| Message ID | 20170413222731.5917-1-tyler.baker@linaro.org (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
On Thu, Apr 13 2017 at 11:27:31 pm BST, Tyler Baker <tyler.baker@linaro.org> wrote: > Call raw_spin_lock_init() before the spinlocks are used to prevent a > lockdep splat. > > Fixes the following trace: > > INFO: trying to register non-static key. > the code is fine but needs lockdep annotation. > turning off the locking correctness validator. > Hardware name: Freescale i.MX7 Dual (Device Tree) > Backtrace: > [<c010c364>] (dump_backtrace) from [<c010c610>] (show_stack+0x18/0x1c) > r7:00000000 r6:600000d3 r5:00000000 r4:c0e273dc > [<c010c5f8>] (show_stack) from [<c04070a4>] (dump_stack+0xb4/0xe8) > [<c0406ff0>] (dump_stack) from [<c0169e04>] (register_lock_class+0x208/0x5ec) > r9:ef00d010 r8:ef00d010 r7:c1606448 r6:00000000 r5:00000000 r4:ffffe000 > [<c0169bfc>] (register_lock_class) from [<c016da48>] > (__lock_acquire+0x7c/0x18d0) > r10:c0e0af40 r9:ef00d010 r8:c0e274cc r7:00000001 r6:600000d3 r5:c1606448 > r4:ffffe000 > [<c016d9cc>] (__lock_acquire) from [<c016fa4c>] (lock_acquire+0x70/0x90) > r10:00000000 r9:ef007e38 r8:00000001 r7:00000001 r6:600000d3 r5:00000000 > r4:ffffe000 > [<c016f9dc>] (lock_acquire) from [<c09accc8>] (_raw_spin_lock+0x30/0x40) > r8:600000d3 r7:ef007e10 r6:00000001 r5:ef007e10 r4:ef00d000 > [<c09acc98>] (_raw_spin_lock) from [<c04403a4>] (imx_gpcv2_irq_unmask+0x1c/0x5c) > r4:ef00d000 > [<c0440388>] (imx_gpcv2_irq_unmask) from [<c017e838>] (irq_enable+0x38/0x4c) > r5:00000000 r4:ef007e00 > [<c017e800>] (irq_enable) from [<c017e8d0>] (irq_startup+0x84/0x88) > r5:00000000 r4:ef007e00 > [<c017e84c>] (irq_startup) from [<c017cd7c>] (__setup_irq+0x538/0x5f4) > r7:ef007e60 r6:00000015 r5:ef007e00 r4:ef007d00 > [<c017c844>] (__setup_irq) from [<c017ce98>] (setup_irq+0x60/0xd0) > r10:c0d5fa48 r9:efffcbc0 r8:ef007d00 r7:00000015 r6:ef007e10 r5:00000000 > r4:ef007e00 > [<c017ce38>] (setup_irq) from [<c0d4dfdc>] (_mxc_timer_init+0x1f8/0x248) > r9:efffcbc0 r8:00000003 r7:016e3600 r6:c0c69bbc r5:ef007c40 r4:ef007c00 > [<c0d4dde4>] (_mxc_timer_init) from [<c0d4e0dc>] (mxc_timer_init_dt+0xb0/0xf8) > r7:00000000 r6:c1669e48 r5:ef7ebf7c r4:ef007c00 > [<c0d4e02c>] (mxc_timer_init_dt) from [<c0d4e168>] > (imx6dl_timer_init_dt+0x14/0x18) > r9:efffcbc0 r8:c0e7b000 r7:c0c695c0 r6:c0d6fe18 r5:00000001 r4:ef7ebf7c > [<c0d4e154>] (imx6dl_timer_init_dt) from [<c0d4d158>] > (clocksource_probe+0x54/0xb0) > [<c0d4d104>] (clocksource_probe) from [<c0d04a2c>] (time_init+0x30/0x38) > r7:c0e07900 r6:c0e7b000 r5:ffffffff r4:00000000 > [<c0d049fc>] (time_init) from [<c0d00bc8>] (start_kernel+0x220/0x3a0) > [<c0d009a8>] (start_kernel) from [<8000807c>] (0x8000807c) > r10:00000000 r9:410fc075 r8:8000406a r7:c0e0c958 r6:c0d5fa44 r5:c0e07918 > r4:c0e7b294 > > Verified the fix on a imx7d-cl-som with CONFIG_IMX_GPCV2 set. > > Signed-off-by: Tyler Baker <tyler.baker@linaro.org> > Reported-by: Tyler Baker <tyler.baker@linaro.org> > Reviewed-by: Fabio Estevam <fabio.estevam@nxp.com> > --- > Issue reported in this thread: https://lkml.org/lkml/2017/4/13/646 > > drivers/irqchip/irq-imx-gpcv2.c | 2 ++ > 1 file changed, 2 insertions(+) > > diff --git a/drivers/irqchip/irq-imx-gpcv2.c b/drivers/irqchip/irq-imx-gpcv2.c > index e13236f..9463f35 100644 > --- a/drivers/irqchip/irq-imx-gpcv2.c > +++ b/drivers/irqchip/irq-imx-gpcv2.c > @@ -230,6 +230,8 @@ static int __init imx_gpcv2_irqchip_init(struct device_node *node, > return -ENOMEM; > } > > + raw_spin_lock_init(&cd->rlock); > + > cd->gpc_base = of_iomap(node, 0); > if (!cd->gpc_base) { > pr_err("fsl-gpcv2: unable to map gpc registers\n"); Acked-by: Marc Zyngier <marc.zyngier@arm.com> Thomas, any chance you could take this as a fix through the tip tree? Thanks, M.
On Sat, 15 Apr 2017, Marc Zyngier wrote: > > Acked-by: Marc Zyngier <marc.zyngier@arm.com> > > Thomas, any chance you could take this as a fix through the tip tree? It's in Linus tree already :)
On Sat, Apr 15 2017 at 2:54:54 pm BST, Thomas Gleixner <tglx@linutronix.de> wrote: > On Sat, 15 Apr 2017, Marc Zyngier wrote: >> >> Acked-by: Marc Zyngier <marc.zyngier@arm.com> >> >> Thomas, any chance you could take this as a fix through the tip tree? > > It's in Linus tree already :) Ah, that's how you can tell I'm on holiday... ;-) M.
diff --git a/drivers/irqchip/irq-imx-gpcv2.c b/drivers/irqchip/irq-imx-gpcv2.c index e13236f..9463f35 100644 --- a/drivers/irqchip/irq-imx-gpcv2.c +++ b/drivers/irqchip/irq-imx-gpcv2.c @@ -230,6 +230,8 @@ static int __init imx_gpcv2_irqchip_init(struct device_node *node, return -ENOMEM; } + raw_spin_lock_init(&cd->rlock); + cd->gpc_base = of_iomap(node, 0); if (!cd->gpc_base) { pr_err("fsl-gpcv2: unable to map gpc registers\n");