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X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: 7yUXuWvSeVeEVn7thwlEGZ4Ht2w4aaOlnrLWhHLL9fZHetqeNPCr9Yjf5xwwWbSYap7f5FmV39IwtQathAU8onht3e0CFSCFDCdBbmez9E5MUrryg08Pb6m6m4X0ccdKsLooBLzcmp4gQIRnY/fBmDt8deamlHurIDeUQ9b2L6cTVRHUOKtCOz6Mgbg8VqCd+w170xYG8+TKNVgm4Hkvj3GXbTrq+AOYcS+3W/Mb29y4rGhK7Lb6UC7kb7DW4FlhpHdG6Czq/ofYfirZ0BsuvAFoTcv9p0Oe+3M2wYFkVb+q+yDzYj1GwzaMQ7+1fudecwz3m1tgV2XD2jCJG3KJb2k+5R4WEVvTrxUPA04vi489t3vEadno1iOjgJdme9irRQRCeezBrBTTN1eixpsUMtg07CTsYIt9zbUDb9w09UFUGYHQ5SMcu6OXreF/A7d7 X-OriginatorOrg: arm.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 06 May 2026 09:38:51.6800 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 9f6e558e-c56e-4717-b2e4-08deab53485a X-MS-Exchange-CrossTenant-Id: f34e5979-57d9-4aaa-ad4d-b122a662184d X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=f34e5979-57d9-4aaa-ad4d-b122a662184d;Ip=[4.158.2.129];Helo=[outbound-uk1.az.dlp.m.darktrace.com] X-MS-Exchange-CrossTenant-AuthSource: AMS0EPF00000194.eurprd05.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: GVXPR08MB11421 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.9.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260506_023904_359809_04A7CCC0 X-CRM114-Status: GOOD ( 14.79 ) 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 The ITS MSI domain no longer manages LPI allocation directly. LPIs are allocated and freed by the parent LPI domain, which can now handle a full range of interrupts and unwind partial allocations internally. Make the ITS domain request and release the parent IRQs as a single range instead of iterating over each interrupt. The ITS allocation path then only needs to reserve EventIDs, allocate the parent range, and fill in the ITS irq_data for each MSI. Since no operation in the per-MSI loop can fail, the partial parent-free unwind becomes unnecessary. On teardown, reset the ITS irq_data for the range and then release the parent range in one call, leaving LPI teardown to the LPI domain. Signed-off-by: Sascha Bischoff Reviewed-by: Marc Zyngier Reviewed-by: Lorenzo Pieralisi --- drivers/irqchip/irq-gic-v5-its.c | 22 +++++++--------------- 1 file changed, 7 insertions(+), 15 deletions(-) diff --git a/drivers/irqchip/irq-gic-v5-its.c b/drivers/irqchip/irq-gic-v5-= its.c index 36d03f82ef684..28e39b065de0e 100644 --- a/drivers/irqchip/irq-gic-v5-its.c +++ b/drivers/irqchip/irq-gic-v5-its.c @@ -937,6 +937,7 @@ static int gicv5_its_irq_domain_alloc(struct irq_domain= *domain, unsigned int vi int ret, i; =20 its_dev =3D info->scratchpad[0].ptr; + device_id =3D its_dev->device_id; =20 ret =3D gicv5_its_alloc_eventid(its_dev, info, nr_irqs, &event_id_base); if (ret) @@ -946,14 +947,11 @@ static int gicv5_its_irq_domain_alloc(struct irq_doma= in *domain, unsigned int vi if (ret) goto out_eventid; =20 - device_id =3D its_dev->device_id; + ret =3D irq_domain_alloc_irqs_parent(domain, virq, nr_irqs, NULL); + if (ret) + goto out_eventid; =20 for (i =3D 0; i < nr_irqs; i++) { - ret =3D irq_domain_alloc_irqs_parent(domain, virq + i, 1, NULL); - if (ret) { - goto out_free_irqs; - } - /* * Store eventid and deviceid into the hwirq for later use. * @@ -972,12 +970,6 @@ static int gicv5_its_irq_domain_alloc(struct irq_domai= n *domain, unsigned int vi =20 return 0; =20 -out_free_irqs: - while (--i >=3D 0) { - irqd =3D irq_domain_get_irq_data(domain, virq + i); - irq_domain_reset_irq_data(irqd); - irq_domain_free_irqs_parent(domain, virq + i, 1); - } out_eventid: gicv5_its_free_eventid(its_dev, event_id_base, nr_irqs); return ret; @@ -1000,14 +992,14 @@ static void gicv5_its_irq_domain_free(struct irq_dom= ain *domain, unsigned int vi bitmap_release_region(its_dev->event_map, event_id_base, get_count_order(nr_irqs)); =20 - /* Hierarchically free irq data */ for (i =3D 0; i < nr_irqs; i++) { d =3D irq_domain_get_irq_data(domain, virq + i); - irq_domain_reset_irq_data(d); - irq_domain_free_irqs_parent(domain, virq + i, 1); } =20 + /* Hierarchically free irq data */ + irq_domain_free_irqs_parent(domain, virq, nr_irqs); + gicv5_its_syncr(its, its_dev); gicv5_irs_syncr(); } --=20 2.34.1