linux-kernel - Re: [PATCH 04/26] Staging: fbtft: flexfb: Switch to the gpio descriptor interface

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Date:   Mon, 26 Nov 2018 13:13:08 +0300
From:   Dan Carpenter <dan.carpenter@...cle.com>
To:     Nishad Kamdar <nishadkamdar@...il.com>
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        devel@...verdev.osuosl.org, linux-fbdev@...r.kernel.org,
        linux-kernel@...r.kernel.org, dri-devel@...ts.freedesktop.org
Subject: Re: [PATCH 04/26] Staging: fbtft: flexfb: Switch to the gpio
 descriptor interface

On Sun, Nov 25, 2018 at 04:56:29PM +0530, Nishad Kamdar wrote:
> This switches the flexfb.c to use GPIO descriptors
> rather than numerical gpios.
> 
> Signed-off-by: Nishad Kamdar <nishadkamdar@...il.com>
> ---
>  drivers/staging/fbtft/flexfb.c | 12 ++++++------
>  1 file changed, 6 insertions(+), 6 deletions(-)
> 
> diff --git a/drivers/staging/fbtft/flexfb.c b/drivers/staging/fbtft/flexfb.c
> index 2af474469e7d..c5fa59105a43 100644
> --- a/drivers/staging/fbtft/flexfb.c
> +++ b/drivers/staging/fbtft/flexfb.c
> @@ -9,7 +9,7 @@
>  #include <linux/kernel.h>
>  #include <linux/init.h>
>  #include <linux/vmalloc.h>
> -#include <linux/gpio.h>
> +#include <linux/gpio/consumer.h>
>  #include <linux/spi/spi.h>
>  #include <linux/delay.h>
>  
> @@ -521,7 +521,7 @@ static int flexfb_verify_gpios_dc(struct fbtft_par *par)
>  {
>  	fbtft_par_dbg(DEBUG_VERIFY_GPIOS, par, "%s()\n", __func__);
>  
> -	if (par->gpio.dc < 0) {
> +	if (!par->gpio.dc) {
>  		dev_err(par->info->device,
>  			"Missing info about 'dc' gpio. Aborting.\n");
>  		return -EINVAL;

We changed par->gpio.c from an int to a pointer in patch 1 so we have
to update all the checks as well in the same patch.  Otherwise it breaks
`git bisect`.

(I don't know this code well.  But it just feels like it has to be
breaking git bisect just from from glancing at the patches.  Perhaps I
have misunderstood).

regards,
dan carpenter