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>
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@ -138,6 +138,7 @@ struct svc_i3c_cmd {
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const void *out;
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unsigned int len;
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unsigned int actual_len;
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struct i3c_priv_xfer *xfer;
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bool continued;
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};
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@ -1062,6 +1063,7 @@ static int svc_i3c_master_xfer(struct svc_i3c_master *master,
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if (readl(master->regs + SVC_I3C_MERRWARN) & SVC_I3C_MERRWARN_NACK) {
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ret = -ENXIO;
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*actual_len = 0;
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goto emit_stop;
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}
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@ -1079,6 +1081,7 @@ static int svc_i3c_master_xfer(struct svc_i3c_master *master,
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*/
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if (SVC_I3C_MSTATUS_IBIWON(reg)) {
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ret = -ENXIO;
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*actual_len = 0;
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goto emit_stop;
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}
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@ -1174,6 +1177,10 @@ static void svc_i3c_master_start_xfer_locked(struct svc_i3c_master *master)
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cmd->addr, cmd->in, cmd->out,
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cmd->len, &cmd->actual_len,
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cmd->continued);
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/* cmd->xfer is NULL if I2C or CCC transfer */
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if (cmd->xfer)
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cmd->xfer->actual_len = cmd->actual_len;
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if (ret)
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break;
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}
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@ -1361,6 +1368,7 @@ static int svc_i3c_master_priv_xfers(struct i3c_dev_desc *dev,
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for (i = 0; i < nxfers; i++) {
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struct svc_i3c_cmd *cmd = &xfer->cmds[i];
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cmd->xfer = &xfers[i];
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cmd->addr = master->addrs[data->index];
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cmd->rnw = xfers[i].rnw;
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cmd->in = xfers[i].rnw ? xfers[i].data.in : NULL;
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