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 B7B882ED168; Thu, 3 Jul 2025 15:05:39 +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=1751555139; cv=none; b=FM8gm2bdDTGTi0ogoCk0Pb1zo8Yq9sWjsUe/Krx/nq4ix3lOrLYpPtVZYrmkJ0wpAHattkZTQJZnuApAf7kce70bh18Q79IezIgIDEEN9VLkoMZxhoNj2Un3jiFh0pNomm2hwge9w7N3v0uwutdHZhQSZJFUQvzhPPcGqFWcCMM= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1751555139; c=relaxed/simple; bh=Fk65W1f2+l62oT3dOo8gebEssj+U1Y4WWIBvCz8s/Vc=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=SrnobJkS3emxcbnq3goiSfMFsQKdK4vhFCShKcMiKDE6cLS1goHMgASLQ5VmEYG0M+W+YV77jzcPaOqCor+KlZ6AoFNBwGFWsNLUckeest1xu8JWACkqXgLKiNo+seBoJGMASqQEU6bnPPWiXS56yYfwLqFYRkO8WVGXtDIcRIA= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=npaexhmW; 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="npaexhmW" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 29B3AC4CEE3; Thu, 3 Jul 2025 15:05:38 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1751555139; bh=Fk65W1f2+l62oT3dOo8gebEssj+U1Y4WWIBvCz8s/Vc=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=npaexhmWZ/koXjhirFquzkwOsPp1rtkE8uwr0cvx5uP7RmyEr0XLDNhkODRcrygh3 Ypr3tLduAGnrI+YxlieoKkFCWTYHUVlmhc1d0TyZcCArrVVvBZTtNZl+159aYzmGfi fsumNLQ9t003JbVJfTdgSRw+yhLXuZi6swREQFR0= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Khairul Anuar Romli , Matthew Gerlach , Mark Brown Subject: [PATCH 6.15 186/263] spi: spi-cadence-quadspi: Fix pm runtime unbalance Date: Thu, 3 Jul 2025 16:41:46 +0200 Message-ID: <20250703144011.798367838@linuxfoundation.org> X-Mailer: git-send-email 2.50.0 In-Reply-To: <20250703144004.276210867@linuxfoundation.org> References: <20250703144004.276210867@linuxfoundation.org> User-Agent: quilt/0.68 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 6.15-stable review patch. If anyone has any objections, please let me know. ------------------ From: Khairul Anuar Romli commit b07f349d1864abe29436f45e3047da2bdd476462 upstream. Having PM put sync in remove function is causing PM underflow during remove operation. This is caused by the function, runtime_pm_get_sync, not being called anywhere during the op. Ensure that calls to pm_runtime_enable()/pm_runtime_disable() and pm_runtime_get_sync()/pm_runtime_put_sync() match. echo 108d2000.spi > /sys/bus/platform/drivers/cadence-qspi/unbind [ 49.644256] Deleting MTD partitions on "108d2000.spi.0": [ 49.649575] Deleting u-boot MTD partition [ 49.684087] Deleting root MTD partition [ 49.724188] cadence-qspi 108d2000.spi: Runtime PM usage count underflow! Continuous bind/unbind will result in an "Unbalanced pm_runtime_enable" error. Subsequent unbind attempts will return a "No such device" error, while bind attempts will return a "Resource temporarily unavailable" error. [ 47.592434] cadence-qspi 108d2000.spi: Runtime PM usage count underflow! [ 49.592233] cadence-qspi 108d2000.spi: detected FIFO depth (1024) different from config (128) [ 53.232309] cadence-qspi 108d2000.spi: Runtime PM usage count underflow! [ 55.828550] cadence-qspi 108d2000.spi: detected FIFO depth (1024) different from config (128) [ 57.940627] cadence-qspi 108d2000.spi: Runtime PM usage count underflow! [ 59.912490] cadence-qspi 108d2000.spi: detected FIFO depth (1024) different from config (128) [ 61.876243] cadence-qspi 108d2000.spi: Runtime PM usage count underflow! [ 61.883000] platform 108d2000.spi: Unbalanced pm_runtime_enable! [ 532.012270] cadence-qspi 108d2000.spi: probe with driver cadence-qspi failed1 Also, change clk_disable_unprepare() to clk_disable() since continuous bind and unbind operations will trigger a warning indicating that the clock is already unprepared. Fixes: 4892b374c9b7 ("mtd: spi-nor: cadence-quadspi: Add runtime PM support") cc: stable@vger.kernel.org # 6.6+ Signed-off-by: Khairul Anuar Romli Reviewed-by: Matthew Gerlach Link: https://patch.msgid.link/4e7a4b8aba300e629b45a04f90bddf665fbdb335.1749601877.git.khairul.anuar.romli@altera.com Signed-off-by: Mark Brown Signed-off-by: Greg Kroah-Hartman --- drivers/spi/spi-cadence-quadspi.c | 12 +++++++----- 1 file changed, 7 insertions(+), 5 deletions(-) --- a/drivers/spi/spi-cadence-quadspi.c +++ b/drivers/spi/spi-cadence-quadspi.c @@ -1958,10 +1958,10 @@ static int cqspi_probe(struct platform_d goto probe_setup_failed; } - ret = devm_pm_runtime_enable(dev); - if (ret) { - if (cqspi->rx_chan) - dma_release_channel(cqspi->rx_chan); + pm_runtime_enable(dev); + + if (cqspi->rx_chan) { + dma_release_channel(cqspi->rx_chan); goto probe_setup_failed; } @@ -1981,6 +1981,7 @@ static int cqspi_probe(struct platform_d return 0; probe_setup_failed: cqspi_controller_enable(cqspi, 0); + pm_runtime_disable(dev); probe_reset_failed: if (cqspi->is_jh7110) cqspi_jh7110_disable_clk(pdev, cqspi); @@ -1999,7 +2000,8 @@ static void cqspi_remove(struct platform if (cqspi->rx_chan) dma_release_channel(cqspi->rx_chan); - clk_disable_unprepare(cqspi->clk); + if (pm_runtime_get_sync(&pdev->dev) >= 0) + clk_disable(cqspi->clk); if (cqspi->is_jh7110) cqspi_jh7110_disable_clk(pdev, cqspi);