From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-pf1-f171.google.com (mail-pf1-f171.google.com [209.85.210.171]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 666607080D for ; Thu, 23 Jul 2026 00:12:13 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.210.171 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1784765534; cv=none; b=vBC112Bk7pSsOF+QaCys+WfWAyA7KL5DDNWz68a7bpaOJDQ35KgWcpzUSOrHACqsjCTW+MREW5W8LS/3InDClJL8zi4qEWxHJx8DdJMSvJ6tExANSYp+kfN5L+i823mTIi4DoasRfRrKaDAL1AzykoHxyHbAReOaHPxO8/1lQ6Y= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1784765534; c=relaxed/simple; bh=R6VFjLoew43DjorRPLUqnwrrULmQKOSLr1IATedYfOw=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=JqbvT2Jbr19NA/iqGYdUe5uQlSA29eEBtW/FN2l85zdjqWoz0uMiQ+zjnicC8uZtoqva1DZiwkh9dFTFScmtlfY5k8y5VhLNCa0cWSiD8UYDoBCEqh54Ga1HdhDR+j5Mgut9d2Q9KzMFr6io8K7jls7Aru60RHgKdAtQEnwmb20= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com; spf=pass smtp.mailfrom=gmail.com; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b=TKrw9zN7; arc=none smtp.client-ip=209.85.210.171 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="TKrw9zN7" Received: by mail-pf1-f171.google.com with SMTP id d2e1a72fcca58-84830c774a0so38600b3a.1 for ; Wed, 22 Jul 2026 17:12:13 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20251104; t=1784765533; x=1785370333; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to:content-type; bh=UtrGfCC98mn5vA02LN8CzZjl6C4GThAo3sAWaEwlL/c=; b=TKrw9zN7BAD5MBRy76xG42MgtE6/wv0jrA2jDJxTmv9g1ejQsPAFHzoI9QAkivpufH lbNxp8NkibG5KmHCPdChNdz/eUoXWC8J951YEuZIo+ZdnBuZkfu9yT91/+xYAFmVK1BS y942HtFIqlVORWwFaFfy0/8DPsNxcGXbXj8FX4eBrkFPsgP77WpKpnTWQrAjtATY6zY9 0oOxfhxS0/tt6mdLjUHvckiEO0a1I/VWsWzwR1fCYCpSDtHMueePOYwOBLlsLBAUXm4I O0KJ6mKrCE9+UJUR602Eye3CTJj2mWzUIGaK4GPWwuFMp+Gp67inXhx4WkyHhlxbF2Kc KYRw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1784765533; x=1785370333; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-gg:x-gm-message-state:from :to:cc:subject:date:message-id:reply-to:content-type; bh=UtrGfCC98mn5vA02LN8CzZjl6C4GThAo3sAWaEwlL/c=; b=P6TceCRjKiM9q0uN+NHq6SDoHrPVAz9e3F4oN/ZAKvxa1qdMH/WPs/kYxa59jMpDLd P3T4r1sfUf+UuaJ9icmMjkmVsPL16pnx1Cj5CVFMQFzCQrTfQc8tVsyiI90G4WPjDv1l vKD6luUBPw4WezHXsVEn9jur5+hIeS8EKMV1XW2UrHg2E7MWlAPquyylgnuRccqji9OW QA8D/o2JZp/OOgNvXYsmAK65Iz5fZC1KGoZK2orX7ILY5MNIIvVTtXyv6uGTF9rUFXe0 ZSQ3xLYPY4yIVQxqJ/novnv2WiCHtCB8ZHdsAZVkd+Gb6mBNIPzB/eBQu3AZy/6/Rf2o 8jJQ== X-Forwarded-Encrypted: i=1; AHgh+RpV8Lip2uk7NDaLUdS6FrLYjQnlsTa+Og4Xn752wtPPEqX9L62bPjru4AGW1eIu3XF392Gqww9R39Pf/R8=@vger.kernel.org X-Gm-Message-State: AOJu0Ywk0nE57CEKyvB5mCKQRVaTVMdKJWc5Cld2mtHaB8qCKcEuym8y bhJeNopMDEa9+vY0Qn/cKmb8DDf6GfItrnZLK910RY2JeCtytnr9oK5o X-Gm-Gg: AR+sD131avsN6QtBzZH9/cwwMmD3GB241p2Cp4GNX3/CM9oLCklkMiICn60zxen2c1O J9CrPqwP4+1vdHkqOjLJEX+ls820rVWMW7G7tpZ5CLv1Eb5fagAFYbOtHaOnjddLairWZrIzAF/ dUkpMysrIIg9vdJw109Lw7NmQUcVm6YFGkYCQs6RRQ0C1U3nRiGp80IM9uXymzkhPGUq/ASFQd2 wBJ2e1C0S43Y3ewGzW/Id0SOEnTRlLylJxT75UHM1pUdkIA0i4yAK/ds9hHKcLuVTNw3VaNGsqN OYpRUoVhr5CdH35TQqazbntjHzdgqTaM3vwYbV8n6MXsDRyMQyIthKWivGYN2wMKAzVzdgbGXsG Ye+0Az0lgsfIYBCJQruH/BHMFWAxMlmnRePu6YrGChZRkGCxFvyRqSfHAuUAzEP2QpmToZ7aAtE 8e/7Nr4ST4BuCPS3ojq62aUgIM42cI6WmsDfqk/xYBM202s+vF2JzkZZpNs3X29TccYgoaYa0aE G+ROCJQFXv1XRYOA4gynY9sf9lY85ERHTkXvLMj3jApqwVSavxbkWOak8MssxkP0Q== X-Received: by 2002:a05:6a00:ba02:b0:84a:2dcb:5ace with SMTP id d2e1a72fcca58-84e2bbe9067mr1043464b3a.62.1784765532727; Wed, 22 Jul 2026 17:12:12 -0700 (PDT) Received: from ryzen.lan ([2601:644:8000:7a86::e35]) by smtp.gmail.com with ESMTPSA id d2e1a72fcca58-84e1760025esm2037253b3a.57.2026.07.22.17.12.11 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 22 Jul 2026 17:12:12 -0700 (PDT) From: Rosen Penev To: linux-ide@vger.kernel.org Cc: Damien Le Moal , Niklas Cassel , Tejun Heo , Mans Rullgard , linux-kernel@vger.kernel.org (open list) Subject: [PATCH 2/3] ata: sata_dwc_460ex: fix data race on hsdev->sactive_issued in interrupt handler Date: Wed, 22 Jul 2026 17:12:07 -0700 Message-ID: <20260723001208.1469323-3-rosenp@gmail.com> X-Mailer: git-send-email 2.55.0 In-Reply-To: <20260723001208.1469323-1-rosenp@gmail.com> References: <20260723001208.1469323-1-rosenp@gmail.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit hsdev->sactive_issued is written locklessly in sata_dwc_isr() before acquiring host->lock, while sata_dwc_qc_complete() performs a read-modify-write on the same field under the lock. This creates a data race that can corrupt NCQ tag tracking state. Move the zero assignment inside the critical section so all accesses to sactive_issued are serialized by host->lock. Fixes: 2d20da00c324b ("ata: sata_dwc_460ex: get rid of global data") Assisted-by: opencode:big-pickle Signed-off-by: Rosen Penev --- drivers/ata/sata_dwc_460ex.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/ata/sata_dwc_460ex.c b/drivers/ata/sata_dwc_460ex.c index 8a1d80ac906a..73bacdfd0bd3 100644 --- a/drivers/ata/sata_dwc_460ex.c +++ b/drivers/ata/sata_dwc_460ex.c @@ -465,9 +465,9 @@ static irqreturn_t sata_dwc_isr(int irq, void *dev_instance) int handled, port = 0; uint intpr, sactive, sactive2, tag_mask; struct sata_dwc_device_port *hsdevp; - hsdev->sactive_issued = 0; spin_lock_irqsave(&host->lock, flags); + hsdev->sactive_issued = 0; /* Read the interrupt register */ intpr = sata_dwc_readl(&hsdev->sata_dwc_regs->intpr); -- 2.55.0