Merge tag 'tty-5.8-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty into master

Pull tty/serial/fbcon fixes from Greg KH:
 "Here are some small tty and serial and fbcon fixes for 5.8-rc7 to
  resolve some reported issues.

  The fbcon fix is in here as it was simpler to take it this way (and it
  was acked by the maintainer) as it was related to the vt console fix
  as well, both of which resolve syzbot-found issues in the console
  handling code.

  The other serial driver fixes are for small issues reported in the -rc
  releases.

  All of these have been in linux-next with no reported issues"

* tag 'tty-5.8-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty:
  serial: exar: Fix GPIO configuration for Sealevel cards based on XR17V35X
  fbdev: Detect integer underflow at "struct fbcon_ops"->clear_margins.
  serial: 8250_mtk: Fix high-speed baud rates clamping
  serial: 8250: fix null-ptr-deref in serial8250_start_tx()
  serial: tegra: drop bogus NULL tty-port checks
  serial: tegra: fix CREAD handling for PIO
  tty: xilinx_uartps: Really fix id assignment
  vt: Reject zero-sized screen buffer size.

1 files changed, 11 insertions, 1 deletions

diff --git a/drivers/tty/serial/8250/8250_exar.c b/drivers/tty/serial/8250/8250_exar.c
index ddb6aeb76dc5..04b9af7ed941 100644
--- a/drivers/tty/serial/8250/8250_exar.c
+++ b/drivers/tty/serial/8250/8250_exar.c
@@ -326,7 +326,17 @@ static void setup_gpio(struct pci_dev *pcidev, u8 __iomem *p)
 	 * devices will export them as GPIOs, so we pre-configure them safely
 	 * as inputs.
 	 */
-	u8 dir = pcidev->vendor == PCI_VENDOR_ID_EXAR ? 0xff : 0x00;
+
+	u8 dir = 0x00;
+
+	if  ((pcidev->vendor == PCI_VENDOR_ID_EXAR) &&
+		(pcidev->subsystem_vendor != PCI_VENDOR_ID_SEALEVEL)) {
+		// Configure GPIO as inputs for Commtech adapters
+		dir = 0xff;
+	} else {
+		// Configure GPIO as outputs for SeaLevel adapters
+		dir = 0x00;
+	}
 
 	writeb(0x00, p + UART_EXAR_MPIOINT_7_0);
 	writeb(0x00, p + UART_EXAR_MPIOLVL_7_0);