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Billy Tsai 81e4a54676 i3c: mipi-i3c-hci: fix IBI payload length calculation for final status ... [ Upstream commit d35a6db887 ] In DMA mode, the IBI status descriptor encodes the payload using CHUNKS (number of chunks) and DATA_LENGTH (valid bytes in the last chunk). All preceding chunks are implicitly full-sized. The current code accumulates full chunk sizes for non-final status descriptors, but for the final status descriptor it only adds DATA_LENGTH. This ignores the contribution of the preceding full chunks described by the same final status entry. As a result, the computed IBI payload length is truncated whenever the final status spans multiple chunks. For example, with a chunk size of 4 bytes, CHUNKS=2 and DATA_LENGTH=1 should result in a total payload size of 5 bytes, but the current code reports only 1 byte. Fix the calculation by adding the size of (CHUNKS - 1) full chunks plus DATA_LENGTH for the last chunk. Fixes: 9ad9a52cce ("i3c/master: introduce the mipi-i3c-hci driver") Signed-off-by: Billy Tsai <billy_tsai@aspeedtech.com> Reviewed-by: Frank Li <Frank.Li@nxp.com> Link: https://patch.msgid.link/20260407-i3c-hci-dma-v2-1-a583187b9d22@aspeedtech.com Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com> Signed-off-by: Sasha Levin <sashal@kernel.org>		History 2026-06-01 17:35:35 +02:00
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master	i3c: mipi-i3c-hci: fix IBI payload length calculation for final status	2026-06-01 17:35:35 +02:00
device.c	i3c: Handle drivers without probe or remove callback	2021-02-02 00:16:57 +01:00
internals.h	i3c: add missing include to internal header	2025-08-28 16:24:24 +02:00
Kconfig	i3c: Add core I3C infrastructure	2018-11-12 10:33:49 +01:00
Makefile	i3c: Add core I3C infrastructure	2018-11-12 10:33:49 +01:00
master.c	i3c: fix uninitialized variable use in i2c setup	2026-06-01 17:35:03 +02:00