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powerpc/rtas: Use rtas_call_unlocked() in call_rtas_display_status()

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Although call_rtas_display_status() does actually want to use the
regular RTAS locking, it doesn't want the extra logic that is in
rtas_call(), so currently it open codes the logic.

Instead we can use rtas_call_unlocked(), after taking the RTAS lock.

Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
This commit is contained in:
Michael Ellerman 2015-11-24 22:26:11 +11:00
parent b2e8590fa1
commit 4456f45246
1 changed files with 2 additions and 10 deletions
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12
arch/powerpc/kernel/rtas.c
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@ -93,21 +93,13 @@ static void unlock_rtas(unsigned long flags)
*/
static void call_rtas_display_status(unsigned char c)
{
struct rtas_args *args = &rtas.args;
unsigned long s;
if (!rtas.base)
return;
s = lock_rtas();
args->token = cpu_to_be32(10);
args->nargs = cpu_to_be32(1);
args->nret = cpu_to_be32(1);
args->rets = &(args->args[1]);
args->args[0] = cpu_to_be32(c);
enter_rtas(__pa(args));
rtas_call_unlocked(&rtas.args, 10, 1, 1, NULL, c);
unlock_rtas(s);
}