From 96aa0c6b0b179518e0c228362ea55f1c7793bb3a Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?=C3=81lvaro=20Fern=C3=A1ndez=20Rojas?= Date: Tue, 7 Feb 2017 21:07:54 +0100 Subject: brcm2708: add linux 4.9 support MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Patches from Raspberry Pi repo: https://github.com/raspberrypi/linux/commits/rpi-4.9.y Signed-off-by: Álvaro Fernández Rojas --- ...-Prevent-spurious-interrupts-and-trap-the.patch | 26 ++++++++++++++++++++++ 1 file changed, 26 insertions(+) create mode 100644 target/linux/brcm2708/patches-4.9/0006-irq-bcm2836-Prevent-spurious-interrupts-and-trap-the.patch (limited to 'target/linux/brcm2708/patches-4.9/0006-irq-bcm2836-Prevent-spurious-interrupts-and-trap-the.patch') diff --git a/target/linux/brcm2708/patches-4.9/0006-irq-bcm2836-Prevent-spurious-interrupts-and-trap-the.patch b/target/linux/brcm2708/patches-4.9/0006-irq-bcm2836-Prevent-spurious-interrupts-and-trap-the.patch new file mode 100644 index 0000000000..3ebcb0a45f --- /dev/null +++ b/target/linux/brcm2708/patches-4.9/0006-irq-bcm2836-Prevent-spurious-interrupts-and-trap-the.patch @@ -0,0 +1,26 @@ +From 3fad09910dafeb93a351aefa90ca4fd490f68c84 Mon Sep 17 00:00:00 2001 +From: Phil Elwell +Date: Fri, 4 Dec 2015 17:41:50 +0000 +Subject: [PATCH] irq-bcm2836: Prevent spurious interrupts, and trap them early + +The old arch-specific IRQ macros included a dsb to ensure the +write to clear the mailbox interrupt completed before returning +from the interrupt. The BCM2836 irqchip driver needs the same +precaution to avoid spurious interrupts. + +Spurious interrupts are still possible for other reasons, +though, so trap them early. +--- + drivers/irqchip/irq-bcm2836.c | 1 + + 1 file changed, 1 insertion(+) + +--- a/drivers/irqchip/irq-bcm2836.c ++++ b/drivers/irqchip/irq-bcm2836.c +@@ -175,6 +175,7 @@ __exception_irq_entry bcm2836_arm_irqchi + u32 ipi = ffs(mbox_val) - 1; + + writel(1 << ipi, mailbox0); ++ dsb(sy); + handle_IPI(ipi, regs); + #endif + } else if (stat) { -- cgit v1.2.3