linux-kernel - [PATCH v2 1/2] clk: qcom: clk-rcg2: Update the calc

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Date:   Wed,  2 Feb 2022 23:12:12 +0530
From:   Taniya Das <tdas@...eaurora.org>
To:     Stephen Boyd <sboyd@...nel.org>,
        Michael Turquette   <mturquette@...libre.com>
Cc:     Rajendra Nayak <rnayak@...eaurora.org>,
        linux-arm-msm@...r.kernel.org, linux-soc@...r.kernel.org,
        linux-clk@...r.kernel.org, linux-kernel@...r.kernel.org,
        devicetree@...r.kernel.org, Taniya Das <tdas@...eaurora.org>
Subject: [PATCH v2 1/2] clk: qcom: clk-rcg2: Update the calc_rate logic to handle determine rate

In the cases where the RCG parent implements the determine rate ops, the
calc_rate needs to be updated the calculate the rate.

Fixes: bcd61c0f535a0 ("clk: qcom: Add support for root clock generators (RCGs)")
Signed-off-by: Taniya Das <tdas@...eaurora.org>
---
 * Split the patch for PLL and RCG.
 * Update the Fixes tag.

 drivers/clk/qcom/clk-rcg2.c | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/drivers/clk/qcom/clk-rcg2.c b/drivers/clk/qcom/clk-rcg2.c
index e1b1b426fae4..2e120a6dd19a 100644
--- a/drivers/clk/qcom/clk-rcg2.c
+++ b/drivers/clk/qcom/clk-rcg2.c
@@ -147,19 +147,19 @@ static int clk_rcg2_set_parent(struct clk_hw *hw, u8 index)
 static unsigned long
 calc_rate(unsigned long rate, u32 m, u32 n, u32 mode, u32 hid_div)
 {
+	u64 tmp = rate;
+
 	if (hid_div) {
-		rate *= 2;
-		rate /= hid_div + 1;
+		tmp *= 2;
+		do_div(tmp, hid_div + 1);
 	}

 	if (mode) {
-		u64 tmp = rate;
 		tmp *= m;
 		do_div(tmp, n);
-		rate = tmp;
 	}

-	return rate;
+	return tmp;
 }

 static unsigned long
--
Qualcomm INDIA, on behalf of Qualcomm Innovation Center, Inc.is a member
of the Code Aurora Forum, hosted by the  Linux Foundation.