From: Dan Carpenter <dan.carpenter@oracle.com>
To: Kalle Valo <kvalo@codeaurora.org>
Cc: kernel-janitors@vger.kernel.org, linux-wireless@vger.kernel.org,
Michael Buesch <mb@bu3sch.de>,
b43-dev@lists.infradead.org
Subject: [PATCH 2/2] b43: fix a lower bounds test
Date: Wed, 6 Oct 2021 10:36:22 +0300 [thread overview]
Message-ID: <20211006073621.GE8404@kili> (raw)
In-Reply-To: <20211006073542.GD8404@kili>
The problem is that "channel" is an unsigned int, when it's less 5 the
value of "channel - 5" is not a negative number as one would expect but
is very high positive value instead.
This means that "start" becomes a very high positive value. The result
of that is that we never enter the "for (i = start; i <= end; i++) {"
loop. Instead of storing the result from b43legacy_radio_aci_detect()
it just uses zero.
Fixes: ef1a628d83fc ("b43: Implement dynamic PHY API")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
---
drivers/net/wireless/broadcom/b43/phy_g.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/net/wireless/broadcom/b43/phy_g.c b/drivers/net/wireless/broadcom/b43/phy_g.c
index d5a1a5c58236..ac72ca39e409 100644
--- a/drivers/net/wireless/broadcom/b43/phy_g.c
+++ b/drivers/net/wireless/broadcom/b43/phy_g.c
@@ -2297,7 +2297,7 @@ static u8 b43_gphy_aci_scan(struct b43_wldev *dev)
b43_phy_mask(dev, B43_PHY_G_CRS, 0x7FFF);
b43_set_all_gains(dev, 3, 8, 1);
- start = (channel - 5 > 0) ? channel - 5 : 1;
+ start = (channel > 5) ? channel - 5 : 1;
end = (channel + 5 < 14) ? channel + 5 : 13;
for (i = start; i <= end; i++) {
--
2.20.1
_______________________________________________
b43-dev mailing list
b43-dev@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/b43-dev
next prev parent reply other threads:[~2021-10-06 7:38 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-10-06 7:35 [PATCH 1/2] b43legacy: fix a lower bounds test Dan Carpenter
2021-10-06 7:36 ` Dan Carpenter [this message]
2021-10-06 16:13 ` [PATCH 2/2] b43: " Michael Büsch
2021-10-06 16:13 ` [PATCH 1/2] b43legacy: " Michael Büsch
2021-10-11 6:09 ` Kalle Valo
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=20211006073621.GE8404@kili \
--to=dan.carpenter@oracle.com \
--cc=b43-dev@lists.infradead.org \
--cc=kernel-janitors@vger.kernel.org \
--cc=kvalo@codeaurora.org \
--cc=linux-wireless@vger.kernel.org \
--cc=mb@bu3sch.de \
/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;
as well as URLs for NNTP newsgroup(s).