patch "serial: tegra: fix CREAD handling for PIO" added to tty-linus

This is a note to let you know that I've just added the patch titled

serial: tegra: fix CREAD handling for PIO

to my tty git tree which can be found at
git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty.git
in the tty-linus branch.

The patch will show up in the next release of the linux-next tree (usually sometime within the next 24 hours during the week.)

The patch will hopefully also be merged in Linus's tree for the next -rc kernel release.

If you have any questions about this process, please let me know.

From b374c562ee7ab3f3a1daf959c01868bae761571c Mon Sep 17 00:00:00 2001
From: Johan Hovold <[email protected]>
Date: Fri, 10 Jul 2020 15:59:46 +0200
Subject: serial: tegra: fix CREAD handling for PIO

Commit 33ae787b74fc ("serial: tegra: add support to ignore read") added support for dropping input in case CREAD isn't set, but for PIO the ignore_status_mask wasn't checked until after the character had been put in the receive buffer.

Note that the NULL tty-port test is bogus and will be removed by a follow-on patch.

---
 drivers/tty/serial/serial-tegra.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

index 8de8bac9c6c7..b3bbee6b6702 100644
@@ -653,11 +653,14 @@ static void tegra_uart_handle_rx_pio(struct tegra_uart_port *tup,
 		ch = (unsigned char) tegra_uart_read(tup, UART_RX);
 		tup->uport.icount.rx++;
 
-		if (!uart_handle_sysrq_char(&tup->uport, ch) && tty)
-			tty_insert_flip_char(tty, ch, flag);
+		if (uart_handle_sysrq_char(&tup->uport, ch))
+			continue;
 
 		if (tup->uport.ignore_status_mask & UART_LSR_DR)
 			continue;
+
+		if (tty)
+			tty_insert_flip_char(tty, ch, flag);
 	} while (1);
 }
 

2.27.0