diff options
Diffstat (limited to 'recipes-kernel/linux/linux-xlnx/3.10/tty-xuartps-Fix-RX-hang-and-TX-corruption-in-set_termios.patch')
| -rw-r--r-- | recipes-kernel/linux/linux-xlnx/3.10/tty-xuartps-Fix-RX-hang-and-TX-corruption-in-set_termios.patch | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/recipes-kernel/linux/linux-xlnx/3.10/tty-xuartps-Fix-RX-hang-and-TX-corruption-in-set_termios.patch b/recipes-kernel/linux/linux-xlnx/3.10/tty-xuartps-Fix-RX-hang-and-TX-corruption-in-set_termios.patch new file mode 100644 index 00000000..4ecd4e48 --- /dev/null +++ b/recipes-kernel/linux/linux-xlnx/3.10/tty-xuartps-Fix-RX-hang-and-TX-corruption-in-set_termios.patch @@ -0,0 +1,33 @@ +From c2a532266240230c5b49e56f1035e9ba27a61d96 Mon Sep 17 00:00:00 2001 +From: Nathan Rossi <nathan.rossi@xilinx.com> +Date: Mon, 24 Nov 2014 15:11:43 +1000 +Subject: [PATCH] tty: xuartps: Fix RX hang, and TX corruption in set_termios + +Signed-off-by: Nathan Rossi <nathan.rossi@xilinx.com> +--- + drivers/tty/serial/xilinx_uartps.c | 9 +++++---- + 1 file changed, 5 insertions(+), 4 deletions(-) + +diff --git a/drivers/tty/serial/xilinx_uartps.c b/drivers/tty/serial/xilinx_uartps.c +index faf2d90..7c842f2 100644 +--- a/drivers/tty/serial/xilinx_uartps.c ++++ b/drivers/tty/serial/xilinx_uartps.c +@@ -642,10 +642,11 @@ static void xuartps_set_termios(struct uart_port *port, + + spin_lock_irqsave(&port->lock, flags); + +- /* Empty the receive FIFO 1st before making changes */ +- while ((xuartps_readl(XUARTPS_SR_OFFSET) & +- XUARTPS_SR_RXEMPTY) != XUARTPS_SR_RXEMPTY) +- xuartps_readl(XUARTPS_FIFO_OFFSET); ++ /* Wait for the transmit FIFO to empty before making changes */ ++ if (!(xuartps_readl(XUARTPS_CR_OFFSET) & XUARTPS_CR_TX_DIS)) { ++ while (!(xuartps_readl(XUARTPS_SR_OFFSET) & XUARTPS_SR_TXEMPTY)) ++ cpu_relax(); ++ } + + /* Disable the TX and RX to set baud rate */ + xuartps_writel(xuartps_readl(XUARTPS_CR_OFFSET) | +-- +2.1.1 + |