BBB/I2C: Using ioctl(I2CRDWR) warns: interrupt storm detected on "intr70:"

[Ian Lepore]

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 at 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