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 BED5A2D1F40; Mon, 13 Oct 2025 15:16:18 +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=1760368578; cv=none; b=LE7iVvhmL4fKmQ7m+rEQQRRV3Q4ANsg08E2V2bxQ8pa2Suv9kkclTsKMXgU6QH0r4RfTKoeYSctSH89BZH50RwMxMMz9rvCFXi5UY7yHU4jBUiWBPuUR2td7EJFg3iUMyrMm2HBXNLTWvPm2VyCeeWMQyHH/m132vfj3ELnDLXU= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1760368578; c=relaxed/simple; bh=OtcU19aJ6Q893qs1s7j4TAgsA/ZPojm1bvJ7W6f1ciQ=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=HPDEvrvWZg5pa6qRi8oNouk9h4NK9tVvl9FkpyyMeIzP+fNQPJXr0UNs1jiGV7xfWbpM0/YEOJUKd+tyyXhAdTR+TJKhWICjQI0c6cnza29eeFLrEYDfgBsIWN3FFH9YogfxexGoSdVLvW7LvUqpxjhs6W5uEvymWzfmjiwHxT4= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=rydyKzEV; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="rydyKzEV" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 44DFEC4CEE7; Mon, 13 Oct 2025 15:16:18 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1760368578; bh=OtcU19aJ6Q893qs1s7j4TAgsA/ZPojm1bvJ7W6f1ciQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=rydyKzEVU25QrqpmFzL0HIB3jAPT5jcrE1abBzUhBT/vKPJdxC1Y+5haGTBrrbu+y v67uipP0hvzua/YbVrDPqOvmeoRVBQuyVIWMwvrt91DXdiX59F/+EEUXJDChkD8qUs c5hMqt0Qts4Zy9aEx9wo6BTat0hxwlNpknPYXv54= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Nishanth Menon , Alexander Sverdlin , Herbert Xu , Sasha Levin Subject: [PATCH 6.12 208/262] hwrng: ks-sa - fix division by zero in ks_sa_rng_init Date: Mon, 13 Oct 2025 16:45:50 +0200 Message-ID: <20251013144333.734940781@linuxfoundation.org> X-Mailer: git-send-email 2.51.0 In-Reply-To: <20251013144326.116493600@linuxfoundation.org> References: <20251013144326.116493600@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.12-stable review patch. If anyone has any objections, please let me know. ------------------ From: Nishanth Menon [ Upstream commit 612b1dfeb414dfa780a6316014ceddf9a74ff5c0 ] Fix division by zero in ks_sa_rng_init caused by missing clock pointer initialization. The clk_get_rate() call is performed on an uninitialized clk pointer, resulting in division by zero when calculating delay values. Add clock initialization code before using the clock. Fixes: 6d01d8511dce ("hwrng: ks-sa - Add minimum sleep time before ready-polling") Signed-off-by: Nishanth Menon drivers/char/hw_random/ks-sa-rng.c | 7 +++++++ 1 file changed, 7 insertions(+) Reviewed-by: Alexander Sverdlin Signed-off-by: Herbert Xu Signed-off-by: Sasha Levin --- drivers/char/hw_random/ks-sa-rng.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/char/hw_random/ks-sa-rng.c b/drivers/char/hw_random/ks-sa-rng.c index 36c34252b4f63..3c514b4fbc8ae 100644 --- a/drivers/char/hw_random/ks-sa-rng.c +++ b/drivers/char/hw_random/ks-sa-rng.c @@ -231,6 +231,10 @@ static int ks_sa_rng_probe(struct platform_device *pdev) if (IS_ERR(ks_sa_rng->regmap_cfg)) return dev_err_probe(dev, -EINVAL, "syscon_node_to_regmap failed\n"); + ks_sa_rng->clk = devm_clk_get_enabled(dev, NULL); + if (IS_ERR(ks_sa_rng->clk)) + return dev_err_probe(dev, PTR_ERR(ks_sa_rng->clk), "Failed to get clock\n"); + pm_runtime_enable(dev); ret = pm_runtime_resume_and_get(dev); if (ret < 0) { -- 2.51.0