On Mon, 2016-11-07 at 03:38:57 UTC, Sam Mendoza-Jonas wrote: > Commit 2def86a7200c > ("hvc: Convert to using interrupts instead of opal events") > enabled the use of interrupts in the hvc_driver for OPAL platforms. > However on machines with more than one hvc console, any console after > the first will fail to register an interrupt handler in > notifier_add_irq() since all consoles share the same IRQ number but do > not set the IRQF_SHARED flag: > > [ 51.179907] genirq: Flags mismatch irq 31. 00000000 (hvc_console) vs. > 00000000 (hvc_console) > [ 51.180010] hvc_open: request_irq failed with rc -16. > > This error propagates up to hvc_open() and the console is closed, but > OPAL will still generate interrupts that are not handled, leading to > rcu_sched stall warnings. > > Set IRQF_SHARED when calling request_irq, allowing additional consoles > to start properly. This is only set for consoles handled by > hvc_opal_probe(), leaving other types unaffected. > > Signed-off-by: Samuel Mendoza-Jonas <sam@xxxxxxxxxxxxxxxx> > Acked-by: Michael Ellerman <mpe@xxxxxxxxxxxxxx> Applied to powerpc next, thanks. https://git.kernel.org/powerpc/c/bbc3dfe8805de86874b1a1b142 cheers -- To unsubscribe from this list: send the line "unsubscribe stable" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html