All of lore.kernel.org
 help / color / mirror / Atom feed
From: Jisheng Zhang <jszhang@kernel.org>
To: Alexandre Belloni <alexandre.belloni@bootlin.com>,
	Frank Li <Frank.Li@nxp.com>
Cc: linux-i3c@lists.infradead.org, linux-kernel@vger.kernel.org
Subject: [PATCH] i3c: dw: reduce do_daa time if there's no client
Date: Mon,  3 Aug 2026 22:03:07 +0800	[thread overview]
Message-ID: <20260803140307.12665-1-jszhang@kernel.org> (raw)

If there's no client, wait for completion will timeout, then there's no
need to add i3c dev at all. This can save boot time by ~6s if there's
no client connected to the i3c interface.

Signed-off-by: Jisheng Zhang <jszhang@kernel.org>
---
 drivers/i3c/master/dw-i3c-master.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/i3c/master/dw-i3c-master.c b/drivers/i3c/master/dw-i3c-master.c
index 0625587f1527..18ebf304029a 100644
--- a/drivers/i3c/master/dw-i3c-master.c
+++ b/drivers/i3c/master/dw-i3c-master.c
@@ -885,8 +885,10 @@ static int dw_i3c_master_daa(struct i3c_master_controller *m)
 		      COMMAND_PORT_ROC;
 
 	dw_i3c_master_enqueue_xfer(master, xfer);
-	if (!wait_for_completion_timeout(&xfer->comp, XFER_TIMEOUT))
+	if (!wait_for_completion_timeout(&xfer->comp, XFER_TIMEOUT)) {
 		dw_i3c_master_dequeue_xfer(master, xfer);
+		goto rpm_out;
+	}
 
 	newdevs = GENMASK(master->maxdevs - cmd->rx_len - 1, 0);
 	newdevs &= ~olddevs;
-- 
2.53.0


-- 
linux-i3c mailing list
linux-i3c@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-i3c

WARNING: multiple messages have this Message-ID (diff)
From: Jisheng Zhang <jszhang@kernel.org>
To: Alexandre Belloni <alexandre.belloni@bootlin.com>,
	Frank Li <Frank.Li@nxp.com>
Cc: linux-i3c@lists.infradead.org, linux-kernel@vger.kernel.org
Subject: [PATCH] i3c: dw: reduce do_daa time if there's no client
Date: Mon,  3 Aug 2026 22:03:07 +0800	[thread overview]
Message-ID: <20260803140307.12665-1-jszhang@kernel.org> (raw)

If there's no client, wait for completion will timeout, then there's no
need to add i3c dev at all. This can save boot time by ~6s if there's
no client connected to the i3c interface.

Signed-off-by: Jisheng Zhang <jszhang@kernel.org>
---
 drivers/i3c/master/dw-i3c-master.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/i3c/master/dw-i3c-master.c b/drivers/i3c/master/dw-i3c-master.c
index 0625587f1527..18ebf304029a 100644
--- a/drivers/i3c/master/dw-i3c-master.c
+++ b/drivers/i3c/master/dw-i3c-master.c
@@ -885,8 +885,10 @@ static int dw_i3c_master_daa(struct i3c_master_controller *m)
 		      COMMAND_PORT_ROC;
 
 	dw_i3c_master_enqueue_xfer(master, xfer);
-	if (!wait_for_completion_timeout(&xfer->comp, XFER_TIMEOUT))
+	if (!wait_for_completion_timeout(&xfer->comp, XFER_TIMEOUT)) {
 		dw_i3c_master_dequeue_xfer(master, xfer);
+		goto rpm_out;
+	}
 
 	newdevs = GENMASK(master->maxdevs - cmd->rx_len - 1, 0);
 	newdevs &= ~olddevs;
-- 
2.53.0


             reply	other threads:[~2026-08-03 14:22 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-08-03 14:03 Jisheng Zhang [this message]
2026-08-03 14:03 ` [PATCH] i3c: dw: reduce do_daa time if there's no client Jisheng Zhang
2026-08-03 14:36 ` sashiko-bot
2026-08-05 20:05 ` Frank Li
2026-08-05 20:05   ` Frank Li

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20260803140307.12665-1-jszhang@kernel.org \
    --to=jszhang@kernel.org \
    --cc=Frank.Li@nxp.com \
    --cc=alexandre.belloni@bootlin.com \
    --cc=linux-i3c@lists.infradead.org \
    --cc=linux-kernel@vger.kernel.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.