• Yifeng Li's avatar
    mips: loongson64: lemote-2f: Add IRQF_NO_SUSPEND to "cascade" irqaction. · 5f5f67da
    Yifeng Li authored
    Timekeeping IRQs from CS5536 MFGPT are routed to i8259, which then
    triggers the "cascade" IRQ on MIPS CPU. Without IRQF_NO_SUSPEND in
    cascade_irqaction, MFGPT interrupts will be masked in suspend mode,
    and the machine would be unable to resume once suspended.
    
    Previously, MIPS IRQs were not disabled properly, so the original
    code appeared to work. Commit a3e6c1ef ("MIPS: IRQ: Fix disable_irq on
    CPU IRQs") uncovers the bug. To fix it, add IRQF_NO_SUSPEND to
    cascade_irqaction.
    
    This commit is functionally identical to 0add9c2f ("MIPS:
    Loongson-3: Add IRQF_NO_SUSPEND to Cascade irqaction"), but it forgot
    to apply the same fix to Loongson2.
    Signed-off-by: default avatarYifeng Li <tomli@tomli.me>
    Signed-off-by: default avatarPaul Burton <paul.burton@mips.com>
    Cc: linux-mips@vger.kernel.org
    Cc: Jiaxun Yang <jiaxun.yang@flygoat.com>
    Cc: Huacai Chen <chenhc@lemote.com>
    Cc: Ralf Baechle <ralf@linux-mips.org>
    Cc: James Hogan <jhogan@kernel.org>
    Cc: linux-kernel@vger.kernel.org
    Cc: stable@vger.kernel.org # v3.19+
    5f5f67da
irq.c 3.26 KB