On Fri, 2010-10-22 at 04:23 +0800, Myron Stowe wrote: > ACPI's system event related IRQ handing accesses specific fixed > hardware registers; namely PM1a event, PM1b event, GPE0, and GPE1 > which are declared in the FADT. If these registers are backed by > MMIO, as opposed to I/O port space, accessing them within interrupt > context will incur a panic since acpi_read() and acpi_write() end up > calling ioremap(), which may block to allocate memory - BZ 18012. since you just access several bytes mmio in interrupt context, can't you use kmap_atomic_pfn() here? -- To unsubscribe from this list: send the line "unsubscribe linux-acpi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
