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Subject: Re: BBB/I2C: Using ioctl(I2CRDWR) warns: interrupt storm detected
 on "intr70:"
From: Ian Lepore <ian@FreeBSD.org>
To: Winston Smith <smith.winston.101@gmail.com>
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Date: Thu, 01 May 2014 17:40:01 -0600
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On Thu, 2014-05-01 at 13:12 -0400, Winston Smith wrote:
> Continuing on with working with the I2C interface on the BBB I wrote a
> utility to read the BBB's 28 byte system EEPROM on iic0, address 0x50
> which contains the model and serial numbers.  See pastebin here:
> 
> http://pastebin.com/p7XwKUGZ
> 
> However, when I run the utility:
> 
> root@beaglebone:~ # ./bbb_eeprom
> Read from slave 50 on /dev/iic0, signature=AA:55:33:EE
> Model:  A335BNLT0A6A
> Serial: 0214BBBK4321
> 
> 
> I see the following warning on the console:
> 
> interrupt storm detected on "intr70:"; throttling interrupt source
> 
> 
> Does this mean anything, or is it just a spurious warning.
> 

Nope, that's not spurious, that's a real problem, usually it's a driver
bug.

-- Ian