Invoke ibm,os-term call with rtas_call_unlocked(), without using the
RTAS spinlock, to avoid deadlock in the unlikely event of a machine
crash while making an RTAS call.
Signed-off-by: Hari Bathini <hbathini@linux.ibm.com>
Reviewed-by: Mahesh Salgaonkar <mahesh@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/20230609071404.425529-1-hbathini@linux.ibm.com
void rtas_os_term(char *str)
{
s32 token = rtas_function_token(RTAS_FN_IBM_OS_TERM);
+ static struct rtas_args args;
int status;
/*
* schedules.
*/
do {
- status = rtas_call(token, 1, 1, NULL, __pa(rtas_os_term_buf));
+ rtas_call_unlocked(&args, token, 1, 1, NULL, __pa(rtas_os_term_buf));
+ status = be32_to_cpu(args.rets[0]);
} while (rtas_busy_delay_time(status));
if (status != 0)