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author | Marc Zyngier <marc.zyngier@arm.com> | 2017-08-18 09:53:45 (GMT) |
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committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-08-25 00:12:20 (GMT) |
commit | 762ac49ccecece82aad47bb4bd661791fafac2e5 (patch) | |
tree | 729564ea9b3474d4a8127a6b96ac4c367949199c /kernel/irq/ipi.c | |
parent | 4691f1ca6fad3877a4887041d1ad5eb58117b4a2 (diff) | |
download | linux-762ac49ccecece82aad47bb4bd661791fafac2e5.tar.xz |
genirq: Restore trigger settings in irq_modify_status()
commit e8f241893dfbbebe2813c01eac54f263e6a5e59c upstream.
irq_modify_status starts by clearing the trigger settings from
irq_data before applying the new settings, but doesn't restore them,
leaving them to IRQ_TYPE_NONE.
That's pretty confusing to the potential request_irq() that could
follow. Instead, snapshot the settings before clearing them, and restore
them if the irq_modify_status() invocation was not changing the trigger.
Fixes: 1e2a7d78499e ("irqdomain: Don't set type when mapping an IRQ")
Reported-and-tested-by: jeffy <jeffy.chen@rock-chips.com>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Jon Hunter <jonathanh@nvidia.com>
Link: http://lkml.kernel.org/r/20170818095345.12378-1-marc.zyngier@arm.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'kernel/irq/ipi.c')
0 files changed, 0 insertions, 0 deletions