lkml.org 
[lkml]   [2022]   [Jun]   [23]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH v1 1/2] driver core: fw_devlink: Allow firmware to mark devices as best effort
On Wed, Jun 22, 2022 at 02:59:10PM -0700, Saravana Kannan wrote:
> When firmware sets the FWNODE_FLAG_BEST_EFFORT flag for a fwnode,
> fw_devlink will do a best effort ordering for that device where it'll
> only enforce the probe/suspend/resume ordering of that device with
> suppliers that have drivers. The driver of that device can then decide
> if it wants to defer probe or probe without the suppliers.
>
> This will be useful for avoid probe delays of the console device that
> were caused by commit 71066545b48e ("driver core: Set
> fw_devlink.strict=1 by default").
>
> Fixes: 71066545b48e ("driver core: Set fw_devlink.strict=1 by default")
> Reported-by: Sascha Hauer <sha@pengutronix.de>
> Reported-by: Peng Fan <peng.fan@nxp.com>
> Signed-off-by: Saravana Kannan <saravanak@google.com>
> ---
> drivers/base/core.c | 3 ++-
> include/linux/fwnode.h | 4 ++++
> 2 files changed, 6 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/base/core.c b/drivers/base/core.c
> index 839f64485a55..61edd18b7bf3 100644
> --- a/drivers/base/core.c
> +++ b/drivers/base/core.c
> @@ -968,7 +968,8 @@ static void device_links_missing_supplier(struct device *dev)
>
> static bool dev_is_best_effort(struct device *dev)
> {
> - return fw_devlink_best_effort && dev->can_match;
> + return (fw_devlink_best_effort && dev->can_match) ||
> + dev->fwnode->flags & FWNODE_FLAG_BEST_EFFORT;

Check for dev->fwnode first. I am running in a NULL pointer exception
here for a device that doesn't have a fwnode.

Sascha


--
Pengutronix e.K. | |
Steuerwalder Str. 21 | http://www.pengutronix.de/ |
31137 Hildesheim, Germany | Phone: +49-5121-206917-0 |
Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917-5555 |

\
 
 \ /
  Last update: 2022-06-23 08:53    [W:1.065 / U:0.024 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site