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commit 3b49791e4cc2f38dd84bf331b75217adaef636e3
Author: Bertrand Marquis <bertrand.marquis@arm.com>
AuthorDate: Fri Oct 16 14:58:47 2020 +0100
Commit: Stefano Stabellini <sstabellini@kernel.org>
CommitDate: Tue Oct 20 13:20:31 2020 -0700

xen/arm: Print message if reset did not work

If for some reason the hardware reset is not working, print a message to
the user every 5 seconds to warn him that the system did not reset
properly and Xen is still looping.

The message is printed infinitely so that someone connecting to a serial
console with no history would see the message coming after 5 seconds.

Signed-off-by: Bertrand Marquis <bertrand.marquis@arm.com>
Reviewed-by: Stefano Stabellini <sstabellini@kernel.org>
[stefano: remove second '!']
Signed-off-by: Stefano Stabellini <stefano.stabellini@xilinx.com>
---
xen/arch/arm/shutdown.c | 4 ++++
1 file changed, 4 insertions(+)

diff --git a/xen/arch/arm/shutdown.c b/xen/arch/arm/shutdown.c
index b32f07ec0e..3dc6819d56 100644
--- a/xen/arch/arm/shutdown.c
+++ b/xen/arch/arm/shutdown.c
@@ -36,6 +36,7 @@ void machine_halt(void)
void machine_restart(unsigned int delay_millisecs)
{
int timeout = 10;
+ unsigned long count = 0;

watchdog_disable();
console_start_sync();
@@ -59,6 +60,9 @@ void machine_restart(unsigned int delay_millisecs)
{
platform_reset();
mdelay(100);
+ if ( (count % 50) == 0 )
+ printk(XENLOG_ERR "Xen: Platform reset did not work properly!\n");
+ count++;
}
}

--
generated by git-patchbot for /home/xen/git/xen.git#master