Re: [PATCH] PCI: dwc: Fix a 64bit bug in dw_pcie_ep_raise_msix_irq()

From: Dan Carpenter
Date: Fri Jan 19 2024 - 03:26:05 EST


On Wed, Jan 17, 2024 at 09:21:41PM +0000, Niklas Cassel wrote:
> Hello Dan,
>
> On Wed, Jan 17, 2024 at 09:32:08PM +0300, Dan Carpenter wrote:
> > The "msg_addr" variable is u64. However, the "tbl_offset" is an unsigned
>
> Here you write tbl_offset.
>
> > int. This means that when the code does
> >
> > msg_addr &= ~aligned_offset;
> >
> > it will unintentionally zero out the high 32 bits. Declare "tbl_offset"
>
> Here you also write tbl_offset.
>

That's so weird... I can't imagine how that happened. Do you think it
could be a Welsh mice situation where forest creatures are changing my
work when I'm away from my desk? https://www.youtube.com/shorts/h8gkIbtaaek

Fixed in v2. Thanks!

regards,
dan carpenter