write in 30M

hc

2024-02-20 ea08eeccae9297f7aabd2ef7f0c2517ac4549acc

 kernel/drivers/tty/serial/amba-pl011.c
..
..
@@ -1048,6 +1048,9 @@
1048
1048
  */
1049
1049
 static inline void pl011_dma_rx_stop(struct uart_amba_port *uap)
1050
1050
 {
1051
+	if (!uap->using_rx_dma)
1052
+		return;
1053
+
1051
1054
 	/* FIXME.  Just disable the DMA enable */
1052
1055
 	uap->dmacr &= ~UART011_RXDMAE;
1053
1056
 	pl011_write(uap->dmacr, uap, REG_DMACR);
..
..
@@ -1757,8 +1760,17 @@
1757
1760
 static void pl011_unthrottle_rx(struct uart_port *port)
1758
1761
 {
1759
1762
 	struct uart_amba_port *uap = container_of(port, struct uart_amba_port, port);
1763
+	unsigned long flags;
1760
1764
 
1761
-	pl011_enable_interrupts(uap);
1765
+	spin_lock_irqsave(&uap->port.lock, flags);
1766
+
1767
+	uap->im = UART011_RTIM;
1768
+	if (!pl011_dma_rx_running(uap))
1769
+		uap->im |= UART011_RXIM;
1770
+
1771
+	pl011_write(uap->im, uap, REG_IMSC);
1772
+
1773
+	spin_unlock_irqrestore(&uap->port.lock, flags);
1762
1774
 }
1763
1775
 
1764
1776
 static int pl011_startup(struct uart_port *port)