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    Subject[PATCH v3 19/37] ARM: davinci: aintc: request memory region before remapping it
    Date
    From: Bartosz Golaszewski <bgolaszewski@baylibre.com>

    Add a missing call to request_mem_region() before calling ioremap() to
    make sure the region is not being used by anyone else.

    Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
    ---
    arch/arm/mach-davinci/irq.c | 9 +++++++++
    1 file changed, 9 insertions(+)

    diff --git a/arch/arm/mach-davinci/irq.c b/arch/arm/mach-davinci/irq.c
    index 2afaf19dc46c..2b6943731af9 100644
    --- a/arch/arm/mach-davinci/irq.c
    +++ b/arch/arm/mach-davinci/irq.c
    @@ -86,9 +86,18 @@ davinci_aintc_handle_irq(struct pt_regs *regs)
    void __init davinci_aintc_init(const struct davinci_aintc_config *config)
    {
    unsigned int irq_off, reg_off, prio, shift;
    + void __iomem *req;
    int ret, irq_base;
    const u8 *prios;

    + req = request_mem_region(config->reg.start,
    + resource_size(&config->reg),
    + "davinci-cp-intc");
    + if (!req) {
    + pr_err("%s: register range busy\n", __func__);
    + return;
    + }
    +
    davinci_aintc_base = ioremap(config->reg.start,
    resource_size(&config->reg));
    if (!davinci_aintc_base) {
    --
    2.20.1
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