diff options
| author | Frank Li <Frank.Li@nxp.com> | 2023-12-01 17:25:31 -0500 |
|---|---|---|
| committer | Alexandre Belloni <alexandre.belloni@bootlin.com> | 2024-01-08 00:49:21 +0100 |
| commit | 6d1a19d34e2cc07ca9cdad8892da94e716e9d15f (patch) | |
| tree | e23385144df36013657a78c181f9cbf2b0a732bc /drivers/i3c | |
| parent | 6fb61734a74eaa307a5b6a0bee770e736d8acf89 (diff) | |
| download | linux-6d1a19d34e2cc07ca9cdad8892da94e716e9d15f.tar.gz | |
i3c: master: svc: return actual transfer data len
I3C allow devices early terminate data transfer. So set "actual_len" to
indicate how much data get by i3c_priv_xfer.
Reviewed-by: Miquel Raynal <miquel.raynal@bootlin.com>
Signed-off-by: Frank Li <Frank.Li@nxp.com>
Link: https://lore.kernel.org/r/20231201222532.2431484-6-Frank.Li@nxp.com
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Diffstat (limited to 'drivers/i3c')
| -rw-r--r-- | drivers/i3c/master/svc-i3c-master.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/drivers/i3c/master/svc-i3c-master.c b/drivers/i3c/master/svc-i3c-master.c index ad2f486ccf888a..5ee4db68988e23 100644 --- a/drivers/i3c/master/svc-i3c-master.c +++ b/drivers/i3c/master/svc-i3c-master.c @@ -138,6 +138,7 @@ struct svc_i3c_cmd { const void *out; unsigned int len; unsigned int actual_len; + struct i3c_priv_xfer *xfer; bool continued; }; @@ -1062,6 +1063,7 @@ static int svc_i3c_master_xfer(struct svc_i3c_master *master, if (readl(master->regs + SVC_I3C_MERRWARN) & SVC_I3C_MERRWARN_NACK) { ret = -ENXIO; + *actual_len = 0; goto emit_stop; } @@ -1079,6 +1081,7 @@ static int svc_i3c_master_xfer(struct svc_i3c_master *master, */ if (SVC_I3C_MSTATUS_IBIWON(reg)) { ret = -ENXIO; + *actual_len = 0; goto emit_stop; } @@ -1174,6 +1177,10 @@ static void svc_i3c_master_start_xfer_locked(struct svc_i3c_master *master) cmd->addr, cmd->in, cmd->out, cmd->len, &cmd->actual_len, cmd->continued); + /* cmd->xfer is NULL if I2C or CCC transfer */ + if (cmd->xfer) + cmd->xfer->actual_len = cmd->actual_len; + if (ret) break; } @@ -1361,6 +1368,7 @@ static int svc_i3c_master_priv_xfers(struct i3c_dev_desc *dev, for (i = 0; i < nxfers; i++) { struct svc_i3c_cmd *cmd = &xfer->cmds[i]; + cmd->xfer = &xfers[i]; cmd->addr = master->addrs[data->index]; cmd->rnw = xfers[i].rnw; cmd->in = xfers[i].rnw ? xfers[i].data.in : NULL; |