diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/base/arch_topology.c | 13 | ||||
| -rw-r--r-- | drivers/base/core.c | 26 |
2 files changed, 26 insertions, 13 deletions
diff --git a/drivers/base/arch_topology.c b/drivers/base/arch_topology.c index 018ac202de34..024b78a0cfc1 100644 --- a/drivers/base/arch_topology.c +++ b/drivers/base/arch_topology.c @@ -431,9 +431,6 @@ init_cpu_capacity_callback(struct notifier_block *nb, struct cpufreq_policy *policy = data; int cpu; - if (!raw_capacity) - return 0; - if (val != CPUFREQ_CREATE_POLICY) return 0; @@ -450,9 +447,11 @@ init_cpu_capacity_callback(struct notifier_block *nb, } if (cpumask_empty(cpus_to_visit)) { - topology_normalize_cpu_scale(); - schedule_work(&update_topology_flags_work); - free_raw_capacity(); + if (raw_capacity) { + topology_normalize_cpu_scale(); + schedule_work(&update_topology_flags_work); + free_raw_capacity(); + } pr_debug("cpu_capacity: parsing done\n"); schedule_work(&parsing_done_work); } @@ -472,7 +471,7 @@ static int __init register_cpufreq_notifier(void) * On ACPI-based systems skip registering cpufreq notifier as cpufreq * information is not needed for cpu capacity initialization. */ - if (!acpi_disabled || !raw_capacity) + if (!acpi_disabled) return -EINVAL; if (!alloc_cpumask_var(&cpus_to_visit, GFP_KERNEL)) diff --git a/drivers/base/core.c b/drivers/base/core.c index 14d46af40f9a..9828da9b933c 100644 --- a/drivers/base/core.c +++ b/drivers/base/core.c @@ -125,7 +125,7 @@ static void __fwnode_link_del(struct fwnode_link *link) */ static void __fwnode_link_cycle(struct fwnode_link *link) { - pr_debug("%pfwf: Relaxing link with %pfwf\n", + pr_debug("%pfwf: cycle: depends on %pfwf\n", link->consumer, link->supplier); link->flags |= FWLINK_FLAG_CYCLE; } @@ -284,10 +284,12 @@ static bool device_is_ancestor(struct device *dev, struct device *target) return false; } +#define DL_MARKER_FLAGS (DL_FLAG_INFERRED | \ + DL_FLAG_CYCLE | \ + DL_FLAG_MANAGED) static inline bool device_link_flag_is_sync_state_only(u32 flags) { - return (flags & ~(DL_FLAG_INFERRED | DL_FLAG_CYCLE)) == - (DL_FLAG_SYNC_STATE_ONLY | DL_FLAG_MANAGED); + return (flags & ~DL_MARKER_FLAGS) == DL_FLAG_SYNC_STATE_ONLY; } /** @@ -1943,6 +1945,7 @@ static bool __fw_devlink_relax_cycles(struct device *con, /* Termination condition. */ if (sup_dev == con) { + pr_debug("----- cycle: start -----\n"); ret = true; goto out; } @@ -1974,8 +1977,11 @@ static bool __fw_devlink_relax_cycles(struct device *con, else par_dev = fwnode_get_next_parent_dev(sup_handle); - if (par_dev && __fw_devlink_relax_cycles(con, par_dev->fwnode)) + if (par_dev && __fw_devlink_relax_cycles(con, par_dev->fwnode)) { + pr_debug("%pfwf: cycle: child of %pfwf\n", sup_handle, + par_dev->fwnode); ret = true; + } if (!sup_dev) goto out; @@ -1991,6 +1997,8 @@ static bool __fw_devlink_relax_cycles(struct device *con, if (__fw_devlink_relax_cycles(con, dev_link->supplier->fwnode)) { + pr_debug("%pfwf: cycle: depends on %pfwf\n", sup_handle, + dev_link->supplier->fwnode); fw_devlink_relax_link(dev_link); dev_link->flags |= DL_FLAG_CYCLE; ret = true; @@ -2058,13 +2066,19 @@ static int fw_devlink_create_devlink(struct device *con, /* * SYNC_STATE_ONLY device links don't block probing and supports cycles. - * So cycle detection isn't necessary and shouldn't be done. + * So, one might expect that cycle detection isn't necessary for them. + * However, if the device link was marked as SYNC_STATE_ONLY because + * it's part of a cycle, then we still need to do cycle detection. This + * is because the consumer and supplier might be part of multiple cycles + * and we need to detect all those cycles. */ - if (!(flags & DL_FLAG_SYNC_STATE_ONLY)) { + if (!device_link_flag_is_sync_state_only(flags) || + flags & DL_FLAG_CYCLE) { device_links_write_lock(); if (__fw_devlink_relax_cycles(con, sup_handle)) { __fwnode_link_cycle(link); flags = fw_devlink_get_flags(link->flags); + pr_debug("----- cycle: end -----\n"); dev_info(con, "Fixed dependency cycle(s) with %pfwf\n", sup_handle); } |