• Binbin Wu's avatar
    mfd: intel-lpss: Set the device in reset state when init · dad06532
    Binbin Wu authored
    In virtualized setup, when system reboots due to warm
    reset interrupt storm is seen.
    
    Call Trace:
    <IRQ>
    dump_stack+0x70/0xa5
    __report_bad_irq+0x2e/0xc0
    note_interrupt+0x248/0x290
    ? add_interrupt_randomness+0x30/0x220
    handle_irq_event_percpu+0x54/0x80
    handle_irq_event+0x39/0x60
    handle_fasteoi_irq+0x91/0x150
    handle_irq+0x108/0x180
    do_IRQ+0x52/0xf0
    common_interrupt+0xf/0xf
    </IRQ>
    RIP: 0033:0x76fc2cfabc1d
    Code: 24 28 bf 03 00 00 00 31 c0 48 8d 35 63 77 0e 00 48 8d 15 2e
    94 0e 00 4c 89 f9 49 89 d9 4c 89 d3 e8 b8 e2 01 00 48 8b 54 24 18
    <48> 89 ef 48 89 de 4c 89 e1 e8 d5 97 01 00 84 c0 74 2d 48 8b 04
    24
    RSP: 002b:00007ffd247c1fc0 EFLAGS: 00000293 ORIG_RAX: ffffffffffffffda
    RAX: 0000000000000000 RBX: 00007ffd247c1ff0 RCX: 000000000003d3ce
    RDX: 0000000000000000 RSI: 00007ffd247c1ff0 RDI: 000076fc2cbb6010
    RBP: 000076fc2cded010 R08: 00007ffd247c2210 R09: 00007ffd247c22a0
    R10: 000076fc29465470 R11: 0000000000000000 R12: 00007ffd247c1fc0
    R13: 000076fc2ce8e470 R14: 000076fc27ec9960 R15: 0000000000000414
    handlers:
    [<000000000d3fa913>] idma64_irq
    Disabling IRQ #27
    
    To avoid interrupt storm, set the device in reset state
    before bringing out the device from reset state.
    
    Changelog v2:
    - correct the subject line by adding "mfd: "
    Signed-off-by: default avatarBinbin Wu <binbin.wu@intel.com>
    Acked-by: default avatarMika Westerberg <mika.westerberg@linux.intel.com>
    Reviewed-by: default avatarAndy Shevchenko <andriy.shevchenko@linux.intel.com>
    Signed-off-by: default avatarLee Jones <lee.jones@linaro.org>
    dad06532
intel-lpss.c 13.6 KB