i3c: master: Validate GET CCC payload length and retry Direct GET once

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Add retries to struct i3c_ccc_cmd. Validate GET payload length in
i3c_master_send_ccc_cmd_locked() after a successful transfer.

Retry failed Direct GET CCCs up to cmd->retries times when the driver
reports failure or an I3C error; validation failures are not retried.
SET CCCs are not retried by default.

Signed-off-by: Adrian Ng Ho Yin <adrian.ho.yin.ng@altera.com>
Signed-off-by: Tze Yee Ng <tze.yee.ng@altera.com>
Reviewed-by: Alexandre Mergnat <amergnat@baylibre.com>
Reviewed-by: Frank Li <Frank.Li@nxp.com>
Tested-by: Tommaso Merciai <tommaso.merciai.xr@bp.renesas.com>
Tested-by: Claudiu Beznea <claudiu.beznea.uj@bp.renesas.com> # on RZ/G3S
Link: https://patch.msgid.link/b467f01edfaaa0710f30e719ce7f2753b06c1a3f.1783493868.git.tze.yee.ng@altera.com
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>

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Adrian Ng Ho Yin 2026-07-08 00:17:40 -07:00 • committed by Alexandre Belloni

parent 790354f7c4

commit 09361ed979

2 changed files with 60 additions and 4 deletions

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59

drivers/i3c/master.c

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5

include/linux/i3c/ccc.h

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