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| author | Álvaro Fernández Rojas <noltari@gmail.com> | 2017-02-07 21:07:54 +0100 |
|---|---|---|
| committer | Álvaro Fernández Rojas <noltari@gmail.com> | 2017-02-07 23:00:16 +0100 |
| commit | 96aa0c6b0b179518e0c228362ea55f1c7793bb3a (patch) | |
| tree | 3244114239a7bbf380ee9fa76680b55e459e06c0 /target/linux/brcm2708/patches-4.9/0006-irq-bcm2836-Prevent-spurious-interrupts-and-trap-the.patch | |
| parent | 6b5c3fd055f64ce0f9d111820123caf33632a51f (diff) | |
| download | upstream-96aa0c6b0b179518e0c228362ea55f1c7793bb3a.tar.gz upstream-96aa0c6b0b179518e0c228362ea55f1c7793bb3a.tar.bz2 upstream-96aa0c6b0b179518e0c228362ea55f1c7793bb3a.zip | |
brcm2708: add linux 4.9 support
Patches from Raspberry Pi repo:
https://github.com/raspberrypi/linux/commits/rpi-4.9.y
Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
Diffstat (limited to 'target/linux/brcm2708/patches-4.9/0006-irq-bcm2836-Prevent-spurious-interrupts-and-trap-the.patch')
| -rw-r--r-- | target/linux/brcm2708/patches-4.9/0006-irq-bcm2836-Prevent-spurious-interrupts-and-trap-the.patch | 26 |
1 files changed, 26 insertions, 0 deletions
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 <phil@raspberrypi.org> +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) { |