Re: [PATCH] ALSA: hda: generic: Remove redundant assignment to dac and dacs[i]

From: Amadeusz Sławiński
Date: Mon May 10 2021 - 08:02:42 EST

On 5/10/2021 12:41 PM, Jiapeng Chong wrote:
Variable dac and dacs[i] is set to zero, but this value is never read as
it is overwritten or not used later on, hence it is a redundant assignment
and can be removed.

Clean up the following clang-analyzer warning:

sound/pci/hda/hda_generic.c:1436:4: warning: Value stored to 'dac' is
never read [clang-analyzer-deadcode.DeadStores].

Reported-by: Abaci Robot <abaci@xxxxxxxxxxxxxxxxx>
Signed-off-by: Jiapeng Chong <jiapeng.chong@xxxxxxxxxxxxxxxxx>
sound/pci/hda/hda_generic.c | 1 -
1 file changed, 1 deletion(-)

diff --git a/sound/pci/hda/hda_generic.c b/sound/pci/hda/hda_generic.c
index b638fc2..cce1bf7 100644
--- a/sound/pci/hda/hda_generic.c
+++ b/sound/pci/hda/hda_generic.c
@@ -1433,7 +1433,6 @@ static int try_assign_dacs(struct hda_codec *codec, int num_outs,
path = snd_hda_add_new_path(codec, dac, pin, 0);
if (!path) {
- dac = dacs[i] = 0;
badness += bad->no_dac;
} else {
/* print_nid_path(codec, "output", path); */

Not entirely true... dacs is passed by pointer, so value assigned to it can be used somewhere else.