On Wed, Apr 08, 2015 at 04:50:38PM +0530, Sudip Mukherjee wrote: > now that we are monitoring the return value from attach, make the > required changes to return proper value from its attach function. > > Signed-off-by: Sudip Mukherjee <[email protected]> > --- > drivers/i2c/busses/i2c-parport.c | 7 ++++--- > 1 file changed, 4 insertions(+), 3 deletions(-) > > diff --git a/drivers/i2c/busses/i2c-parport.c > b/drivers/i2c/busses/i2c-parport.c > index a1fac5a..761a775 100644 > --- a/drivers/i2c/busses/i2c-parport.c > +++ b/drivers/i2c/busses/i2c-parport.c > @@ -160,14 +160,14 @@ static void i2c_parport_irq(void *data) > "SMBus alert received but no ARA client!\n"); > } > > -static void i2c_parport_attach(struct parport *port) > +static int i2c_parport_attach(struct parport *port) > { > struct i2c_par *adapter; > > adapter = kzalloc(sizeof(struct i2c_par), GFP_KERNEL); > if (adapter == NULL) { > printk(KERN_ERR "i2c-parport: Failed to kzalloc\n"); > - return; > + return -ENOMEM;
ENOMEM does not need printout. Please remove printk while we are here.
>
> pr_debug("i2c-parport: attaching to %s\n", port->name);
> @@ -230,13 +230,14 @@ static void i2c_parport_attach(struct parport *port)
> mutex_lock(&adapter_list_lock);
> list_add_tail(&adapter->node, &adapter_list);
> mutex_unlock(&adapter_list_lock);
> - return;
> + return 0;
>
> err_unregister:
> parport_release(adapter->pdev);
> parport_unregister_device(adapter->pdev);
> err_free:
> kfree(adapter);
> + return -ENODEV;
Ideally, we would return different -Esomething for each failing case. We
can leave that for someone who is acutally using the driver. However, I
wonder if ENODEV is a proper catch-all case because the driver core will
not report failures.
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