From: david.laight.linux@gmail.com
To: linux-kernel@vger.kernel.org, linux-i2c@vger.kernel.org
Cc: Andi Shyti <andi.shyti@kernel.org>,
Mika Westerberg <mika.westerberg@linux.intel.com>,
David Laight <david.laight.linux@gmail.com>
Subject: [PATCH 20/44] drivers/i2c/busses: use min() instead of min_t()
Date: Wed, 19 Nov 2025 22:41:16 +0000 [thread overview]
Message-ID: <20251119224140.8616-21-david.laight.linux@gmail.com> (raw)
In-Reply-To: <20251119224140.8616-1-david.laight.linux@gmail.com>
From: David Laight <david.laight.linux@gmail.com>
min_t(u8, a, b) casts both its arguments to u8 potentially discarding
signifinact bits.
Use min(a, b) instead as it cannot discard significant bits.
Detected by an extra check added to min_t().
Signed-off-by: David Laight <david.laight.linux@gmail.com>
---
drivers/i2c/busses/i2c-designware-master.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/i2c/busses/i2c-designware-master.c b/drivers/i2c/busses/i2c-designware-master.c
index 41e9b5ecad20..8fc51d472a55 100644
--- a/drivers/i2c/busses/i2c-designware-master.c
+++ b/drivers/i2c/busses/i2c-designware-master.c
@@ -564,7 +564,7 @@ i2c_dw_recv_len(struct dw_i2c_dev *dev, u8 len)
* after receiving the first byte.
*/
len += (flags & I2C_CLIENT_PEC) ? 2 : 1;
- dev->tx_buf_len = len - min_t(u8, len, dev->rx_outstanding);
+ dev->tx_buf_len = len - min(len, dev->rx_outstanding);
msgs[dev->msg_read_idx].len = len;
msgs[dev->msg_read_idx].flags &= ~I2C_M_RECV_LEN;
--
2.39.5
next prev parent reply other threads:[~2025-11-19 22:42 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-11-19 22:40 [PATCH 00/44] Change a lot of min_t() that might mask high bits david.laight.linux
2025-11-19 22:41 ` david.laight.linux [this message]
2026-01-20 13:19 ` [PATCH 20/44] drivers/i2c/busses: use min() instead of min_t() Andi Shyti
2025-11-20 1:47 ` [PATCH 00/44] Change a lot of min_t() that might mask high bits Jakub Kicinski
2025-11-20 9:38 ` Lorenzo Stoakes
2025-11-20 14:52 ` (subset) " Jens Axboe
2025-11-24 9:49 ` Herbert Xu
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=20251119224140.8616-21-david.laight.linux@gmail.com \
--to=david.laight.linux@gmail.com \
--cc=andi.shyti@kernel.org \
--cc=linux-i2c@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=mika.westerberg@linux.intel.com \
/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 a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox