9787f8390f
Backport r42678 Signed-off-by: Florian Fainelli <florian@openwrt.org> git-svn-id: svn://svn.openwrt.org/openwrt/branches/barrier_breaker@42682 3c298f89-4303-0410-b956-a3cf2f4a3e73
36 lines
1 KiB
Diff
36 lines
1 KiB
Diff
From ed5a728f2593fbd3950c5c17ab7143bafc295e57 Mon Sep 17 00:00:00 2001
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From: popcornmix <popcornmix@gmail.com>
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Date: Thu, 13 Jun 2013 16:46:54 +0100
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Subject: [PATCH 067/196] Avoid responding to unexpected I2C interrupts
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---
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drivers/i2c/busses/i2c-bcm2708.c | 6 ++++++
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1 file changed, 6 insertions(+)
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diff --git a/drivers/i2c/busses/i2c-bcm2708.c b/drivers/i2c/busses/i2c-bcm2708.c
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index edc90c0..33f4e7d 100644
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--- a/drivers/i2c/busses/i2c-bcm2708.c
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+++ b/drivers/i2c/busses/i2c-bcm2708.c
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@@ -175,6 +175,11 @@ static irqreturn_t bcm2708_i2c_interrupt(int irq, void *dev_id)
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spin_lock(&bi->lock);
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+ /* we may see camera interrupts on the "other" I2C channel
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+ Just return if we've not sent anything */
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+ if (!bi->nmsgs || !bi->msg )
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+ goto early_exit;
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+
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s = bcm2708_rd(bi, BSC_S);
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if (s & (BSC_S_CLKT | BSC_S_ERR)) {
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@@ -208,6 +213,7 @@ static irqreturn_t bcm2708_i2c_interrupt(int irq, void *dev_id)
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handled = false;
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}
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+early_exit:
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spin_unlock(&bi->lock);
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return handled ? IRQ_HANDLED : IRQ_NONE;
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--
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1.9.1
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