On Sat, April 20, 2024 5:29 AM, Bartosz Golaszewski wrote: > On Fri, 19 Apr 2024 at 09:04, Jiawen Wu <jiawenwu@xxxxxxxxxxxxxx> wrote: > > > > Hi Bartosz Golaszewski, > > > > I ran into a kernel crash problem when I pull the latest net-next.git, and > > finally it was found that is caused by this patch series merged. > > > > The kernel crashed because I got gpio=0 when I called irq_find_mapping() > > and then struct irq_data *d=null, as my driver describes: > > > > int gpio = irq_find_mapping(gc->irq.domain, hwirq); > > struct irq_data *d = irq_get_irq_data(gpio); > > > > txgbe_gpio_irq_ack(d); > > > > The deeper positioning is this line in __irq_resolve_mapping(). > > > > data = rcu_dereference(domain->revmap[hwirq]); > > > > So, is it the addition of SRCU infrastructure that causes this issue? > > > > This is irq-specific RCU that I did not add in the GPIO series. Please > provide us with more information. Bisect to the exact commit causing > the issue and post the kernel log (we don't know what kind of crash > you trigger and what the stack trace is). > > Bart > Hi Bartosz & Andy, Thanks for your replies. I'm sorry for the misunderstanding, and glad this patch doesn't cause any problems. I thought the issue was in this patch because of my mistake. It's actually caused by other patches. :)