BRKE)
-			uart_handle_break(port);
+		    uart_handle_break(port);
 		if (events & SMCM_RX)
-			cpm_uart_int_rx(port, regs);
+		    cpm_uart_int_rx(port, regs);
 		if (events & SMCM_TX)
-			cpm_uart_int_tx(port, regs);
-		smcp->smc_smce = events;
+		    cpm_uart_int_tx(port, regs);
+	    }
 	} else {
-		events = sccp->scc_scce;
+	    while ((events = sccp->scc_scce) & (UART_SCCM_BRKE | UART_SCCM_RX | UART_SCCM_TX)) {
+		sccp->scc_scce = events;
 		if (events & UART_SCCM_BRKE)
-			uart_handle_break(port);
+		    uart_handle_break(port);
 		if (events & UART_SCCM_RX)
-			cpm_uart_int_rx(port, regs);
+		    cpm_uart_int_rx(port, regs);
 		if (events & UART_SCCM_TX)
-			cpm_uart_int_tx(port, regs);
-		sccp->scc_scce = events;
+		    cpm_uart_int_tx(port, regs);
+	    }
 	}
 	return (events) ? IRQ_HANDLED : IRQ_NONE;
 }