Em Mon, 15 Oct 2012 13:13:44 +0200
Matthijs Kooijman <matth...@stdin.nl> escreveu:
> This makes the cleanup on probe failure more consistent with other
> drivers. This is similar to what commit
> f27b853ea24a9b70585f9251384d97929e6551c3 ("[media] rc: Fix invalid
> free_region and/or free_irq on probe failure") did for some other
> drivers.
>
> In addition to making the cleanup more consistent, this also fixes a
> case where (on a ene_hw_detect failure) free_region would be called on a
> region that was not requested yet.
>
> This last problem was probably introduced by the moving of code in
> commit b31b021988fed9e3741a46918f14ba9b063811db ("[media] ene_ir: Fix
> driver initialisation") and commit
> 9ef449c6b31bb6a8e6dedc24de475a3b8c79be20 ("[media] rc: Postpone ISR
> registration").
Please, always c/c the driver maintainer (Maxim Levitsky
<maximlevit...@gmail.com>).
Maxim,
Please review.
Regards,
Mauro
>
> Signed-off-by: Matthijs Kooijman <matth...@stdin.nl>
> ---
> drivers/media/rc/ene_ir.c | 29 +++++++++++++----------------
> 1 file changed, 13 insertions(+), 16 deletions(-)
>
> diff --git a/drivers/media/rc/ene_ir.c b/drivers/media/rc/ene_ir.c
> index 647dd95..62f9076 100644
> --- a/drivers/media/rc/ene_ir.c
> +++ b/drivers/media/rc/ene_ir.c
> @@ -1000,7 +1000,7 @@ static int ene_probe(struct pnp_dev *pnp_dev, const
> struct pnp_device_id *id)
> dev = kzalloc(sizeof(struct ene_device), GFP_KERNEL);
> rdev = rc_allocate_device();
> if (!dev || !rdev)
> - goto error1;
> + goto failure;
>
> /* validate resources */
> error = -ENODEV;
> @@ -1011,10 +1011,10 @@ static int ene_probe(struct pnp_dev *pnp_dev, const
> struct pnp_device_id *id)
>
> if (!pnp_port_valid(pnp_dev, 0) ||
> pnp_port_len(pnp_dev, 0) < ENE_IO_SIZE)
> - goto error;
> + goto failure;
>
> if (!pnp_irq_valid(pnp_dev, 0))
> - goto error;
> + goto failure;
>
> spin_lock_init(&dev->hw_lock);
>
> @@ -1030,7 +1030,7 @@ static int ene_probe(struct pnp_dev *pnp_dev, const
> struct pnp_device_id *id)
> /* detect hardware version and features */
> error = ene_hw_detect(dev);
> if (error)
> - goto error;
> + goto failure;
>
> if (!dev->hw_learning_and_tx_capable && txsim) {
> dev->hw_learning_and_tx_capable = true;
> @@ -1075,30 +1075,27 @@ static int ene_probe(struct pnp_dev *pnp_dev, const
> struct pnp_device_id *id)
> /* claim the resources */
> error = -EBUSY;
> if (!request_region(dev->hw_io, ENE_IO_SIZE, ENE_DRIVER_NAME)) {
> - dev->hw_io = -1;
> - dev->irq = -1;
> - goto error;
> + goto failure;
> }
>
> dev->irq = pnp_irq(pnp_dev, 0);
> if (request_irq(dev->irq, ene_isr,
> IRQF_SHARED, ENE_DRIVER_NAME, (void *)dev)) {
> - dev->irq = -1;
> - goto error;
> + goto failure2;
> }
>
> error = rc_register_device(rdev);
> if (error < 0)
> - goto error;
> + goto failure3;
>
> pr_notice("driver has been successfully loaded\n");
> return 0;
> -error:
> - if (dev && dev->irq >= 0)
> - free_irq(dev->irq, dev);
> - if (dev && dev->hw_io >= 0)
> - release_region(dev->hw_io, ENE_IO_SIZE);
> -error1:
> +
> +failure3:
> + free_irq(dev->irq, dev);
> +failure2:
> + release_region(dev->hw_io, ENE_IO_SIZE);
> +failure:
> rc_free_device(rdev);
> kfree(dev);
> return error;
Cheers,
Mauro
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