For this version of GIC codes, kernel assumes that all the interrupt status of GIC is inactive. So the kernel does not check this when booting.
This is no problem on must sitations. But when kdump is deplayed. And a panic occurs when an interrupt is being handled (may be PPI ). We have no chance to write relative bit to GICC_EOIR. So this interrupt remains active. And GIC will not deliver this type interrupt to cpu interface. And the capture kernel may fail to boot becase of lacking of certain interrupt (such as timer interupt). I have test this patch on arma9el(GIC v1), arma15el and arma15eb(GIC v2) platforms. And the tests passed. changes from V1: - used for_each_set_bit instead of find_next_bit - removed the GIC version indentifying codes. - used one way to inactive GIC interupt states for all GIC version Liu Hua (1): GIC: introduce method to deactive interupts drivers/irqchip/irq-gic.c | 26 ++++++++++++++++++++++++++ 1 file changed, 26 insertions(+) -- 1.9.0 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
