From: Adrian Hunter <adrian.hunter@intel.com>
To: alexandre.belloni@bootlin.com
Cc: Frank.Li@nxp.com, akhilrajeev@nvidia.com,
mukesh.savaliya@oss.qualcomm.com, rafael@kernel.org,
linux-i3c@lists.infradead.org, linux-kernel@vger.kernel.org,
linux-pci@vger.kernel.org, linux-pm@vger.kernel.org
Subject: [PATCH V4 05/14] i3c: Make dev->desc locking assumptions explicit
Date: Thu, 6 Aug 2026 16:18:48 +0300 [thread overview]
Message-ID: <20260806131857.119830-6-adrian.hunter@intel.com> (raw)
In-Reply-To: <20260806131857.119830-1-adrian.hunter@intel.com>
i3c_device_get_info() takes the bus normal-use lock before accessing
dev->desc. Under that lock, the descriptor pointer is guaranteed to be
valid for the duration of the access.
Remove the unnecessary NULL check on dev->desc so the code more clearly
reflects the locking rules and expected descriptor lifetime.
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Acked-by: Mukesh Savaliya <mukesh.savaliya@oss.qualcomm.com>
---
Changes in V4:
Added Mukesh's Acked-by tag
Changes in V3:
New patch
drivers/i3c/device.c | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)
diff --git a/drivers/i3c/device.c b/drivers/i3c/device.c
index a3778282e84c..5e6df6de0283 100644
--- a/drivers/i3c/device.c
+++ b/drivers/i3c/device.c
@@ -101,8 +101,7 @@ void i3c_device_get_info(const struct i3c_device *dev,
return;
i3c_bus_normaluse_lock(dev->bus);
- if (dev->desc)
- *info = dev->desc->info;
+ *info = dev->desc->info;
i3c_bus_normaluse_unlock(dev->bus);
}
EXPORT_SYMBOL_GPL(i3c_device_get_info);
--
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: Adrian Hunter <adrian.hunter@intel.com>
To: alexandre.belloni@bootlin.com
Cc: Frank.Li@nxp.com, akhilrajeev@nvidia.com,
mukesh.savaliya@oss.qualcomm.com, rafael@kernel.org,
linux-i3c@lists.infradead.org, linux-kernel@vger.kernel.org,
linux-pci@vger.kernel.org, linux-pm@vger.kernel.org
Subject: [PATCH V4 05/14] i3c: Make dev->desc locking assumptions explicit
Date: Thu, 6 Aug 2026 16:18:48 +0300 [thread overview]
Message-ID: <20260806131857.119830-6-adrian.hunter@intel.com> (raw)
In-Reply-To: <20260806131857.119830-1-adrian.hunter@intel.com>
i3c_device_get_info() takes the bus normal-use lock before accessing
dev->desc. Under that lock, the descriptor pointer is guaranteed to be
valid for the duration of the access.
Remove the unnecessary NULL check on dev->desc so the code more clearly
reflects the locking rules and expected descriptor lifetime.
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Acked-by: Mukesh Savaliya <mukesh.savaliya@oss.qualcomm.com>
---
Changes in V4:
Added Mukesh's Acked-by tag
Changes in V3:
New patch
drivers/i3c/device.c | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)
diff --git a/drivers/i3c/device.c b/drivers/i3c/device.c
index a3778282e84c..5e6df6de0283 100644
--- a/drivers/i3c/device.c
+++ b/drivers/i3c/device.c
@@ -101,8 +101,7 @@ void i3c_device_get_info(const struct i3c_device *dev,
return;
i3c_bus_normaluse_lock(dev->bus);
- if (dev->desc)
- *info = dev->desc->info;
+ *info = dev->desc->info;
i3c_bus_normaluse_unlock(dev->bus);
}
EXPORT_SYMBOL_GPL(i3c_device_get_info);
--
2.53.0
next prev parent reply other threads:[~2026-08-06 13:19 UTC|newest]
Thread overview: 92+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-08-06 13:18 [PATCH V4 00/14] i3c: Support IBI-based system wakeup Adrian Hunter
2026-08-06 13:18 ` Adrian Hunter
2026-08-06 13:18 ` [PATCH V4 01/14] i3c: master: Fix recursive locking during device registration Adrian Hunter
2026-08-06 13:18 ` Adrian Hunter
2026-08-06 13:39 ` sashiko-bot
2026-08-06 13:39 ` sashiko-bot
2026-08-06 16:46 ` Adrian Hunter
2026-08-06 16:46 ` Adrian Hunter
2026-08-06 18:24 ` Frank Li
2026-08-06 18:24 ` Frank Li
2026-08-06 13:18 ` [PATCH V4 02/14] i3c: Fix unlocked dereference of dev->desc in i3c_device_get_supported_xfer_mode() Adrian Hunter
2026-08-06 13:18 ` Adrian Hunter
2026-08-06 13:38 ` sashiko-bot
2026-08-06 13:38 ` sashiko-bot
2026-08-06 18:26 ` Frank Li
2026-08-06 18:26 ` Frank Li
2026-08-06 13:18 ` [PATCH V4 03/14] i3c: master: Do not treat master device as a duplicate target Adrian Hunter
2026-08-06 13:18 ` Adrian Hunter
2026-08-06 13:40 ` sashiko-bot
2026-08-06 13:40 ` sashiko-bot
2026-08-06 13:18 ` [PATCH V4 04/14] i3c: master: Fix use-after-free of master->this Adrian Hunter
2026-08-06 13:18 ` Adrian Hunter
2026-08-06 13:39 ` sashiko-bot
2026-08-06 13:39 ` sashiko-bot
2026-08-06 18:30 ` Frank Li
2026-08-06 18:30 ` Frank Li
2026-08-06 13:18 ` Adrian Hunter [this message]
2026-08-06 13:18 ` [PATCH V4 05/14] i3c: Make dev->desc locking assumptions explicit Adrian Hunter
2026-08-06 13:39 ` sashiko-bot
2026-08-06 13:39 ` sashiko-bot
2026-08-06 18:31 ` Frank Li
2026-08-06 18:31 ` Frank Li
2026-08-06 13:18 ` [PATCH V4 06/14] i3c: master: Fix potential UAF in i3c_device_uevent() Adrian Hunter
2026-08-06 13:18 ` Adrian Hunter
2026-08-06 13:34 ` sashiko-bot
2026-08-06 13:34 ` sashiko-bot
2026-08-06 18:33 ` Frank Li
2026-08-06 18:33 ` Frank Li
2026-08-06 13:18 ` [PATCH V4 07/14] i3c: master: Fix potential UAF in i3c_device_match() Adrian Hunter
2026-08-06 13:18 ` Adrian Hunter
2026-08-06 13:45 ` sashiko-bot
2026-08-06 13:45 ` sashiko-bot
2026-08-06 17:13 ` Adrian Hunter
2026-08-06 17:13 ` Adrian Hunter
2026-08-06 13:18 ` [PATCH V4 08/14] i3c: master: Support IBI-based wakeup capability Adrian Hunter
2026-08-06 13:18 ` Adrian Hunter
2026-08-06 13:31 ` sashiko-bot
2026-08-06 13:31 ` sashiko-bot
2026-08-06 18:58 ` Mukesh Savaliya
2026-08-06 18:58 ` Mukesh Savaliya
2026-08-06 13:18 ` [PATCH V4 09/14] i3c: master: Report wakeup events for IBIs Adrian Hunter
2026-08-06 13:18 ` Adrian Hunter
2026-08-06 13:49 ` sashiko-bot
2026-08-06 13:49 ` sashiko-bot
2026-08-06 17:16 ` Adrian Hunter
2026-08-06 17:16 ` Adrian Hunter
2026-08-06 18:35 ` Frank Li
2026-08-06 18:35 ` Frank Li
2026-08-06 13:18 ` [PATCH V4 10/14] i3c: master: Add helper to query bus wakeup requirements Adrian Hunter
2026-08-06 13:18 ` Adrian Hunter
2026-08-06 13:29 ` sashiko-bot
2026-08-06 13:29 ` sashiko-bot
2026-08-06 18:46 ` Frank Li
2026-08-06 18:46 ` Frank Li
2026-08-06 19:03 ` Mukesh Savaliya
2026-08-06 19:03 ` Mukesh Savaliya
2026-08-06 13:18 ` [PATCH V4 11/14] i3c: master: Reject IBI requests from non-IBI-capable devices Adrian Hunter
2026-08-06 13:18 ` Adrian Hunter
2026-08-06 13:41 ` sashiko-bot
2026-08-06 13:41 ` sashiko-bot
2026-08-06 13:18 ` [PATCH V4 12/14] i3c: mipi-i3c-hci-pci: Propagate I3C wakeup requirements to PCI Adrian Hunter
2026-08-06 13:18 ` Adrian Hunter
2026-08-06 13:56 ` sashiko-bot
2026-08-06 13:56 ` sashiko-bot
2026-08-06 17:20 ` Adrian Hunter
2026-08-06 17:20 ` Adrian Hunter
2026-08-06 18:42 ` Frank Li
2026-08-06 18:42 ` Frank Li
2026-08-06 13:18 ` [PATCH V4 13/14] i3c: mipi-i3c-hci: Factor out i3c_hci_sysdev() Adrian Hunter
2026-08-06 13:18 ` Adrian Hunter
2026-08-06 13:46 ` sashiko-bot
2026-08-06 13:46 ` sashiko-bot
2026-08-06 18:44 ` Frank Li
2026-08-06 18:44 ` Frank Li
2026-08-06 19:07 ` Mukesh Savaliya
2026-08-06 19:07 ` Mukesh Savaliya
2026-08-06 13:18 ` [PATCH V4 14/14] i3c: mipi-i3c-hci: Advertise IBI wakeup capability Adrian Hunter
2026-08-06 13:18 ` Adrian Hunter
2026-08-06 13:54 ` sashiko-bot
2026-08-06 13:54 ` sashiko-bot
2026-08-06 17:37 ` Adrian Hunter
2026-08-06 17:37 ` Adrian Hunter
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=20260806131857.119830-6-adrian.hunter@intel.com \
--to=adrian.hunter@intel.com \
--cc=Frank.Li@nxp.com \
--cc=akhilrajeev@nvidia.com \
--cc=alexandre.belloni@bootlin.com \
--cc=linux-i3c@lists.infradead.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-pci@vger.kernel.org \
--cc=linux-pm@vger.kernel.org \
--cc=mukesh.savaliya@oss.qualcomm.com \
--cc=rafael@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.