5 files changed, 70 insertions, 35 deletions

diff --git a/drivers/tty/n_tty.c b/drivers/tty/n_tty.c
index d2b496750d59..4ddfa60c9222 100644
--- a/drivers/tty/n_tty.c
+++ b/drivers/tty/n_tty.c
@@ -2399,17 +2399,12 @@ static unsigned int n_tty_poll(struct tty_struct *tty, struct file *file,
 
         poll_wait(file, &tty->read_wait, wait);
         poll_wait(file, &tty->write_wait, wait);
-        if (test_bit(TTY_OTHER_CLOSED, &tty->flags))
-                mask |= POLLHUP;
         if (input_available_p(tty, 1))
                 mask |= POLLIN | POLLRDNORM;
-        else if (mask & POLLHUP) {
-                tty_flush_to_ldisc(tty);
-                if (input_available_p(tty, 1))
-                        mask |= POLLIN | POLLRDNORM;
-        }
         if (tty->packet && tty->link->ctrl_status)
                 mask |= POLLPRI | POLLIN | POLLRDNORM;
+        if (test_bit(TTY_OTHER_CLOSED, &tty->flags))
+                mask |= POLLHUP;
         if (tty_hung_up_p(file))
                 mask |= POLLHUP;
         if (!(mask & (POLLHUP | POLLIN | POLLRDNORM))) {
diff --git a/drivers/tty/serial/8250/8250_pci.c b/drivers/tty/serial/8250/8250_pci.c
index 31feeb2d0a66..d1f8dc6aabcb 100644
--- a/drivers/tty/serial/8250/8250_pci.c
+++ b/drivers/tty/serial/8250/8250_pci.c
@@ -1815,7 +1815,7 @@ pci_wch_ch353_setup(struct serial_private *priv,
 }
 
 static int
-pci_wch_ch382_setup(struct serial_private *priv,
+pci_wch_ch38x_setup(struct serial_private *priv,
                     const struct pciserial_board *board,
                     struct uart_8250_port *port, int idx)
 {
@@ -1880,6 +1880,7 @@ pci_wch_ch382_setup(struct serial_private *priv,
 
 #define PCIE_VENDOR_ID_WCH              0x1c00
 #define PCIE_DEVICE_ID_WCH_CH382_2S1P   0x3250
+#define PCIE_DEVICE_ID_WCH_CH384_4S     0x3470
 
 /* Unknown vendors/cards - this should not be in linux/pci_ids.h */
 #define PCI_SUBDEVICE_ID_UNKNOWN_0x1584 0x1584
@@ -2571,13 +2572,21 @@ static struct pci_serial_quirk pci_serial_quirks[] __refdata = {
                 .subdevice      = PCI_ANY_ID,
                 .setup          = pci_wch_ch353_setup,
         },
-        /* WCH CH382 2S1P card (16750 clone) */
+        /* WCH CH382 2S1P card (16850 clone) */
         {
                 .vendor         = PCIE_VENDOR_ID_WCH,
                 .device         = PCIE_DEVICE_ID_WCH_CH382_2S1P,
                 .subvendor      = PCI_ANY_ID,
                 .subdevice      = PCI_ANY_ID,
-                .setup          = pci_wch_ch382_setup,
+                .setup          = pci_wch_ch38x_setup,
+        },
+        /* WCH CH384 4S card (16850 clone) */
+        {
+                .vendor         = PCIE_VENDOR_ID_WCH,
+                .device         = PCIE_DEVICE_ID_WCH_CH384_4S,
+                .subvendor      = PCI_ANY_ID,
+                .subdevice      = PCI_ANY_ID,
+                .setup          = pci_wch_ch38x_setup,
         },
         /*
          * ASIX devices with FIFO bug
@@ -2876,6 +2885,7 @@ enum pci_board_num_t {
         pbn_fintek_4,
         pbn_fintek_8,
         pbn_fintek_12,
+        pbn_wch384_4,
 };
 
 /*
@@ -3675,6 +3685,14 @@ static struct pciserial_board pci_boards[] = {
                 .base_baud      = 115200,
                 .first_offset   = 0x40,
         },
+
+        [pbn_wch384_4] = {
+                .flags          = FL_BASE0,
+                .num_ports      = 4,
+                .base_baud      = 115200,
+                .uart_offset    = 8,
+                .first_offset   = 0xC0,
+        },
 };
 
 static const struct pci_device_id blacklist[] = {
@@ -3687,6 +3705,7 @@ static const struct pci_device_id blacklist[] = {
         { PCI_DEVICE(0x4348, 0x7053), }, /* WCH CH353 2S1P */
         { PCI_DEVICE(0x4348, 0x5053), }, /* WCH CH353 1S1P */
         { PCI_DEVICE(0x1c00, 0x3250), }, /* WCH CH382 2S1P */
+        { PCI_DEVICE(0x1c00, 0x3470), }, /* WCH CH384 4S */
 };
 
 /*
@@ -5400,6 +5419,10 @@ static struct pci_device_id serial_pci_tbl[] = {
                 PCI_ANY_ID, PCI_ANY_ID,
                 0, 0, pbn_b0_bt_2_115200 },
 
+        {       PCIE_VENDOR_ID_WCH, PCIE_DEVICE_ID_WCH_CH384_4S,
+                PCI_ANY_ID, PCI_ANY_ID,
+                0, 0, pbn_wch384_4 },
+
         /*
          * Commtech, Inc. Fastcom adapters
          */
diff --git a/drivers/tty/serial/samsung.c b/drivers/tty/serial/samsung.c
index 19273e31d224..107e80722575 100644
--- a/drivers/tty/serial/samsung.c
+++ b/drivers/tty/serial/samsung.c
@@ -1757,32 +1757,43 @@ static struct s3c24xx_serial_drv_data s5pv210_serial_drv_data = {
 #endif
 
 #if defined(CONFIG_ARCH_EXYNOS)
+#define EXYNOS_COMMON_SERIAL_DRV_DATA                           \
+        .info = &(struct s3c24xx_uart_info) {                   \
+                .name           = "Samsung Exynos UART",        \
+                .type           = PORT_S3C6400,                 \
+                .has_divslot    = 1,                            \
+                .rx_fifomask    = S5PV210_UFSTAT_RXMASK,        \
+                .rx_fifoshift   = S5PV210_UFSTAT_RXSHIFT,       \
+                .rx_fifofull    = S5PV210_UFSTAT_RXFULL,        \
+                .tx_fifofull    = S5PV210_UFSTAT_TXFULL,        \
+                .tx_fifomask    = S5PV210_UFSTAT_TXMASK,        \
+                .tx_fifoshift   = S5PV210_UFSTAT_TXSHIFT,       \
+                .def_clk_sel    = S3C2410_UCON_CLKSEL0,         \
+                .num_clks       = 1,                            \
+                .clksel_mask    = 0,                            \
+                .clksel_shift   = 0,                            \
+        },                                                      \
+        .def_cfg = &(struct s3c2410_uartcfg) {                  \
+                .ucon           = S5PV210_UCON_DEFAULT,         \
+                .ufcon          = S5PV210_UFCON_DEFAULT,        \
+                .has_fracval    = 1,                            \
+        }                                                       \
+
 static struct s3c24xx_serial_drv_data exynos4210_serial_drv_data = {
-        .info = &(struct s3c24xx_uart_info) {
-                .name           = "Samsung Exynos4 UART",
-                .type           = PORT_S3C6400,
-                .has_divslot    = 1,
-                .rx_fifomask    = S5PV210_UFSTAT_RXMASK,
-                .rx_fifoshift   = S5PV210_UFSTAT_RXSHIFT,
-                .rx_fifofull    = S5PV210_UFSTAT_RXFULL,
-                .tx_fifofull    = S5PV210_UFSTAT_TXFULL,
-                .tx_fifomask    = S5PV210_UFSTAT_TXMASK,
-                .tx_fifoshift   = S5PV210_UFSTAT_TXSHIFT,
-                .def_clk_sel    = S3C2410_UCON_CLKSEL0,
-                .num_clks       = 1,
-                .clksel_mask    = 0,
-                .clksel_shift   = 0,
-        },
-        .def_cfg = &(struct s3c2410_uartcfg) {
-                .ucon           = S5PV210_UCON_DEFAULT,
-                .ufcon          = S5PV210_UFCON_DEFAULT,
-                .has_fracval    = 1,
-        },
+        EXYNOS_COMMON_SERIAL_DRV_DATA,
         .fifosize = { 256, 64, 16, 16 },
 };
+
+static struct s3c24xx_serial_drv_data exynos5433_serial_drv_data = {
+        EXYNOS_COMMON_SERIAL_DRV_DATA,
+        .fifosize = { 64, 256, 16, 256 },
+};
+
 #define EXYNOS4210_SERIAL_DRV_DATA ((kernel_ulong_t)&exynos4210_serial_drv_data)
+#define EXYNOS5433_SERIAL_DRV_DATA ((kernel_ulong_t)&exynos5433_serial_drv_data)
 #else
 #define EXYNOS4210_SERIAL_DRV_DATA (kernel_ulong_t)NULL
+#define EXYNOS5433_SERIAL_DRV_DATA (kernel_ulong_t)NULL
 #endif
 
 static struct platform_device_id s3c24xx_serial_driver_ids[] = {
@@ -1804,6 +1815,9 @@ static struct platform_device_id s3c24xx_serial_driver_ids[] = {
         }, {
                 .name           = "exynos4210-uart",
                 .driver_data    = EXYNOS4210_SERIAL_DRV_DATA,
+        }, {
+                .name           = "exynos5433-uart",
+                .driver_data    = EXYNOS5433_SERIAL_DRV_DATA,
         },
         { },
 };
@@ -1823,6 +1837,8 @@ static const struct of_device_id s3c24xx_uart_dt_match[] = {
                 .data = (void *)S5PV210_SERIAL_DRV_DATA },
         { .compatible = "samsung,exynos4210-uart",
                 .data = (void *)EXYNOS4210_SERIAL_DRV_DATA },
+        { .compatible = "samsung,exynos5433-uart",
+                .data = (void *)EXYNOS5433_SERIAL_DRV_DATA },
         {},
 };
 MODULE_DEVICE_TABLE(of, s3c24xx_uart_dt_match);
diff --git a/drivers/tty/serial/serial_core.c b/drivers/tty/serial/serial_core.c
index 57ca61b14670..984605bb5bf1 100644
--- a/drivers/tty/serial/serial_core.c
+++ b/drivers/tty/serial/serial_core.c
@@ -2164,7 +2164,9 @@ uart_report_port(struct uart_driver *drv, struct uart_port *port)
                 break;
         }
 
-        dev_info(port->dev, "%s%d at %s (irq = %d, base_baud = %d) is a %s\n",
+        printk(KERN_INFO "%s%s%s%d at %s (irq = %d, base_baud = %d) is a %s\n",
+               port->dev ? dev_name(port->dev) : "",
+               port->dev ? ": " : "",
                drv->dev_name,
                drv->tty_driver->name_base + port->line,
                address, port->irq, port->uartclk / 16, uart_type(port));
diff --git a/drivers/tty/tty_io.c b/drivers/tty/tty_io.c
index 4f35b43e2475..51f066aa375e 100644
--- a/drivers/tty/tty_io.c
+++ b/drivers/tty/tty_io.c
@@ -1464,6 +1464,9 @@ static int tty_reopen(struct tty_struct *tty)
             driver->subtype == PTY_TYPE_MASTER)
                 return -EIO;
 
+        if (test_bit(TTY_EXCLUSIVE, &tty->flags) && !capable(CAP_SYS_ADMIN))
+                return -EBUSY;
+
         tty->count++;
 
         WARN_ON(!tty->ldisc);
@@ -2106,10 +2109,6 @@ retry_open:
                 retval = -ENODEV;
         filp->f_flags = saved_flags;
 
-        if (!retval && test_bit(TTY_EXCLUSIVE, &tty->flags) &&
-                                                !capable(CAP_SYS_ADMIN))
-                retval = -EBUSY;
-
         if (retval) {
 #ifdef TTY_DEBUG_HANGUP
                 printk(KERN_DEBUG "%s: error %d in opening %s...\n", __func__,