https://github.com/torvalds/linux
Revision bc519d9574618e47a0c788000fb78da95e18d953 authored by Rob Herring on 03 May 2018, 18:09:44 UTC, committed by Mark Brown on 03 May 2018, 23:09:02 UTC
The BCM2835 AUX SPI has a shared interrupt line (with AUX UART). Downstream fixes this with an AUX irqchip to demux the IRQ sources and a DT change which breaks compatibility with older kernels. The AUX irqchip was already rejected for upstream[1] and the DT change would break working systems if the DTB is updated to a newer one. The latter issue was brought to my attention by Alex Graf. The root cause however is a bug in the shared handler. Shared handlers must check that interrupts are actually enabled before servicing the interrupt. Add a check that the TXEMPTY or IDLE interrupts are enabled. [1] https://patchwork.kernel.org/patch/9781221/ Cc: Alexander Graf <agraf@suse.de> Cc: Marc Zyngier <marc.zyngier@arm.com> Cc: Mark Brown <broonie@kernel.org> Cc: Eric Anholt <eric@anholt.net> Cc: Stefan Wahren <stefan.wahren@i2se.com> Cc: Florian Fainelli <f.fainelli@gmail.com> Cc: Ray Jui <rjui@broadcom.com> Cc: Scott Branden <sbranden@broadcom.com> Cc: bcm-kernel-feedback-list@broadcom.com Cc: linux-spi@vger.kernel.org Cc: linux-rpi-kernel@lists.infradead.org Cc: linux-arm-kernel@lists.infradead.org Signed-off-by: Rob Herring <robh@kernel.org> Reviewed-by: Eric Anholt <eric@anholt.net> Signed-off-by: Mark Brown <broonie@kernel.org>
1 parent 602805f
Tip revision: bc519d9574618e47a0c788000fb78da95e18d953 authored by Rob Herring on 03 May 2018, 18:09:44 UTC
spi: bcm2835aux: ensure interrupts are enabled for shared handler
spi: bcm2835aux: ensure interrupts are enabled for shared handler
Tip revision: bc519d9
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README | -rw-r--r-- | 800 bytes |
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