From: Nick Desaulniers ndesaulniers@google.com
[ Upstream commit 0e38225c92c7964482a8bb6b3e37fde4319e965c ]
request_irq is marked __must_check, but the call in shx3_prepare_cpus has a void return type, so it can't propagate failure to the caller. Follow cues from hexagon and just print an error.
Fixes: c7936b9abcf5 ("sh: smp: Hook in to the generic IPI handler for SH-X3 SMP.") Cc: Miguel Ojeda miguel.ojeda.sandonis@gmail.com Cc: Paul Mundt lethal@linux-sh.org Reported-by: Guenter Roeck linux@roeck-us.net Signed-off-by: Nick Desaulniers ndesaulniers@google.com Tested-by: John Paul Adrian Glaubitz glaubitz@physik.fu-berlin.de Reviewed-by: Miguel Ojeda ojeda@kernel.org Signed-off-by: Rich Felker dalias@libc.org Signed-off-by: Sasha Levin sashal@kernel.org --- arch/sh/kernel/cpu/sh4a/smp-shx3.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/arch/sh/kernel/cpu/sh4a/smp-shx3.c b/arch/sh/kernel/cpu/sh4a/smp-shx3.c index 4a298808789c4..4a1cee5da2dc5 100644 --- a/arch/sh/kernel/cpu/sh4a/smp-shx3.c +++ b/arch/sh/kernel/cpu/sh4a/smp-shx3.c @@ -78,8 +78,9 @@ static void shx3_prepare_cpus(unsigned int max_cpus) BUILD_BUG_ON(SMP_MSG_NR >= 8);
for (i = 0; i < SMP_MSG_NR; i++) - request_irq(104 + i, ipi_interrupt_handler, - IRQF_PERCPU, "IPI", (void *)(long)i); + if (request_irq(104 + i, ipi_interrupt_handler, + IRQF_PERCPU, "IPI", (void *)(long)i)) + pr_err("Failed to request irq %d\n", i);
for (i = 0; i < max_cpus; i++) set_cpu_present(i, true);