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[129.46.96.20]) by smtp.gmail.com with ESMTPSA id 5a478bee46e88-34141a49febsm32699771eec.2.2026.09.28.15.41.26 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 28 Sep 2026 15:41:26 -0700 (PDT) Date: Mon, 28 Sep 2026 15:41:24 -0700 From: Ashok Raj To: Lorenzo Pieralisi Cc: "Rafael J. Wysocki" , Mark Rutland , Marc Zyngier , Daniel Lezcano , Thomas Gleixner , Greg Kroah-Hartman , Danilo Krummrich , Hanjun Guo , Sudeep Holla , Wim Van Sebroeck , Guenter Roeck , Robin Murphy , Catalin Marinas , Will Deacon , Bartosz Golaszewski , Andy Shevchenko , linux-acpi@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, driver-core@lists.linux.dev, linux-watchdog@vger.kernel.org, Ashok Raj Subject: Re: [PATCH RFC 10/11] iommu/arm-smmu-v3: Add IRQ mapping -EPROBE_DEFER handling Message-ID: References: <20260925-acpi-static-table-irq-probe-defer-v1-0-2c62125d0085@kernel.org> <20260925-acpi-static-table-irq-probe-defer-v1-10-2c62125d0085@kernel.org> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: <20260925-acpi-static-table-irq-probe-defer-v1-10-2c62125d0085@kernel.org> X-Proofpoint-Spam-Info: AW1haW4tMjYwOTI4MDA5MCBTYWx0ZWRfX7E0AVqN4pFTd 0hpNlNHb0hmDMjPONPqOmHhffCts38NR/dqsy5poP9TSfaLP9ZkiEfPmiM1v13iPfm9JQcEa8N7 s+HlcOrKafsCUAP8W5lBylpR+kDurQE= X-Authority-Analysis: v=2.4 cv=ALbfqNVA c=1 sm=1 tr=0 ts=6abaed19 cx=c_pps a=cFYjgdjTJScbgFmBucgdfQ==:117 a=ouPCqIW2jiPt+lZRy3xVPw==:17 a=IkcTkHD0fZMA:10 a=VdqzKS8jKosA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=yOCtJkima9RkubShWh1s:22 a=VwQbUJbxAAAA:8 a=7CQSdrXTAAAA:8 a=EUspDBNiAAAA:8 a=ZUgflM6HN2uMUVLQTkcA:9 a=QEXdDO2ut3YA:10 a=scEy_gLbYbu1JhEsrz4S:22 a=a-qgeE7W1pNrGK8U0ZQC:22 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwOTI4MDA5MCBTYWx0ZWRfX2JHujUGcqNSp 2WzMCxtsblPEWhkVCuOXSfEYnE8dob4g2Aji4thTNLlHzWXsRTqM0YcGNFFx8QON2SFIgf932MP ftJ6/P4rrS/76BhZueTP/bv5KzpCEBRHj0YbVdEJfDjiU84vE4obMZRpuxuLyEu2eNthxETG6aM m6LPSwdVIHxl+bMlNpGUoiy7PZCdHOTKXLa7lbSwa4sLrBUweAFrjlUpfYu8iaqPIwOib5uUaFg jYT9B2yHSsr88KzfY+jT7ccz3JF2WrBW7nFUXfM1MYWytNUugASZPrckm3DMzifx9spjMBVAYrc ypzWpLaXwEqIlLSwz6XFCgNLY++vJDGKsSdkS6OzkIWuIUWFQKmRd0WdmZKeuaykeYX+T4UZRYO 9kzai0VcCmd7vO9n1vte+xiZv7GnZK20go6RAk22qoFCuRiR317yrAvEjwbizccPzWWmwn+KUB2 zz+gEYPq4R3y3MdeXFw== X-Proofpoint-GUID: HWR1Yxrf8_xB1xdSD-twaz85c0tbIKDu X-Proofpoint-ORIG-GUID: HWR1Yxrf8_xB1xdSD-twaz85c0tbIKDu X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1176,Hydra:6.1.134,FMLib:17.12.100.49 definitions=2026-09-28_06,2026-09-21_02,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 adultscore=0 priorityscore=1501 spamscore=0 clxscore=1015 suspectscore=0 impostorscore=0 phishscore=0 lowpriorityscore=0 malwarescore=0 bulkscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2609040000 definitions=main-2609280090 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.9.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260928_154131_643153_2BD8C436 X-CRM114-Status: GOOD ( 22.32 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Fri, Sep 25, 2026 at 09:48:09AM +0200, Lorenzo Pieralisi wrote: > With the advent of GICv5, IRQs mapping can fail if the interrupt > controller the wired SMMU interrupts are routed to has not probed > yet when the SMMU driver probes. > > Handle -EPROBE_DEFER gracefully for IRQ mappings failures. > > Signed-off-by: Lorenzo Pieralisi > Cc: Will Deacon > Cc: Robin Murphy > --- > drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c | 8 ++++++++ > 1 file changed, 8 insertions(+) > > diff --git a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c > index 5732f3ba0122..1832389916a4 100644 > --- a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c > +++ b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c > @@ -5562,18 +5562,26 @@ static int arm_smmu_device_probe(struct platform_device *pdev) > /* Interrupt lines */ > > irq = platform_get_irq_byname_optional(pdev, "combined"); > + if (irq == -EPROBE_DEFER) > + return dev_err_probe(dev, irq, "failed to get combined IRQ\n"); > if (irq > 0) > smmu->combined_irq = irq; > else { > irq = platform_get_irq_byname_optional(pdev, "eventq"); > + if (irq == -EPROBE_DEFER) > + return dev_err_probe(dev, irq, "failed to get eventq IRQ\n"); > if (irq > 0) > smmu->evtq.q.irq = irq; > > irq = platform_get_irq_byname_optional(pdev, "priq"); > + if (irq == -EPROBE_DEFER) > + return dev_err_probe(dev, irq, "failed to get priq IRQ\n"); > if (irq > 0) > smmu->priq.q.irq = irq; > > irq = platform_get_irq_byname_optional(pdev, "gerror"); > + if (irq == -EPROBE_DEFER) > + return dev_err_probe(dev, irq, "failed to get gerror IRQ\n"); > if (irq > 0) > smmu->gerr_irq = irq; > } minor: Maybe consolidate the multiple if (irq == -EPROBE_DEFER) parts and consolidate the return to one place? -- /ashok.raj ashok.raj@oss.qualcomm.com Qualcomm Inc