linux-kernel - Re: [PATCH 2/6] mfd: cros_ec: free IRQ automatically

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Date:   Wed, 7 Mar 2018 15:18:02 +0000
From:   Lee Jones <lee.jones@...aro.org>
To:     Enric Balletbo Serra <eballetbo@...il.com>
Cc:     Vincent Palatin <vpalatin@...omium.org>,
        Enric Balletbo i Serra <enric.balletbo@...labora.com>,
        Guenter Roeck <groeck@...omium.org>,
        Gwendal Grignou <gwendal@...omium.org>,
        Benson Leung <bleung@...omium.org>,
        LKML <linux-kernel@...r.kernel.org>, kernel@...labora.com
Subject: Re: [PATCH 2/6] mfd: cros_ec: free IRQ automatically

On Tue, 20 Feb 2018, Enric Balletbo Serra wrote:

> Hi Vincent,
> 
> 2018-02-20 9:00 GMT+01:00 Vincent Palatin <vpalatin@...omium.org>:
> > On Mon, Feb 19, 2018 at 11:40 PM, Enric Balletbo i Serra
> > <enric.balletbo@...labora.com> wrote:
> >> From: Vincent Palatin <vpalatin@...omium.org>
> >>
> >> Free the IRQ we might have requested when removing the cros_ec device,
> >> so we can unload and reload the driver properly.
> >>
> >> Signed-off-by: Vincent Palatin <vpalatin@...omium.org>
> >> Signed-off-by: Enric Balletbo i Serra <enric.balletbo@...labora.com>
> >> ---
> >>  drivers/mfd/cros_ec.c | 17 ++++++-----------
> >>  1 file changed, 6 insertions(+), 11 deletions(-)
> >>
> >> diff --git a/drivers/mfd/cros_ec.c b/drivers/mfd/cros_ec.c
> >> index 74780f2964a1..d1a4fbee9380 100644
> >> --- a/drivers/mfd/cros_ec.c
> >> +++ b/drivers/mfd/cros_ec.c
> >> @@ -119,9 +119,9 @@ int cros_ec_register(struct cros_ec_device *ec_dev)
> >>         }
> >>
> >>         if (ec_dev->irq) {
> >> -               err = request_threaded_irq(ec_dev->irq, NULL, ec_irq_thread,
> >> -                                          IRQF_TRIGGER_LOW | IRQF_ONESHOT,
> >> -                                          "chromeos-ec", ec_dev);
> >> +               err = devm_request_threaded_irq(dev, ec_dev->irq, NULL,
> >> +                               ec_irq_thread, IRQF_TRIGGER_LOW | IRQF_ONESHOT,
> >> +                               "chromeos-ec", ec_dev);
> >>                 if (err) {
> >>                         dev_err(dev, "Failed to request IRQ %d: %d",
> >>                                 ec_dev->irq, err);
> >> @@ -135,7 +135,7 @@ int cros_ec_register(struct cros_ec_device *ec_dev)
> >>                 dev_err(dev,
> >>                         "Failed to register Embedded Controller subdevice %d\n",
> >>                         err);
> >> -               goto fail_mfd;
> >> +               return err;
> >>         }
> >>
> >>         if (ec_dev->max_passthru) {
> >> @@ -153,7 +153,7 @@ int cros_ec_register(struct cros_ec_device *ec_dev)
> >>                         dev_err(dev,
> >>                                 "Failed to register Power Delivery subdevice %d\n",
> >>                                 err);
> >> -                       goto fail_mfd;
> >> +                       return err;
> >>                 }
> >>         }
> >>
> >> @@ -162,7 +162,7 @@ int cros_ec_register(struct cros_ec_device *ec_dev)
> >>                 if (err) {
> >>                         mfd_remove_devices(dev);
> >>                         dev_err(dev, "Failed to register sub-devices\n");
> >> -                       goto fail_mfd;
> >> +                       return err;
> >>                 }
> >>         }
> >>
> >> @@ -180,11 +180,6 @@ int cros_ec_register(struct cros_ec_device *ec_dev)
> >>         cros_ec_acpi_install_gpe_handler(dev);
> >>
> >>         return 0;
> >> -
> >> -fail_mfd:
> >> -       if (ec_dev->irq)
> >> -               free_irq(ec_dev->irq, ec_dev);
> >> -       return err;
> >>  }
> >>  EXPORT_SYMBOL(cros_ec_register);
> >
> >
> > You need to remove the "free_irq(ec_dev->irq, ec_dev);" in cros_ec_remove() too.
> > as done there:
> > https://chromium-review.googlesource.com/c/chromiumos/third_party/kernel/+/866858/15/drivers/mfd/cros_ec.c
> >
> > it was missing originally but was added by: 'f58b14e6632a mfd:
> > cros_ec: Free IRQ on exit'
> >
> 
> Many thanks to catch this. I'll wait a bit more for if I receive more
> feedback on the other patches and send a second version of this
> patchset.

Hmm... rather than mess around any further with this set, would you be
kind enough to pull all of the patches back into a single set and send
them out threaded with a cover-letter please?

I'm also going to un-apply 1/6 for completeness.

-- 
Lee Jones
Linaro Services Technical Lead
Linaro.org │ Open source software for ARM SoCs
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