From: Jeremy Kerr <jk@codeconstruct.com.au>
To: linux-i3c@lists.infradead.org
Cc: Matt Johnston <matt@codeconstruct.com.au>,
Vitor Soares <ivitro@gmail.com>,
Alexandre Belloni <alexandre.belloni@bootlin.com>,
Jack Chen <zenghuchen@google.com>
Subject: [PATCH 1/2] i3c: dw: Return the length from a read priv_xfer
Date: Thu, 30 Mar 2023 14:15:32 +0800 [thread overview]
Message-ID: <f4fff7ab18dee1f662dc7a5a4111fcd921e6792b.1680156630.git.jk@codeconstruct.com.au> (raw)
In-Reply-To: <cover.1680156630.git.jk@codeconstruct.com.au>
From: Matt Johnston <matt@codeconstruct.com.au>
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>
---
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 48954d3e6571..97a5442b1ad8 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);
--
2.39.2
--
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next prev parent reply other threads:[~2023-03-30 7:08 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-03-30 6:15 [PATCH 0/2] i3c: dw: minor changes Jeremy Kerr
2023-03-30 6:15 ` Jeremy Kerr [this message]
2023-03-30 6:15 ` [PATCH 2/2] i3c: dw: use bus mode rather than device reg for conditional tCAS setting Jeremy Kerr
2023-04-27 21:50 ` [PATCH 0/2] i3c: dw: minor changes Alexandre Belloni
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