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thunderbolt: Introduce tb_switch_depth()

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This is useful helper to find out the depth of a connected router.
Convert the existing users to call this helper instead of open-coding.

No functional changes.

Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
This commit is contained in:
Mika Westerberg 2023-09-04 09:09:34 +03:00
parent 956c3abe72
commit c4ff144369
2 changed files with 11 additions and 2 deletions
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4
drivers/thunderbolt/tb.c
View File

@ -255,13 +255,13 @@ static int tb_enable_clx(struct tb_switch *sw)
* this in the future to cover the whole topology if it turns
* out to be beneficial.
*/
while (sw && sw->config.depth > 1)
while (sw && tb_switch_depth(sw) > 1)
sw = tb_switch_parent(sw);
if (!sw)
return 0;
if (sw->config.depth != 1)
if (tb_switch_depth(sw) != 1)
return 0;
/*

9
drivers/thunderbolt/tb.h
View File

@ -866,6 +866,15 @@ static inline struct tb_port *tb_switch_downstream_port(struct tb_switch *sw)
return tb_port_at(tb_route(sw), tb_switch_parent(sw));
}
/**
* tb_switch_depth() - Returns depth of the connected router
* @sw: Router
*/
static inline int tb_switch_depth(const struct tb_switch *sw)
{
return sw->config.depth;
}
static inline bool tb_switch_is_light_ridge(const struct tb_switch *sw)
{
return sw->config.vendor_id == PCI_VENDOR_ID_INTEL &&