1 files changed, 22 insertions, 17 deletions

diff --git a/drivers/tty/serial/sh-sci.c b/drivers/tty/serial/sh-sci.c
index 7d8103cd3e2e..1a3fc7a2e4db 100644
--- a/drivers/tty/serial/sh-sci.c
+++ b/drivers/tty/serial/sh-sci.c
@@ -421,9 +421,9 @@ static void sci_port_enable(struct sci_port *sci_port)
 
         pm_runtime_get_sync(sci_port->port.dev);
 
-        clk_enable(sci_port->iclk);
+        clk_prepare_enable(sci_port->iclk);
         sci_port->port.uartclk = clk_get_rate(sci_port->iclk);
-        clk_enable(sci_port->fclk);
+        clk_prepare_enable(sci_port->fclk);
 }
 
 static void sci_port_disable(struct sci_port *sci_port)
@@ -431,8 +431,16 @@ static void sci_port_disable(struct sci_port *sci_port)
         if (!sci_port->port.dev)
                 return;
 
-        clk_disable(sci_port->fclk);
-        clk_disable(sci_port->iclk);
+        /* Cancel the break timer to ensure that the timer handler will not try
+         * to access the hardware with clocks and power disabled. Reset the
+         * break flag to make the break debouncing state machine ready for the
+         * next break.
+         */
+        del_timer_sync(&sci_port->break_timer);
+        sci_port->break_flag = 0;
+
+        clk_disable_unprepare(sci_port->fclk);
+        clk_disable_unprepare(sci_port->iclk);
 
         pm_runtime_put_sync(sci_port->port.dev);
 }
@@ -557,7 +565,7 @@ static inline int sci_rxd_in(struct uart_port *port)
                 return 1;
 
         /* Cast for ARM damage */
-        return !!__raw_readb((void __iomem *)s->cfg->port_reg);
+        return !!__raw_readb((void __iomem *)(uintptr_t)s->cfg->port_reg);
 }
 
 /* ********************************************************************** *
@@ -733,8 +741,6 @@ static void sci_break_timer(unsigned long data)
 {
         struct sci_port *port = (struct sci_port *)data;
 
-        sci_port_enable(port);
-
         if (sci_rxd_in(&port->port) == 0) {
                 port->break_flag = 1;
                 sci_schedule_break_timer(port);
@@ -744,8 +750,6 @@ static void sci_break_timer(unsigned long data)
                 sci_schedule_break_timer(port);
         } else
                 port->break_flag = 0;
-
-        sci_port_disable(port);
 }
 
 static int sci_handle_errors(struct uart_port *port)
@@ -1309,7 +1313,7 @@ static int sci_dma_rx_push(struct sci_port *s, size_t count)
         }
 
         if (room < count)
-                dev_warn(port->dev, "Rx overrun: dropping %u bytes\n",
+                dev_warn(port->dev, "Rx overrun: dropping %zu bytes\n",
                          count - room);
         if (!room)
                 return room;
@@ -1442,7 +1446,7 @@ static void work_fn_rx(struct work_struct *work)
                 int count;
 
                 chan->device->device_control(chan, DMA_TERMINATE_ALL, 0);
-                dev_dbg(port->dev, "Read %u bytes with cookie %d\n",
+                dev_dbg(port->dev, "Read %zu bytes with cookie %d\n",
                         sh_desc->partial, sh_desc->cookie);
 
                 spin_lock_irqsave(&port->lock, flags);
@@ -1691,16 +1695,17 @@ static void sci_request_dma(struct uart_port *port)
                 s->chan_tx = chan;
                 sg_init_table(&s->sg_tx, 1);
                 /* UART circular tx buffer is an aligned page. */
-                BUG_ON((int)port->state->xmit.buf & ~PAGE_MASK);
+                BUG_ON((uintptr_t)port->state->xmit.buf & ~PAGE_MASK);
                 sg_set_page(&s->sg_tx, virt_to_page(port->state->xmit.buf),
-                            UART_XMIT_SIZE, (int)port->state->xmit.buf & ~PAGE_MASK);
+                            UART_XMIT_SIZE,
+                            (uintptr_t)port->state->xmit.buf & ~PAGE_MASK);
                 nent = dma_map_sg(port->dev, &s->sg_tx, 1, DMA_TO_DEVICE);
                 if (!nent)
                         sci_tx_dma_release(s, false);
                 else
-                        dev_dbg(port->dev, "%s: mapped %d@%p to %x\n", __func__,
-                                sg_dma_len(&s->sg_tx),
-                                port->state->xmit.buf, sg_dma_address(&s->sg_tx));
+                        dev_dbg(port->dev, "%s: mapped %d@%p to %pad\n", __func__,
+                                sg_dma_len(&s->sg_tx), port->state->xmit.buf,
+                                &sg_dma_address(&s->sg_tx));
 
                 s->sg_len_tx = nent;
 
@@ -1740,7 +1745,7 @@ static void sci_request_dma(struct uart_port *port)
 
                         sg_init_table(sg, 1);
                         sg_set_page(sg, virt_to_page(buf[i]), s->buf_len_rx,
-                                    (int)buf[i] & ~PAGE_MASK);
+                                    (uintptr_t)buf[i] & ~PAGE_MASK);
                         sg_dma_address(sg) = dma[i];
                 }