From: Dan Carpenter <error27@gmail.com>
To: Jaroslav Kysela <perex@perex.cz>
Cc: alsa-devel@alsa-project.org, kernel-janitors@vger.kernel.org,
Takashi Iwai <tiwai@suse.com>, Maxime Ripard <mripard@kernel.org>,
linux-kernel@vger.kernel.org
Subject: [PATCH v2] ALSA: pci: lx6464es: fix a debug loop
Date: Tue, 31 Jan 2023 13:02:13 +0300 [thread overview]
Message-ID: <Y9jnJTis/mRFJAQp@kili> (raw)
This loop accidentally reuses the "i" iterator for both the inside and
the outside loop. The value of MAX_STREAM_BUFFER is 5. I believe that
chip->rmh.stat_len is in the 2-12 range. If the value of .stat_len is
4 or more then it will loop exactly one time, but if it's less then it
is a forever loop.
It looks like it was supposed to combined into one loop where
conditions are checked.
Fixes: 8e6320064c33 ("ALSA: lx_core: Remove useless #if 0 .. #endif")
Signed-off-by: Dan Carpenter <error27@gmail.com>
---
v2: In the first version I just deleted the outside loop but that was
not the correct fix. Combine the conditions instead.
sound/pci/lx6464es/lx_core.c | 11 +++++------
1 file changed, 5 insertions(+), 6 deletions(-)
diff --git a/sound/pci/lx6464es/lx_core.c b/sound/pci/lx6464es/lx_core.c
index d3f58a3d17fb..b5b0d43bb8dc 100644
--- a/sound/pci/lx6464es/lx_core.c
+++ b/sound/pci/lx6464es/lx_core.c
@@ -493,12 +493,11 @@ int lx_buffer_ask(struct lx6464es *chip, u32 pipe, int is_capture,
dev_dbg(chip->card->dev,
"CMD_08_ASK_BUFFERS: needed %d, freed %d\n",
*r_needed, *r_freed);
- for (i = 0; i < MAX_STREAM_BUFFER; ++i) {
- for (i = 0; i != chip->rmh.stat_len; ++i)
- dev_dbg(chip->card->dev,
- " stat[%d]: %x, %x\n", i,
- chip->rmh.stat[i],
- chip->rmh.stat[i] & MASK_DATA_SIZE);
+ for (i = 0; i < MAX_STREAM_BUFFER && i < chip->rmh.stat_len;
+ ++i) {
+ dev_dbg(chip->card->dev, " stat[%d]: %x, %x\n", i,
+ chip->rmh.stat[i],
+ chip->rmh.stat[i] & MASK_DATA_SIZE);
}
}
--
2.35.1
next reply other threads:[~2023-01-31 10:03 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-01-31 10:02 Dan Carpenter [this message]
2023-02-01 12:23 ` [PATCH v2] ALSA: pci: lx6464es: fix a debug loop Takashi Iwai
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