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 C92F82210DE; Thu, 12 Dec 2024 16:58:55 +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=1734022735; cv=none; b=MGszaJBLElnvRgxTiU5s15KBrNxvVblgCaFPZ8Wvz3wxAxA0mAGiaVzAYLb1CCwQwSz2v0VOjnDYaetUkCs0kxdlNfojyCnsWAb5pMFDSoqYKOGExiwr1gVwxZbipslYD/8oCadGdIHKhbblfVBViFfWSk5Jb1iJv6AWUdkqIkU= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1734022735; c=relaxed/simple; bh=goGLZfXYMPwd25X+e7g/FvglsKC0wYFvabcMj6jak/s=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=ArSD2O6DKZLQ4H6API9tX+QkBrYa5oR6zuQDpRwGTErTIab6EkZTuhvurcbLPne9uSBsbKjyIBhr9X9dt7lmXLqhG003/CXgOS8+GfbujRp1qUZx9A3GoXpDjCjsLF/hdoI/61Z/fkWEjQQjX6LApPmortBXu5p0qI5dmXxtdwA= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=BWpKK8Kn; 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="BWpKK8Kn" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 3A1C3C4CECE; Thu, 12 Dec 2024 16:58:55 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1734022735; bh=goGLZfXYMPwd25X+e7g/FvglsKC0wYFvabcMj6jak/s=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=BWpKK8KnKo7X6fkFesw6Jr6FmBCoupwQHksvcBtWW0KzlbdNG3UMNGHrOppcS5XTD iW6pTtPywu5KezGDUspvPwhix6dAKs612HXm0Ho9l1OKAVDSg7CjAEvxFnAxISuxLw VQEWGrpFyiIOhPbavwJJ5GhjOb2ebHw8K+xwLlnQ= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Jiasheng Jiang , William Breathitt Gray , Sasha Levin Subject: [PATCH 5.15 292/565] counter: stm32-timer-cnt: Add check for clk_enable() Date: Thu, 12 Dec 2024 15:58:07 +0100 Message-ID: <20241212144323.009749666@linuxfoundation.org> X-Mailer: git-send-email 2.47.1 In-Reply-To: <20241212144311.432886635@linuxfoundation.org> References: <20241212144311.432886635@linuxfoundation.org> User-Agent: quilt/0.67 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 5.15-stable review patch. If anyone has any objections, please let me know. ------------------ From: Jiasheng Jiang [ Upstream commit 842c3755a6bfbfcafa4a1438078d2485a9eb1d87 ] Add check for the return value of clk_enable() in order to catch the potential exception. Fixes: c5b8425514da ("counter: stm32-timer-cnt: add power management support") Fixes: ad29937e206f ("counter: Add STM32 Timer quadrature encoder") Signed-off-by: Jiasheng Jiang Link: https://lore.kernel.org/r/20241104191825.40155-1-jiashengjiangcool@gmail.com Signed-off-by: William Breathitt Gray Signed-off-by: Sasha Levin --- drivers/counter/stm32-timer-cnt.c | 16 +++++++++++++--- 1 file changed, 13 insertions(+), 3 deletions(-) diff --git a/drivers/counter/stm32-timer-cnt.c b/drivers/counter/stm32-timer-cnt.c index 0546e932db0c1..8d668d5cfd0df 100644 --- a/drivers/counter/stm32-timer-cnt.c +++ b/drivers/counter/stm32-timer-cnt.c @@ -196,11 +196,17 @@ static int stm32_count_enable_write(struct counter_device *counter, { struct stm32_timer_cnt *const priv = counter->priv; u32 cr1; + int ret; if (enable) { regmap_read(priv->regmap, TIM_CR1, &cr1); - if (!(cr1 & TIM_CR1_CEN)) - clk_enable(priv->clk); + if (!(cr1 & TIM_CR1_CEN)) { + ret = clk_enable(priv->clk); + if (ret) { + dev_err(counter->parent, "Cannot enable clock %d\n", ret); + return ret; + } + } regmap_update_bits(priv->regmap, TIM_CR1, TIM_CR1_CEN, TIM_CR1_CEN); @@ -374,7 +380,11 @@ static int __maybe_unused stm32_timer_cnt_resume(struct device *dev) return ret; if (priv->enabled) { - clk_enable(priv->clk); + ret = clk_enable(priv->clk); + if (ret) { + dev_err(dev, "Cannot enable clock %d\n", ret); + return ret; + } /* Restore registers that may have been lost */ regmap_write(priv->regmap, TIM_SMCR, priv->bak.smcr); -- 2.43.0