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authorTakashi Sakamoto <o-takashi@sakamocchi.jp>2025-09-17 09:03:46 +0900
committerTakashi Sakamoto <o-takashi@sakamocchi.jp>2025-09-17 09:07:03 +0900
commitabe7159125702c734e851bc0c52b51cd446298a5 (patch)
tree9c5be8cac3ff384041e9236b3719512d5ff3910d /rust/helpers
parentb460b317b21d5106f3ebd34bd51b851ad355a70a (diff)
firewire: core: disable bus management work temporarily during updating topology
When processing selfID sequence, bus topology tree is (re)built, and some members of fw_card are determined. Once determined, the members are valid during the bus generation. The above operations are in the critical section of fw_card spin lock. Before building the bus topology, a work item is scheduled for bus manager work. The bm_work() function is invoked by the work item. The function tries to acquire the spin lock, then can be stalled until the bus topology building finishes. The bus manager should work once the members of fw_card are determined. This commit suppresses the above situation by disabling the work item during processing selfID sequence. Link: https://lore.kernel.org/r/20250917000347.52369-3-o-takashi@sakamocchi.jp Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
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