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Mon, 14 Aug 2023 14:59:02 -0700 (PDT) Date: Mon, 14 Aug 2023 21:58:56 +0000 Mime-Version: 1.0 X-B4-Tracking: v=1; b=H4sIAJ+j2mQC/x3MQQqDMBBA0avIrDuQaGzEqxQXMhl1NknJtEGQ3 L2pmw9v8y9QzsIKc3dB5iIqKTbYRwd0rHFnlNAMvekHM1mHJUlATd/4LyGlwKSYP+PTewwbGWf Jrn5w0BbvzJuc9/611PoDJW/zKm4AAAA= X-Developer-Key: i=justinstitt@google.com; a=ed25519; pk=tC3hNkJQTpNX/gLKxTNQKDmiQl6QjBNCGKJINqAdJsE= X-Developer-Signature: v=1; a=ed25519-sha256; t=1692050341; l=1438; i=justinstitt@google.com; s=20230717; h=from:subject:message-id; bh=/Kma0m/HdBNmCqOnMR7lPlA92je11aTwe8n3sswA/Rg=; b=xBHhDi4mcSlr1sHc0h4GlY4u8BBIj//mhzcKVjxHypIVM0sC61W4jIj4vp5C/DbjnfiDIyQ2c qFxpM+2gSL2BA2Du0iN4R9xa1TP1Ic5PCsa3aKdJslzaDOv6ZXIa91G X-Mailer: b4 0.12.3 Message-ID: <20230814-void-sound-soc-codecs-rt5677-v1-1-5c468c60fa37@google.com> Subject: [PATCH] ASoC: rt5677: fix -Wvoid-pointer-to-enum-cast warning From: Justin Stitt To: Oder Chiou , Liam Girdwood , Mark Brown , Jaroslav Kysela , Takashi Iwai Cc: alsa-devel@alsa-project.org, linux-kernel@vger.kernel.org, Nathan Chancellor , Justin Stitt Message-ID-Hash: 22BHRJ3PGGJDBSMUY4K36VHOQXVTG6EZ X-Message-ID-Hash: 22BHRJ3PGGJDBSMUY4K36VHOQXVTG6EZ X-MailFrom: 3pqPaZAsKCoUs312rw12r22pxxpun.lxvju1j-mn4nuju1j-y0xsnl2.x0p@flex--justinstitt.bounces.google.com X-Mailman-Rule-Misses: dmarc-mitigation; no-senders; approved; emergency; loop; banned-address; member-moderation; header-match-alsa-devel.alsa-project.org-0; header-match-alsa-devel.alsa-project.org-1; nonmember-moderation; administrivia; implicit-dest; max-recipients; max-size; news-moderation; no-subject; digests; suspicious-header X-Mailman-Version: 3.3.8 Precedence: list List-Id: "Alsa-devel mailing list for ALSA developers - http://www.alsa-project.org" Archived-At: List-Archive: List-Help: List-Owner: List-Post: List-Subscribe: List-Unsubscribe: `match_id->data` is a void* and as such is being truncated when cast to `enum rt5677_type` which is only int-width. There is likely no data loss occurring, though, as `enum rt5677_type` consists of only two fields from 0 to 1 wherein obviously no data loss happens from pointer-width -> int-width. Link: https://github.com/ClangBuiltLinux/linux/issues/1910 Reported-by: Nathan Chancellor Signed-off-by: Justin Stitt --- Note: I'm not sure if `uintptr_t` is the correct solution here as I've also seen a cast to `unsigned long` suffice. Any thoughts on the semantically correct option? --- sound/soc/codecs/rt5677.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- base-commit: 2ccdd1b13c591d306f0401d98dedc4bdcd02b421 change-id: 20230814-void-sound-soc-codecs-rt5677-dfc041c1a734 Best regards, -- Justin Stitt diff --git a/sound/soc/codecs/rt5677.c b/sound/soc/codecs/rt5677.c index ad14d18860fc..278cb0b265e5 100644 --- a/sound/soc/codecs/rt5677.c +++ b/sound/soc/codecs/rt5677.c @@ -5578,7 +5578,7 @@ static int rt5677_i2c_probe(struct i2c_client *i2c) match_id = of_match_device(rt5677_of_match, &i2c->dev); if (match_id) - rt5677->type = (enum rt5677_type)match_id->data; + rt5677->type = (uintptr_t)match_id->data; } else if (ACPI_HANDLE(&i2c->dev)) { const struct acpi_device_id *acpi_id;