diff mbox series

[net-next,1/3] nfc: s3fwrn5: use signed integer for parsing GPIO numbers

Message ID 1606404819-30647-1-git-send-email-bongsu.jeon@samsung.com
State New
Headers show
Series [net-next,1/3] nfc: s3fwrn5: use signed integer for parsing GPIO numbers | expand

Commit Message

Bongsu Jeon Nov. 26, 2020, 3:33 p.m. UTC 
From: Krzysztof Kozlowski <krzk@kernel.org>

GPIOs - as returned by of_get_named_gpio() and used by the gpiolib - are
signed integers, where negative number indicates error.  The return
value of of_get_named_gpio() should not be assigned to an unsigned int
because in case of !CONFIG_GPIOLIB such number would be a valid GPIO.

Fixes: c04c674fadeb ("nfc: s3fwrn5: Add driver for Samsung S3FWRN5 NFC Chip")
Cc: <stable@vger.kernel.org>
Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
---
 drivers/nfc/s3fwrn5/i2c.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

Comments

Krzysztof Kozlowski Nov. 26, 2020, 5:03 p.m. UTC | #1 
On Fri, Nov 27, 2020 at 12:33:38AM +0900, bongsu.jeon2@gmail.com wrote:
> From: Bongsu Jeon <bongsu.jeon@samsung.com>
> 
> The delay of 20ms is enough to enable and
> wake up the Samsung's nfc chip.
> 
> Signed-off-by: Bongsu Jeon <bongsu.jeon@samsung.com>
> ---
>  drivers/nfc/s3fwrn5/i2c.c | 6 +++---
>  1 file changed, 3 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/nfc/s3fwrn5/i2c.c b/drivers/nfc/s3fwrn5/i2c.c
> index ae26594..9a64eea 100644
> --- a/drivers/nfc/s3fwrn5/i2c.c
> +++ b/drivers/nfc/s3fwrn5/i2c.c
> @@ -19,7 +19,7 @@
>  

Acked-by: Krzysztof Kozlowski <krzk@kernel.org>

Best regards,
Krzysztof
Bongsu Jeon Nov. 26, 2020, 10:53 p.m. UTC | #2 
On Fri, Nov 27, 2020 at 2:06 AM Krzysztof Kozlowski <krzk@kernel.org> wrote:
>
> On Fri, Nov 27, 2020 at 12:33:37AM +0900, bongsu.jeon2@gmail.com wrote:
> > From: Krzysztof Kozlowski <krzk@kernel.org>
> >
> > GPIOs - as returned by of_get_named_gpio() and used by the gpiolib - are
> > signed integers, where negative number indicates error.  The return
> > value of of_get_named_gpio() should not be assigned to an unsigned int
> > because in case of !CONFIG_GPIOLIB such number would be a valid GPIO.
> >
> > Fixes: c04c674fadeb ("nfc: s3fwrn5: Add driver for Samsung S3FWRN5 NFC Chip")
> > Cc: <stable@vger.kernel.org>
> > Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
>
> Why do you send my patch?
>

I think that your patch should be applied before refactoring for this driver.
So, I applied your patch to net-next branch and included your patch at
my patch list.
Is this the wrong process?

> Best regards,
> Krzysztof
diff mbox series

Patch

diff --git a/drivers/nfc/s3fwrn5/i2c.c b/drivers/nfc/s3fwrn5/i2c.c
index 0ffa389..ae26594 100644
--- a/drivers/nfc/s3fwrn5/i2c.c
+++ b/drivers/nfc/s3fwrn5/i2c.c
@@ -25,8 +25,8 @@  struct s3fwrn5_i2c_phy {
 	struct i2c_client *i2c_dev;
 	struct nci_dev *ndev;
 
-	unsigned int gpio_en;
-	unsigned int gpio_fw_wake;
+	int gpio_en;
+	int gpio_fw_wake;
 
 	struct mutex mutex;