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| author | Hari Bathini <hbathini@linux.ibm.com> | 2023-06-09 10:14:04 +0300 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2023-08-18 13:25:52 +0300 |
| commit | b949ee6801f4a47ae0e02845242c99af351c4d26 (patch) | |
| tree | fd0f729ec47e24ac363ec9696ccf83741bd8eaee /arch/powerpc | |
| parent | 701ca3657d5d489add2bedce0c31938e521c7913 (diff) | |
| download | linux-b949ee6801f4a47ae0e02845242c99af351c4d26.tar.xz | |
powerpc/fadump: invoke ibm,os-term with rtas_call_unlocked()
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
Diffstat (limited to 'arch/powerpc')
| -rw-r--r-- | arch/powerpc/kernel/rtas.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/arch/powerpc/kernel/rtas.c b/arch/powerpc/kernel/rtas.c index c087eeee320f..a8192e5b1a5f 100644 --- a/arch/powerpc/kernel/rtas.c +++ b/arch/powerpc/kernel/rtas.c @@ -1587,6 +1587,7 @@ static bool ibm_extended_os_term; void rtas_os_term(char *str) { s32 token = rtas_function_token(RTAS_FN_IBM_OS_TERM); + static struct rtas_args args; int status; /* @@ -1607,7 +1608,8 @@ void rtas_os_term(char *str) * 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) |