linux-kernel - Re: [PATCH 1/3] usb: typec: ucsi: Stop abuse of bit definitions from ucsi.h

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date: Wed, 3 Apr 2024 13:39:44 +0300
From: Heikki Krogerus <heikki.krogerus@...ux.intel.com>
To: "Christian A. Ehrhardt" <lk@...e.de>
Cc: linux-kernel@...r.kernel.org,
	Dmitry Baryshkov <dmitry.baryshkov@...aro.org>,
	Diogo Ivo <diogo.ivo@...nico.ulisboa.pt>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Prashant Malani <pmalani@...omium.org>,
	Jameson Thies <jthies@...gle.com>,
	Abhishek Pandit-Subedi <abhishekpandit@...omium.org>,
	Neil Armstrong <neil.armstrong@...aro.org>,
	Uwe Kleine-König <u.kleine-koenig@...gutronix.de>,
	Samuel Čavoj <samuel@...oj.net>,
	linux-usb@...r.kernel.org
Subject: Re: [PATCH 1/3] usb: typec: ucsi: Stop abuse of bit definitions from
 ucsi.h

On Wed, Mar 27, 2024 at 11:45:52PM +0100, Christian A. Ehrhardt wrote:
> In ucsi.h there are flag definitions for the ->flags field
> in struct ucsi. Some implementations abuse these bits for
> their private ->flags fields e.g. in struct ucsi_acpi.
> 
> Move the definitions into the backend implementations that
> still need them. While there fix one instance where the flag
> name was not converted in a previous change.
> 
> No semantic change intended.
> 
> Signed-off-by: Christian A. Ehrhardt <lk@...e.de>

Reviewed-by: Heikki Krogerus <heikki.krogerus@...ux.intel.com>

> ---
>  drivers/usb/typec/ucsi/ucsi.h         | 2 --
>  drivers/usb/typec/ucsi/ucsi_acpi.c    | 3 ++-
>  drivers/usb/typec/ucsi/ucsi_stm32g0.c | 1 +
>  3 files changed, 3 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/usb/typec/ucsi/ucsi.h b/drivers/usb/typec/ucsi/ucsi.h
> index 0e7c92eb1b22..591f734d457b 100644
> --- a/drivers/usb/typec/ucsi/ucsi.h
> +++ b/drivers/usb/typec/ucsi/ucsi.h
> @@ -403,8 +403,6 @@ struct ucsi {
>  	/* PPM communication flags */
>  	unsigned long flags;
>  #define EVENT_PENDING	0
> -#define COMMAND_PENDING	1
> -#define ACK_PENDING	2
>  
>  	unsigned long quirks;
>  #define UCSI_NO_PARTNER_PDOS	BIT(0)	/* Don't read partner's PDOs */
> diff --git a/drivers/usb/typec/ucsi/ucsi_acpi.c b/drivers/usb/typec/ucsi/ucsi_acpi.c
> index 7b3ac133ef86..cc03a49c589c 100644
> --- a/drivers/usb/typec/ucsi/ucsi_acpi.c
> +++ b/drivers/usb/typec/ucsi/ucsi_acpi.c
> @@ -203,7 +203,8 @@ static void ucsi_acpi_notify(acpi_handle handle, u32 event, void *data)
>  	    !test_bit(UCSI_ACPI_SUPPRESS_EVENT, &ua->flags))
>  		ucsi_connector_change(ua->ucsi, UCSI_CCI_CONNECTOR(cci));
>  
> -	if (cci & UCSI_CCI_ACK_COMPLETE && test_bit(ACK_PENDING, &ua->flags))
> +	if (cci & UCSI_CCI_ACK_COMPLETE &&
> +	    test_bit(UCSI_ACPI_ACK_PENDING, &ua->flags))
>  		complete(&ua->complete);
>  	if (cci & UCSI_CCI_COMMAND_COMPLETE &&
>  	    test_bit(UCSI_ACPI_COMMAND_PENDING, &ua->flags))
> diff --git a/drivers/usb/typec/ucsi/ucsi_stm32g0.c b/drivers/usb/typec/ucsi/ucsi_stm32g0.c
> index 93d7806681cf..ac48b7763114 100644
> --- a/drivers/usb/typec/ucsi/ucsi_stm32g0.c
> +++ b/drivers/usb/typec/ucsi/ucsi_stm32g0.c
> @@ -64,6 +64,7 @@ struct ucsi_stm32g0 {
>  	struct completion complete;
>  	struct device *dev;
>  	unsigned long flags;
> +#define COMMAND_PENDING	1
>  	const char *fw_name;
>  	struct ucsi *ucsi;
>  	bool suspended;
> -- 
> 2.40.1

-- 
heikki