Thread (43 messages) 43 messages, 5 authors, 2012-01-02

[PATCH 2/9] irq: check domain hwirq range for DT translate

From: Cousson, Benoit <hidden>
Date: 2011-12-19 15:22:31
Also in: linux-devicetree, lkml

On 12/19/2011 3:23 PM, Rob Herring wrote:
Benoit,

On 12/19/2011 06:41 AM, Cousson, Benoit wrote:
quoted
Hi Rob,

While trying your series to take advantage of the generic-irq domain
support for OMAP3 INTC, I realized that the following patch is breaking
drivers that are using irq_domain_add_simple.

The point is that irq_domain_add_simple does not populate hwirq_base or
nr_irq, so that test will always fail if the domain is created by the
irq_domain_add_simple API.

Adding an extra parameter to provide the nr_irq should fix that.

The long term fix should be to use the generic-irq for such driver, but
this is not the same effort, so it might worth fixing that API for the
moment.

Regards,
Benoit

On 12/14/2011 4:28 PM, Rob Herring wrote:
quoted
From: Rob Herring<redacted>

A DT node may have more than 1 domain associated with it, so make sure
the hwirq number is within range when doing DT translation.

Signed-off-by: Rob Herring<redacted>
Cc: Thomas Gleixner<redacted>
---
   kernel/irq/irqdomain.c |    3 +++
   1 files changed, 3 insertions(+), 0 deletions(-)
diff --git a/kernel/irq/irqdomain.c b/kernel/irq/irqdomain.c
index 200ce83..ae6441e 100644
--- a/kernel/irq/irqdomain.c
+++ b/kernel/irq/irqdomain.c
@@ -135,6 +135,9 @@ int irq_domain_simple_dt_translate(struct
irq_domain *d,
           return -EINVAL;
       if (intsize<   1)
           return -EINVAL;
+    if ((intspec[0]<   d->hwirq_base) ||
+        (intspec[0]>= d->hwirq_base + d->nr_irq))
I think this should work:

if (d->nr_irq&&  ((intspec[0]<  d->hwirq_base) ||
     (intspec[0]>= d->hwirq_base + d->nr_irq)))
Yes, indeed. It is even simpler that fixing the API.

I can now repost the OMAP3/4 series based on this series.

Thanks,
Benoit
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