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    Subject[PATCH 3/3] ARM: at91: pm: fallback to slowclock when backup mode fails
    Date
    If the backup sram allocation fails, ensure we can suspend by falling back
    to the usual slow clock mode.

    Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
    ---
    arch/arm/mach-at91/pm.c | 12 +++++++++---
    1 file changed, 9 insertions(+), 3 deletions(-)

    diff --git a/arch/arm/mach-at91/pm.c b/arch/arm/mach-at91/pm.c
    index d08f032f9d94..02823d8f3ada 100644
    --- a/arch/arm/mach-at91/pm.c
    +++ b/arch/arm/mach-at91/pm.c
    @@ -519,24 +519,30 @@ static void __init at91_pm_bu_sram_init(void)

    if (!pdev) {
    pr_warn("%s: failed to find securam device!\n", __func__);
    - return;
    + goto fallback;
    }

    sram_pool = gen_pool_get(&pdev->dev, NULL);
    if (!sram_pool) {
    pr_warn("%s: securam pool unavailable!\n", __func__);
    - return;
    + goto fallback;
    }

    pm_bu = (void *)gen_pool_alloc(sram_pool, sizeof(struct at91_pm_bu));
    if (!pm_bu) {
    pr_warn("%s: unable to alloc securam!\n", __func__);
    - return;
    + goto fallback;
    }

    pm_bu->suspended = 0;
    pm_bu->canary = virt_to_phys(&canary);
    pm_bu->resume = virt_to_phys(cpu_resume);
    +
    +fallback:
    + if (pm_data.standby_mode == AT91_PM_BACKUP)
    + pm_data.standby_mode = AT91_PM_SLOW_CLOCK;
    + if (pm_data.suspend_mode != AT91_PM_BACKUP)
    + pm_data.suspend_mode = AT91_PM_SLOW_CLOCK;
    }

    struct pmc_info {
    --
    2.11.0
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