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PTR_ERR(NULL) returns 0 so current code returns 0 if ioremap fails, fix it.
Signed-off-by: Axel Lin <axel.lin@ingics.com>
Reviewed-by: Matthias Brugger <matthias.bgg@gmail.com>
Cc: Yingjoe Chen <yingjoe.chen@mediatek.com>
Cc: linux-mediatek@lists.infradead.org <linux-mediatek@lists.infradead.org>
Cc: Jason Cooper <jason@lakedaemon.net>
Link: http://lkml.kernel.org/r/1432220254.29544.1.camel@ingics.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Originally mtk-sysirq hardcoded supported irq number to 224. This
was fine since all SoCs before support the same number of irqs for
intpol.
However MT8173 intpol support 32 more irq pins, changes to get
irq number from register resource size to suppor MT8173 properly.
Signed-off-by: Yingjoe Chen <yingjoe.chen@mediatek.com>
Signed-off-by: Eddie Huang <eddie.huang@mediatek.com>
Cc: <srv_heupstream@mediatek.com>
Cc: Pawel Moll <pawel.moll@arm.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Ian Campbell <ijc+devicetree@hellion.org.uk>
Cc: Kumar Gala <galak@codeaurora.org>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will.deacon@arm.com>
Cc: Olof Johansson <olof@lixom.net>
Cc: Robert Richter <rrichter@cavium.com>
Cc: Mark Brown <broonie@linaro.org>
Cc: <linux-arm-kernel@lists.infradead.org>
Cc: Sascha Hauer <kernel@pengutronix.de>
Cc: <marc.zyngier@arm.com>
Cc: <peter.maydell@linaro.org>
Cc: Matthias Brugger <matthias.bgg@gmail.com>
Cc: Rob Herring <robh+dt@kernel.org>
Cc: Jason Cooper <jason@lakedaemon.net>
Link: http://lkml.kernel.org/r/1421054073-43468-3-git-send-email-eddie.huang@mediatek.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Beniamino noticed a bug that an invalid DT file for the mediatek interrupt
polarity extension will cause kernel oops.
The reason is that the interrupt polarity support for mediatek chips
merely checks for NULL pointer instead of a casted error return
value in mtk_sysirq_of_init() so any other casted error value passes
the NULL pointer check and causes a kernel panic when dereferenced.
Use IS_ERR() and return the error value via PTR_ERR().
[ jac: took V2 over V3 for diff formatting, hand-added V3 changes,
tweaked subject line. ]
Reported-by: Beniamino Galvani <b.galvani@gmail.com>
Signed-off-by: Yingjoe Chen <yingjoe.chen@mediatek.com>
Link: https://lkml.kernel.org/r/1418205302-22531-1-git-send-email-yingjoe.chen@mediatek.com
Signed-off-by: Jason Cooper <jason@lakedaemon.net>
Mediatek SoCs have interrupt polarity support in sysirq which
allows to invert polarity for given interrupt. Add this support
using hierarchy irq domain.
Signed-off-by: Yingjoe Chen <yingjoe.chen@mediatek.com>
Link: https://lkml.kernel.org/r/1416902662-19281-3-git-send-email-yingjoe.chen@mediatek.com
Signed-off-by: Jason Cooper <jason@lakedaemon.net>
