Re: [PATCH v2] usb: typec: Fix fast_role_swap_current show function

[Benson Leung]

Hi Pavan,

On Wed, Jun 7, 2023 at 12:33 PM Pavan Holla <pholla@xxxxxxxxxxxx> wrote:
>
> The current implementation mistakenly performs a & operation on
> the output of sysfs_emit. This patch performs the & operation before
> calling sysfs_emit.
>
> Fixes: 662a60102c12 ("usb: typec: Separate USB Power Delivery from USB Type-C")
> Reported-by: Benson Leung <bleung@xxxxxxxxxxxx>
> Signed-off-by: Pavan Holla <pholla@xxxxxxxxxxxx>

Reviewed-by: Benson Leung <bleung@xxxxxxxxxxxx>

> ---
>  drivers/usb/typec/pd.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/usb/typec/pd.c b/drivers/usb/typec/pd.c
> index 0bcde1ff4d39..8cc66e4467c4 100644
> --- a/drivers/usb/typec/pd.c
> +++ b/drivers/usb/typec/pd.c
> @@ -95,7 +95,7 @@ peak_current_show(struct device *dev, struct device_attribute *attr, char *buf)
>  static ssize_t
>  fast_role_swap_current_show(struct device *dev, struct device_attribute *attr, char *buf)
>  {
> -       return sysfs_emit(buf, "%u\n", to_pdo(dev)->pdo >> PDO_FIXED_FRS_CURR_SHIFT) & 3;
> +       return sysfs_emit(buf, "%u\n", (to_pdo(dev)->pdo >> PDO_FIXED_FRS_CURR_SHIFT) & 3);
>  }
>  static DEVICE_ATTR_RO(fast_role_swap_current);
>
> --
> 2.41.0.rc0.172.g3f132b7071-goog
>


-- 
Benson Leung
Staff Software Engineer
Chrome OS Kernel
Google Inc.
bleung@xxxxxxxxxx
Chromium OS Project
bleung@xxxxxxxxxxxx