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| author |   Saravana Kannan <saravanak@google.com> | 2023-02-06 17:41:58 -0800 |
|---|---|---|
| committer |   Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2023-02-08 13:37:54 +0100 |
| commit | 6a6dfdf8b3ff337be5a447e9f4e71969f18370ad (patch) | |
| tree | 3199b529d31da40184d873b74839652d984f333e /include/linux/fwnode.h | |
| parent | driver core: fw_devlink: Add DL_FLAG_CYCLE support to device links (diff) | |
| download | wireguard-linux-6a6dfdf8b3ff337be5a447e9f4e71969f18370ad.tar.xz wireguard-linux-6a6dfdf8b3ff337be5a447e9f4e71969f18370ad.zip | |
driver core: fw_devlink: Allow marking a fwnode link as being part of a cycle
To improve detection and handling of dependency cycles, we need to be
able to mark fwnode links as being part of cycles. fwnode links marked
as being part of a cycle should not block their consumers from probing.
Fixes: 2de9d8e0d2fe ("driver core: fw_devlink: Improve handling of cyclic dependencies")
Signed-off-by: Saravana Kannan <saravanak@google.com>
Tested-by: Colin Foster <colin.foster@in-advantage.com>
Tested-by: Sudeep Holla <sudeep.holla@arm.com>
Tested-by: Douglas Anderson <dianders@chromium.org>
Tested-by: Geert Uytterhoeven <geert+renesas@glider.be>
Tested-by: Luca Weiss <luca.weiss@fairphone.com> # qcom/sm7225-fairphone-fp4
Link: https://lore.kernel.org/r/20230207014207.1678715-7-saravanak@google.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'include/linux/fwnode.h')
| -rw-r--r-- | include/linux/fwnode.h | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/include/linux/fwnode.h b/include/linux/fwnode.h index 89b9bdfca925..fdf2ee0285b7 100644 --- a/include/linux/fwnode.h +++ b/include/linux/fwnode.h @@ -18,7 +18,7 @@ struct fwnode_operations; struct device; /* - * fwnode link flags + * fwnode flags * * LINKS_ADDED: The fwnode has already be parsed to add fwnode links. * NOT_DEVICE: The fwnode will never be populated as a struct device. @@ -36,6 +36,7 @@ struct device; #define FWNODE_FLAG_INITIALIZED BIT(2) #define FWNODE_FLAG_NEEDS_CHILD_BOUND_ON_ADD BIT(3) #define FWNODE_FLAG_BEST_EFFORT BIT(4) +#define FWNODE_FLAG_VISITED BIT(5) struct fwnode_handle { struct fwnode_handle *secondary; @@ -46,11 +47,19 @@ struct fwnode_handle { u8 flags; }; +/* + * fwnode link flags + * + * CYCLE: The fwnode link is part of a cycle. Don't defer probe. + */ +#define FWLINK_FLAG_CYCLE BIT(0) + struct fwnode_link { struct fwnode_handle *supplier; struct list_head s_hook; struct fwnode_handle *consumer; struct list_head c_hook; + u8 flags; }; /** |