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i3c: dw: Return the length from a read priv_xfer

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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 <matt@codeconstruct.com.au>
Signed-off-by: Jeremy Kerr <jk@codeconstruct.com.au>
Link: https://lore.kernel.org/r/f4fff7ab18dee1f662dc7a5a4111fcd921e6792b.1680156630.git.jk@codeconstruct.com.au
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
This commit is contained in:
Matt Johnston 2023-03-30 14:15:32 +08:00 committed by Alexandre Belloni
parent 2810f1de81
commit 67df5ce9dd
1 changed files with 7 additions and 0 deletions
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7
drivers/i3c/master/dw-i3c-master.c
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@ -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);