Re: [PATCH] fix bogus use of rc = alloc_chrdev_region()
From: Jim Cromie
Date: Fri Jun 10 2011 - 16:30:22 EST
can someone pick this up,
for this release or next ?
On Thu, Jun 2, 2011 at 11:38 PM, Jim Cromie <jim.cromie@xxxxxxxxx> wrote:
> Robert P.J. Day noticed a bogus assignment: major = rc, after
> the call to alloc_chrdev_region() in pc8736x_gpio_init().
>
> The code as written expects return-code behavior as for
> register_chrdev(), ie on success: rc = reserved-major when
> requested-major = 0. But for alloc_chrdev_region(), this isnt the
> case. Since its used for debug printing only, just excise the mess.
>
> Signed-of-by: Jim Cromie <jim.cromie@xxxxxxxxx>
> Reported-by: Robert P.J. Day <rpjday@xxxxxxxxxxxxxx>
> cc: Greg KH <greg@xxxxxxxxxx
> Signed-off-by: Jim Cromie <jim.cromie@xxxxxxxxx>
> ---
> drivers/char/pc8736x_gpio.c | 5 +----
> 1 files changed, 1 insertions(+), 4 deletions(-)
>
> diff --git a/drivers/char/pc8736x_gpio.c b/drivers/char/pc8736x_gpio.c
> index b304ec0..30d92fe 100644
> --- a/drivers/char/pc8736x_gpio.c
> +++ b/drivers/char/pc8736x_gpio.c
> @@ -314,10 +314,7 @@ static int __init pc8736x_gpio_init(void)
> dev_err(&pdev->dev, "register-chrdev failed: %d\n", rc);
> goto undo_request_region;
> }
> - if (!major) {
> - major = rc;
> - dev_dbg(&pdev->dev, "got dynamic major %d\n", major);
> - }
> + dev_dbg(&pdev->dev, "using chardev major %d\n", major);
>
> pc8736x_init_shadow();
>
> --
> 1.7.4.2
>
>
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