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authorFrank Li <[email protected]>2024-10-01 12:22:32 -0400
committerAlexandre Belloni <[email protected]>2024-10-31 23:59:18 +0100
commit36faa04ce3d9c962b4b29d285ad07ca29e2988e4 (patch)
tree6412ead8f76f083c686cf8ce7cf1487243c8c173 /tools/perf/scripts/python/check-perf-trace.py
parent3b2ac810d86eb96e882db80a3320a3848b133208 (diff)
i3c: master: Remove i3c_dev_disable_ibi_locked(olddev) on device hotjoin
When a new device hotjoins, a new dynamic address is assigned. i3c_master_add_i3c_dev_locked() identifies that the device was previously attached to the bus and locates the olddev. i3c_master_add_i3c_dev_locked() { ... olddev = i3c_master_search_i3c_dev_duplicate(newdev); ... if (olddev) { ... i3c_dev_disable_ibi_locked(olddev); ^^^^^^ The olddev should not receive any commands on the i3c bus as it does not exist and has been assigned a new address. This will result in NACK or timeout. So remove it. } i3c_dev_free_ibi_locked(olddev); ^^^^^^^^ This function internally calls i3c_dev_disable_ibi_locked() function causing to send DISEC command with old Address. The olddev should not receive any commands on the i3c bus as it does not exist and has been assigned a new address. This will result in NACK or timeout. So, update the olddev->ibi->enabled flag to false to avoid DISEC with OldAddr. } Include part of Ravindra Yashvant Shinde's work: https://lore.kernel.org/linux-i3c/[email protected]/T/#u Fixes: 317bacf960a4 ("i3c: master: add enable(disable) hot join in sys entry") Co-developed-by: Ravindra Yashvant Shinde <[email protected]> Signed-off-by: Ravindra Yashvant Shinde <[email protected]> Reviewed-by: Miquel Raynal <[email protected]> Signed-off-by: Frank Li <[email protected]> Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Alexandre Belloni <[email protected]>
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