On 30. 05. 20 14:06, Jan Kiszka wrote:

On 04.05.20 16:27, Michal Simek wrote:

quoted

From: Shubhrajyoti Datta <redacted>

When serial console has been assigned to ttyPS1 (which is serial1 alias)
console index is not updated property and pointing to index -1 (statically
initialized) which ends up in situation where nothing has been printed on
the port.

The commit 18cc7ac8a28e ("Revert "serial: uartps: Register own uart console
and driver structures"") didn't contain this line which was removed by
accident.

Signed-off-by: Shubhrajyoti Datta <redacted>
Cc: stable <redacted>
Signed-off-by: Michal Simek <redacted>
---

Changes in v2:
- Do better commit description
- Origin subject was "tty: xilinx_uartps: Add the id to the console"

Greg: Would be good if you can take this patch to 5.7 and also to stable
trees.

---
 drivers/tty/serial/xilinx_uartps.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/tty/serial/xilinx_uartps.c b/drivers/tty/serial/xilinx_uartps.c
index 672cfa075e28..b9d672af8b65 100644
--- a/drivers/tty/serial/xilinx_uartps.c
+++ b/drivers/tty/serial/xilinx_uartps.c

@@ -1465,6 +1465,7 @@ static int cdns_uart_probe(struct platform_device *pdev)
 		cdns_uart_uart_driver.nr = CDNS_UART_NR_PORTS;
 #ifdef CONFIG_SERIAL_XILINX_PS_UART_CONSOLE
 		cdns_uart_uart_driver.cons = &cdns_uart_console;
+		cdns_uart_console.index = id;
 #endif

 		rc = uart_register_driver(&cdns_uart_uart_driver);

This breaks the ultra96-rev1 which uses uart1 as serial0 (and
stdout-path = "serial0:115200n8"). Reverting this commit gives

[    0.024344] Serial: AMBA PL011 UART driver
[    0.028010] ff000000.serial: ttyPS1 at MMIO 0xff000000 (irq = 19, base_baud = 6250000) is a xuartps
[    0.028172] serial serial0: tty port ttyPS1 registered
[    0.028579] ff010000.serial: ttyPS0 at MMIO 0xff010000 (irq = 20, base_baud = 6250000) is a xuartps
[    0.557477] printk: console [ttyPS0] enabled

again. Affects stable as well (seen first in 5.4).

Will take a look at this. Just give me some time.

M


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