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 3E9793F527D; Sat, 28 Feb 2026 17:42:35 +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=1772300555; cv=none; b=rGVtNbz5GhSrDZ61i7F/XLaGPXU3fkQmHrDCdrxmijXpPHrFeIYPXrVimmdoQqoufIcuoeJ9dHLGAIF4oOv3+t/3C7P1qUzKjfCs5QroDcZe8Kpm/kd+u8dpL/BrWkPRngWwMrRXK2zuKzRa5odPlug7rFJ0jhqyR1PrSoyM3sM= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1772300555; c=relaxed/simple; bh=j7XjfcggW9wTKQ9kVivPmHRe+sslZnI9iWCZg1j7h3o=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=U9CU/j5x8B1mKi1IdpBo3gk405mgxHdfWxIv9WM1xO/7QngbzT+UdEMJnbmpmUCUGszhIkHnCR8A03i6h4glFHNWAzMlXTVIT6qGtmh1xiUgbGRMM3mAoIR0I62k+PDgf1LE+WYvBLwzY0bwgJOzgmTwHLx6bnJ16HfS0l0UPpQ= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=U7hEfR0E; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="U7hEfR0E" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 55A70C19423; Sat, 28 Feb 2026 17:42:34 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1772300555; bh=j7XjfcggW9wTKQ9kVivPmHRe+sslZnI9iWCZg1j7h3o=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=U7hEfR0EIocDsKhACI0IQjt9f1iimId25Y9XO7ew37mKVkvbHmXF+A09ti7m+xVwp 3Ye35Y7G8l9b7X5/83QT5/pKhL1mYsit7yPQcyrNa0xZLwm0D4rSMi0TEkCsaR7qON ijjJhhypx6WBcA0KuYj3Zf8n7g6bU4a4x8h4SNCM3bMjBpBZZcJUi/DhaZceDw8lIy 0ay1uDoj9RyVUHNFaBDfUWto4rTiqOk2I0+USVOxfgtz8NlcEeAR0B7la4PjcRiymL CGE5jVUYkeRzl+9/8VRFixfGPY1YM8fUoab9pFZBUw9syuVYPEIqKzQp4mH+uaFiQa IFSdyb7IMBQwQ== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Bingbu Cao , Stable@vger.kernel.org, Sakari Ailus , Hans Verkuil , Sasha Levin Subject: [PATCH 6.19 594/844] media: staging/ipu7: Ignore interrupts when device is suspended Date: Sat, 28 Feb 2026 12:28:27 -0500 Message-ID: <20260228173244.1509663-595-sashal@kernel.org> X-Mailer: git-send-email 2.51.0 In-Reply-To: <20260228173244.1509663-1-sashal@kernel.org> References: <20260228173244.1509663-1-sashal@kernel.org> Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit From: Bingbu Cao [ Upstream commit 9ad65684b9285c5d66fb417d50e91a25ef8c994d ] IPU7 devices have shared interrupts with others. In some case when IPU7 device is suspended, driver get unexpected interrupt and invalid irq status 0xffffffff from ISR_STATUS and PB LOCAL_STATUS registers as interrupt is triggered from other device on shared irq line. In order to avoid this issue use pm_runtime_get_if_active() to check if IPU7 device is resumed, ignore the invalid irq status and use synchronize_irq() in suspend. Cc: Stable@vger.kernel.org Fixes: b7fe4c0019b1 ("media: staging/ipu7: add Intel IPU7 PCI device driver") Signed-off-by: Bingbu Cao Signed-off-by: Sakari Ailus Signed-off-by: Hans Verkuil Signed-off-by: Sasha Levin --- drivers/staging/media/ipu7/ipu7-buttress.c | 17 ++++++++++++++++- drivers/staging/media/ipu7/ipu7.c | 4 ++++ 2 files changed, 20 insertions(+), 1 deletion(-) diff --git a/drivers/staging/media/ipu7/ipu7-buttress.c b/drivers/staging/media/ipu7/ipu7-buttress.c index e5707f5e300ba..40c6c8473357c 100644 --- a/drivers/staging/media/ipu7/ipu7-buttress.c +++ b/drivers/staging/media/ipu7/ipu7-buttress.c @@ -342,14 +342,23 @@ irqreturn_t ipu_buttress_isr(int irq, void *isp_ptr) u32 disable_irqs = 0; u32 irq_status; unsigned int i; + int active; - pm_runtime_get_noresume(dev); + active = pm_runtime_get_if_active(dev); + if (active <= 0) + return IRQ_NONE; pb_irq = readl(isp->pb_base + INTERRUPT_STATUS); writel(pb_irq, isp->pb_base + INTERRUPT_STATUS); /* check btrs ATS, CFI and IMR errors, BIT(0) is unused for IPU */ pb_local_irq = readl(isp->pb_base + BTRS_LOCAL_INTERRUPT_MASK); + if (pb_local_irq == 0xffffffff) { + dev_warn_once(dev, "invalid PB irq status\n"); + pm_runtime_put_noidle(dev); + return IRQ_NONE; + } + if (pb_local_irq & ~BIT(0)) { dev_warn(dev, "PB interrupt status 0x%x local 0x%x\n", pb_irq, pb_local_irq); @@ -370,6 +379,12 @@ irqreturn_t ipu_buttress_isr(int irq, void *isp_ptr) return IRQ_NONE; } + if (irq_status == 0xffffffff) { + dev_warn_once(dev, "invalid irq status 0x%08x\n", irq_status); + pm_runtime_put_noidle(dev); + return IRQ_NONE; + } + do { writel(irq_status, isp->base + BUTTRESS_REG_IRQ_CLEAR); diff --git a/drivers/staging/media/ipu7/ipu7.c b/drivers/staging/media/ipu7/ipu7.c index 5cddc09c72bf2..6c8c3eea44acb 100644 --- a/drivers/staging/media/ipu7/ipu7.c +++ b/drivers/staging/media/ipu7/ipu7.c @@ -2684,6 +2684,10 @@ static void ipu7_pci_reset_done(struct pci_dev *pdev) */ static int ipu7_suspend(struct device *dev) { + struct pci_dev *pdev = to_pci_dev(dev); + + synchronize_irq(pdev->irq); + return 0; } -- 2.51.0