On Mon, Jul 27, 2015 at 03:26:57PM +0530, Sudip Mukherjee wrote:
> On Mon, Jul 27, 2015 at 04:10:29PM +0800, Navy Cheng wrote:
> > The work flow of dgnc_init_module() is base on if statment. Here is a
> > nest "if" in the function.
> >
> > To avoid the nest if statment, make the code easier to understand and
> > make the codingstyle to be identical with others, add "end" label to
> > dgnc_init_module() and use goto to control the work flow.
> >
> > Signed-off-by: Navy Cheng <nav...@126.com>
> > ---
> Dan Carpenter has explained very beautifully why we should not handle
> the success and why error values should be handled. You can see his mail
> at: http://www.spinics.net/lists/linux-driver-devel/msg68202.html
>
> Then maybe the following might be a better idea:
>
> diff --git a/drivers/staging/dgnc/dgnc_driver.c
> b/drivers/staging/dgnc/dgnc_driver.c
> index 7546aff..b8fa86c 100644
> --- a/drivers/staging/dgnc/dgnc_driver.c
> +++ b/drivers/staging/dgnc/dgnc_driver.c
> @@ -189,18 +189,20 @@ static int __init dgnc_init_module(void)
> /*
> * If something went wrong in the scan, bail out of driver.
> */
> - if (rc < 0) {
> - /* Only unregister if it was actually registered. */
> - if (dgnc_NumBoards)
> - pci_unregister_driver(&dgnc_driver);
> - else
> - pr_warn("WARNING: dgnc driver load failed. No Digi Neo
> or Classic boards found.\n");
Hi,Sudip
What we have done seems like this:
Mine: Yours:
Entry Entry
| |
| |
Judge--success Judge--fail
| | | |
| | | |
Err Handing | Exit 1 |
| | |
| | Err Handing
Exit------+ |
Exit 2
I think it's hard to say which one its beter. Actually, the original version
seems good in that situation. I'm kernelnewbie and just practice to send patch.
Thanks for your reply.
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