On Sun, Sep 18, 2016 at 06:52:31PM +0800, Yadi Hu wrote: > From: "Yadi.hu" <yadi.hu@xxxxxxxxxxxxx> > > the eg20t driver call request_irq() function before the pch_base_address, > base address of i2c controller's register, is assigned an effective value. > > there is one possible scenario that an interrupt which isn't inside eg20t > arrives immediately after request_irq() is executed when i2c controller > shares an interrupt number with others. since the interrupt handler > pch_i2c_handler() has already active as shared action, it will be called > and read its own register to determine if this interrupt is from itself. > > At that moment, since base address of i2c registers is not remapped > in kernel space yet,so the INT handler will access an illegal address > and then a error occurs. > > Signed-off-by: Yadi.hu <yadi.hu@xxxxxxxxxxxxx> Applied to for-next, thanks! Please make sure "V3" also appears in the patch subject since patch management tools pick this up. "-v <nr>" in recent git versions makes this super easy.
Attachment:
signature.asc
Description: PGP signature
