From 67df5ce9dd8870d3e53de5ebd6aecf609b713044 Mon Sep 17 00:00:00 2001 From: Matt Johnston Date: Thu, 30 Mar 2023 14:15:32 +0800 Subject: [PATCH] i3c: dw: Return the length from a read priv_xfer We currently assume that the rx_len of a read command will be as submitted, but we may have a shorter read than expected. This change populates the output i3c xfer length from the actually-read length. Signed-off-by: Matt Johnston Signed-off-by: Jeremy Kerr Link: https://lore.kernel.org/r/f4fff7ab18dee1f662dc7a5a4111fcd921e6792b.1680156630.git.jk@codeconstruct.com.au Signed-off-by: Alexandre Belloni --- drivers/i3c/master/dw-i3c-master.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/drivers/i3c/master/dw-i3c-master.c b/drivers/i3c/master/dw-i3c-master.c index 61ad03c..e95d73e 100644 --- a/drivers/i3c/master/dw-i3c-master.c +++ b/drivers/i3c/master/dw-i3c-master.c @@ -887,6 +887,13 @@ static int dw_i3c_master_priv_xfers(struct i3c_dev_desc *dev, if (!wait_for_completion_timeout(&xfer->comp, XFER_TIMEOUT)) dw_i3c_master_dequeue_xfer(master, xfer); + for (i = 0; i < i3c_nxfers; i++) { + struct dw_i3c_cmd *cmd = &xfer->cmds[i]; + + if (i3c_xfers[i].rnw) + i3c_xfers[i].len = cmd->rx_len; + } + ret = xfer->ret; dw_i3c_master_free_xfer(xfer); -- 2.7.4