The patch titled
Subject: drivers/tty/serial/8250.c: ratelimit LSR safety check engaged warning
has been added to the -mm tree. Its filename is
drivers-tty-serial-8250c-ratelimit-lsr-safety-check-engaged-warning.patch
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------------------------------------------------------
From: Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>
Subject: drivers/tty/serial/8250.c: ratelimit LSR safety check engaged warning
On my BIOSTAR TA890FXE the ttyS0 ends up spewing:
[904682.485933] ttyS0: LSR safety check engaged!
[904692.505895] ttyS0: LSR safety check engaged!
[904702.525972] ttyS0: LSR safety check engaged!
[904712.545967] ttyS0: LSR safety check engaged!
[904722.566125] ttyS0: LSR safety check engaged!
..
let's limit it so it won't be the only thing visible in the ring buffer.
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>
Cc: Greg Kroah-Hartman <gregkh@xxxxxxx>
Cc: Alan Cox <alan@xxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxx>
---
drivers/tty/serial/8250.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff -puN drivers/tty/serial/8250.c~drivers-tty-serial-8250c-ratelimit-lsr-safety-check-engaged-warning drivers/tty/serial/8250.c
--- a/drivers/tty/serial/8250.c~drivers-tty-serial-8250c-ratelimit-lsr-safety-check-engaged-warning
+++ a/drivers/tty/serial/8250.c
@@ -2019,8 +2019,8 @@ static int serial8250_startup(struct uar
*/
if (!(up->port.flags & UPF_BUGGY_UART) &&
(serial_inp(up, UART_LSR) == 0xff)) {
- printk(KERN_INFO "ttyS%d: LSR safety check engaged!\n",
- serial_index(&up->port));
+ printk_ratelimited(KERN_INFO "ttyS%d: LSR safety check engaged!\n",
+ serial_index(&up->port));
return -ENODEV;
}
_
Subject: Subject: drivers/tty/serial/8250.c: ratelimit LSR safety check engaged warning
Patches currently in -mm which might be from konrad.wilk@xxxxxxxxxx are
origin.patch
linux-next.patch
x86-paravirt-pte-updates-in-kunmap_atomic-need-to-be-synchronous-regardless-of-lazy_mmu-mode.patch
drivers-tty-serial-8250c-ratelimit-lsr-safety-check-engaged-warning.patch
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