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sh: check return code of request_irq

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[ Upstream commit 0e38225c92 ]

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: c7936b9abc ("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>
This commit is contained in:
Nick Desaulniers 2020-12-22 12:54:01 -08:00 • committed by Justin Hammond
parent b5c5313212
commit a642f64365
1 changed files with 3 additions and 2 deletions
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5
arch/sh/kernel/cpu/sh4a/smp-shx3.c
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@ -73,8 +73,9 @@ 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);