From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id E51552C17A9; Mon, 5 May 2025 22:49:34 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1746485375; cv=none; b=Rr4/MIpUFHgb8kKoTI6W9m7JgHBXUzB/rtGdXDotj/P5mCVOmrFc2N4hyFOaFaKlAFLL4oLkkakU34uK73GpHzwjU75XyS1GtrIxencAzttkLPX7Od0GOlVHISmj8lIUClQt1HKLuDXkje2JAvxDQlITGtejP5AADJbUMVUtg28= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1746485375; c=relaxed/simple; bh=ya6bTDMEoKFuM8nw+msw5m2ONCtsb+u6tThQg0e0PIg=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=tPMEUtdTMWPW8IsbeFWXGpgZGwyl7CKSWDzn0zDKEF+sToXd6pfS5rVl9YpSQfsd2AomCB3azX8p3P1sl1xJN4Q7yBc4EWr+OGRuIn3IqO5OryXIvqZ9QRdWRwwAaBbXakybc5JQ2daVSRNdJttpkY5nplCQH055AKeEirDpLTY= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=MGy3ZaX8; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="MGy3ZaX8" Received: by smtp.kernel.org (Postfix) with ESMTPSA id C905FC4CEEF; Mon, 5 May 2025 22:49:33 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1746485374; bh=ya6bTDMEoKFuM8nw+msw5m2ONCtsb+u6tThQg0e0PIg=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=MGy3ZaX8mi7FayECjksrHygh/GTA6BS9K371B2QvwKFJC95txDHfNk6xcBAiEnemW EvX7iZoPQubN4OjYop/jrmCzGoeqSmWfPl6OUP6XAeeIqu/UcfyE5FmlzO08UssTL9 uef4ZwJPMd7G6ebQ1gtaA37mv28qAHoiL1uP2AkG26F7IG2trnHpJUPv0pSUOmdPiO H11wFdWQSHj+e0Vz0YZAwrg7GX2uFwfyEWNK04gx5MaiuBhMR9Jfx6W3M4QfadnGld rgZ3EYsW7k46XjfcV2weooX9Ym7zACF2ohWEeHT59A98F9bBm9z/CxE6U5WFau59ta L4DMDs4+0F4iQ== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Eddie James , Greg Kroah-Hartman , Sasha Levin , W_Armin@gmx.de, linux@roeck-us.net, dan.carpenter@linaro.org, u.kleine-koenig@pengutronix.de Subject: [PATCH AUTOSEL 6.12 297/486] eeprom: ee1004: Check chip before probing Date: Mon, 5 May 2025 18:36:13 -0400 Message-Id: <20250505223922.2682012-297-sashal@kernel.org> X-Mailer: git-send-email 2.39.5 In-Reply-To: <20250505223922.2682012-1-sashal@kernel.org> References: <20250505223922.2682012-1-sashal@kernel.org> Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore X-stable-base: Linux 6.12.26 Content-Transfer-Encoding: 8bit From: Eddie James [ Upstream commit d9406677428e9234ea62bb2d2f5e996d1b777760 ] Like other eeprom drivers, check if the device is really there and functional before probing. Signed-off-by: Eddie James Link: https://lore.kernel.org/r/20250218220959.721698-1-eajames@linux.ibm.com Signed-off-by: Greg Kroah-Hartman Signed-off-by: Sasha Levin --- drivers/misc/eeprom/ee1004.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/misc/eeprom/ee1004.c b/drivers/misc/eeprom/ee1004.c index 89224d4af4a20..e13f9fdd9d7b1 100644 --- a/drivers/misc/eeprom/ee1004.c +++ b/drivers/misc/eeprom/ee1004.c @@ -304,6 +304,10 @@ static int ee1004_probe(struct i2c_client *client) I2C_FUNC_SMBUS_BYTE | I2C_FUNC_SMBUS_READ_BYTE_DATA)) return -EPFNOSUPPORT; + err = i2c_smbus_read_byte(client); + if (err < 0) + return -ENODEV; + mutex_lock(&ee1004_bus_lock); err = ee1004_init_bus_data(client); -- 2.39.5