diff options
| author | Adrian Ng Ho Yin <adrian.ho.yin.ng@altera.com> | 2026-07-08 00:17:40 -0700 |
|---|---|---|
| committer | Alexandre Belloni <alexandre.belloni@bootlin.com> | 2026-07-31 09:28:12 +0200 |
| commit | 09361ed979e68622977751f6274f280d7aec5cb6 (patch) | |
| tree | 0d22ae96d0b069341e3fd561803397b6a70bbf68 /include/linux | |
| parent | 790354f7c4f70cd4be2bd53a62d87ebd53343846 (diff) | |
i3c: master: Validate GET CCC payload length and retry Direct GET once
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>
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/i3c/ccc.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/include/linux/i3c/ccc.h b/include/linux/i3c/ccc.h index d8052949e57e..2506d83b8255 100644 --- a/include/linux/i3c/ccc.h +++ b/include/linux/i3c/ccc.h @@ -12,6 +12,8 @@ #include <linux/i3c/device.h> /* I3C CCC (Common Command Codes) related definitions */ +#define I3C_CCC_RETRIES 1 + #define I3C_CCC_DIRECT BIT(7) #define I3C_CCC_ID(id, broadcast) \ @@ -374,12 +376,15 @@ struct i3c_ccc_cmd_dest { * @ndests: number of destinations. Should always be one for broadcast commands * @dests: array of destinations and associated payload for this CCC. Most of * the time, only one destination is provided + * @retries: number of times to retry a failed Direct GET CCC (see + * &I3C_CCC_RETRIES) * @err: I3C error code */ struct i3c_ccc_cmd { u8 rnw; u8 id; unsigned int ndests; + unsigned int retries; struct i3c_ccc_cmd_dest *dests; enum i3c_error_code err; }; |