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Revert "serial: 8250: Let drivers request full 16550A feature probing"

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This reverts commit 63a3d75cf1 which is
commit 9906890c89e4dbd900ed87ad3040080339a7f411 upstream.

It breaks the kernel api and is something needed by Android systems, so
it can be reverted.

Bug: 161946584
Change-Id: I4706c2055bdff8679b40efd3590fcca5050c3b71
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
This commit is contained in:
Greg Kroah-Hartman
2022-11-16 17:55:04 +00:00
parent f6d7d7caaa
commit 3ebc180a96
2 changed files with 2 additions and 4 deletions
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3
drivers/tty/serial/8250/8250_port.c
View File

@@ -1029,8 +1029,7 @@ static void autoconfig_16550a(struct uart_8250_port *up)
up->port.type = PORT_16550A;
up->capabilities |= UART_CAP_FIFO;
if (!IS_ENABLED(CONFIG_SERIAL_8250_16550A_VARIANTS) &&
!(up->port.flags & UPF_FULL_PROBE))
if (!IS_ENABLED(CONFIG_SERIAL_8250_16550A_VARIANTS))
return;
/*

3
include/linux/serial_core.h
View File

@@ -104,7 +104,7 @@ struct uart_icount {
__u32 buf_overrun;
};
typedef u64 __bitwise upf_t;
typedef unsigned int __bitwise upf_t;
typedef unsigned int __bitwise upstat_t;
struct uart_port {
@@ -211,7 +211,6 @@ struct uart_port {
#define UPF_FIXED_PORT ((__force upf_t) (1 << 29))
#define UPF_DEAD ((__force upf_t) (1 << 30))
#define UPF_IOREMAP ((__force upf_t) (1 << 31))
#define UPF_FULL_PROBE ((__force upf_t) (1ULL << 32))
#define __UPF_CHANGE_MASK 0x17fff
#define UPF_CHANGE_MASK ((__force upf_t) __UPF_CHANGE_MASK)