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authorMatt Johnston <matt@codeconstruct.com.au>2023-03-30 09:15:32 +0300
committerAlexandre Belloni <alexandre.belloni@bootlin.com>2023-04-28 00:49:43 +0300
commit67df5ce9dd8870d3e53de5ebd6aecf609b713044 (patch)
tree280186fbc7f4fbe3c2f6da4d9b1787cd00f5b189 /drivers/i3c
parent2810f1de814adb7728b1068586bebcf733cf1992 (diff)
downloadlinux-67df5ce9dd8870d3e53de5ebd6aecf609b713044.tar.xz
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 <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>
Diffstat (limited to 'drivers/i3c')
-rw-r--r--drivers/i3c/master/dw-i3c-master.c7
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/i3c/master/dw-i3c-master.c b/drivers/i3c/master/dw-i3c-master.c
index 61ad03c4c2c9..e95d73e71574 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);