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backlight: filter out unnecessary backlight devices by device enumerator

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This commit is contained in:
Yu Watanabe 2022-08-08 23:25:34 +09:00
parent b2f77b5e21
commit f8ff4b6076
1 changed files with 12 additions and 7 deletions
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19
src/backlight/backlight.c
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@ -188,17 +188,22 @@ static int validate_device(sd_device *device) {
if (r < 0)
return log_debug_errno(r, "Failed to add subsystem match: %m");
r = sd_device_enumerator_add_nomatch_sysname(enumerate, sysname);
if (r < 0)
return log_debug_errno(r, "Failed to add sysname unmatch: %m");
r = sd_device_enumerator_add_match_sysattr(enumerate, "type", "platform", /* match = */ true);
if (r < 0)
return log_debug_errno(r, "Failed to add sysattr match: %m");
r = sd_device_enumerator_add_match_sysattr(enumerate, "type", "firmware", /* match = */ true);
if (r < 0)
return log_debug_errno(r, "Failed to add sysattr match: %m");
FOREACH_DEVICE(enumerate, other) {
const char *other_subsystem;
sd_device *other_parent;
if (same_device(device, other) > 0)
continue;
if (sd_device_get_sysattr_value(other, "type", &v) < 0 ||
!STR_IN_SET(v, "platform", "firmware"))
continue;
/* OK, so there's another backlight device, and it's a platform or firmware device.
* Let's see if we can verify it belongs to the same device as ours. */
r = find_pci_or_platform_parent(other, &other_parent);