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Anup Patel 15c123711c irqchip/sifive-plic: Setup cpuhp once after boot CPU handler is present
commit 2234ae846c upstream.

For multiple PLIC instances, the plic_init() is called once for each
PLIC instance. Due to this we have two issues:
1. cpuhp_setup_state() is called multiple times
2. plic_starting_cpu() can crash for boot CPU if cpuhp_setup_state()
   is called before boot CPU PLIC handler is available.

Address both issues by only initializing the HP notifiers when
the boot CPU setup is complete.

Fixes: f1ad1133b1 ("irqchip/sifive-plic: Add support for multiple PLICs")
Signed-off-by: Anup Patel <anup.patel@wdc.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Reviewed-by: Palmer Dabbelt <palmerdabbelt@google.com>
Acked-by: Palmer Dabbelt <palmerdabbelt@google.com>
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/20200518091441.94843-3-anup.patel@wdc.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-06-22 09:33:00 +02:00
2020-06-22 09:32:53 +02:00
2020-02-24 22:43:18 -08:00
2020-06-18 14:31:08 +02:00

Linux kernel
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