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L4lx: make block stub driver SMP safe (fix #514)

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We have to take the block queue's spin lock before invoking the interrupt
routine, otherwise the AVL tree og Genode's block packet stream gets
corrupted.
This commit is contained in:
Stefan Kalkowski 2012-12-06 15:21:02 +01:00 committed by Norman Feske
parent 240f1e334f
commit f61ecb1053
1 changed files with 4 additions and 1 deletions
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5
ports-foc/src/drivers/genode_block.c
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@ -141,7 +141,7 @@ genode_end_request(void *request, short write,
}
}
blk_end_request_all(req, 0);
__blk_end_request_all(req, 0);
if (dev->stopped) {
dev->stopped = 0;
@ -173,8 +173,11 @@ static struct block_device_operations genode_blk_ops = {
static irqreturn_t event_interrupt(int irq, void *data)
{
unsigned long flags;
struct genode_blk_device *dev = (struct genode_blk_device *)data;
spin_lock_irqsave(dev->queue->queue_lock, flags);
genode_block_collect_responses(dev->idx);
spin_unlock_irqrestore(dev->queue->queue_lock, flags);
return IRQ_HANDLED;
}