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Wed, 12 Nov 2025 15:40:44 +0000 (GMT) From: Tobias Schumacher Date: Wed, 12 Nov 2025 16:40:44 +0100 Subject: [PATCH 1/2] genirq: Change hwirq parameter to irq_hw_number_t Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-Id: <20251112-implement-msi-domain-v1-1-103dd123de14@linux.ibm.com> References: <20251112-implement-msi-domain-v1-0-103dd123de14@linux.ibm.com> In-Reply-To: <20251112-implement-msi-domain-v1-0-103dd123de14@linux.ibm.com> To: Heiko Carstens , Vasily Gorbik , Alexander Gordeev , Christian Borntraeger , Sven Schnelle , Niklas Schnelle , Gerald Schaefer , Gerd Bayer , Halil Pasic , Matthew Rosato , Thomas Gleixner Cc: linux-kernel@vger.kernel.org, linux-s390@vger.kernel.org, Tobias Schumacher X-Mailer: b4 0.14.2 X-TM-AS-GCONF: 00 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjUxMTA4MDAyMiBTYWx0ZWRfXyHIMdCWvSq6F wYYNweChsITjyZR2aXjUlnDVryqIYMQJQ//ouTXp15hWVDiWRusufX+beFPtPzmWwZ1OG7b685b +vlu2AL3tmYtXRrXJKmAHWW6ZUGP/HHrdxQCL6NeFWZLotEa3wMXckN+63wnzVQupkb79z/hLjc yXE1bgBIVjs3l49GAgCnFugPTI7pYVRYjPzkbdzef85CVOjOdm7+k/YlvBgO7IIUD7AXsDyTqcO DDOL1jrXZqEbAe3iaGkW+/54l0rjEP7aitsxo5Eku6r7TxsGRe6SwOxfBKCUUDP7u83sToh/gm3 AmMILDkagB+gME+rUg7t0xeB1leuxkIczaPSw9NEqCmlv6sMICAhxzUOVng/WNeoVl4Mu82+seL zgA57IagvHsLW8UW+W/sWUJOYwDg9g== X-Authority-Analysis: v=2.4 cv=ZK3aWH7b c=1 sm=1 tr=0 ts=6914aa81 cx=c_pps a=aDMHemPKRhS1OARIsFnwRA==:117 a=aDMHemPKRhS1OARIsFnwRA==:17 a=IkcTkHD0fZMA:10 a=6UeiqGixMTsA:10 a=VkNPw1HP01LnGYTKEx00:22 a=VnNF1IyMAAAA:8 a=ksSNG-jg9v29UnNErXoA:9 a=QEXdDO2ut3YA:10 X-Proofpoint-ORIG-GUID: dd0i4D_0VNAskw4ManR5GHeElUGjHHvf X-Proofpoint-GUID: dd0i4D_0VNAskw4ManR5GHeElUGjHHvf X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1121,Hydra:6.1.9,FMLib:17.12.100.49 definitions=2025-11-12_04,2025-11-11_03,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 malwarescore=0 lowpriorityscore=0 priorityscore=1501 suspectscore=0 phishscore=0 impostorscore=0 spamscore=0 bulkscore=0 adultscore=0 clxscore=1015 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.19.0-2510240000 definitions=main-2511080022 The irqdomain implementation internally represents hardware IRQs as irq_hw_number_t, which is defined as unsigned long int. When providing an irq_hw_number_t to the generic_handle_domain() functions that expect and unsigned int hwirq, this can lead to a loss of information. Change the hwirq parameter to irq_hw_number_t to support the full range of hwirqs. Signed-off-by: Tobias Schumacher Reviewed-by: Thomas Gleixner --- include/linux/irqdesc.h | 6 +++--- kernel/irq/irqdesc.c | 6 +++--- 2 files changed, 6 insertions(+), 6 deletions(-) diff --git a/include/linux/irqdesc.h b/include/linux/irqdesc.h index fd091c35d5721eee37a2fd3d5526559671d5048d..03b63aea73bb21ae1456910afa5= 34d60f9cfa94d 100644 --- a/include/linux/irqdesc.h +++ b/include/linux/irqdesc.h @@ -183,9 +183,9 @@ int generic_handle_irq_safe(unsigned int irq); * and handle the result interrupt number. Return -EINVAL if * conversion failed. */ -int generic_handle_domain_irq(struct irq_domain *domain, unsigned int hwir= q); -int generic_handle_domain_irq_safe(struct irq_domain *domain, unsigned int= hwirq); -int generic_handle_domain_nmi(struct irq_domain *domain, unsigned int hwir= q); +int generic_handle_domain_irq(struct irq_domain *domain, irq_hw_number_t h= wirq); +int generic_handle_domain_irq_safe(struct irq_domain *domain, irq_hw_numbe= r_t hwirq); +int generic_handle_domain_nmi(struct irq_domain *domain, irq_hw_number_t h= wirq); #endif =20 /* Test to see if a driver has successfully requested an irq */ diff --git a/kernel/irq/irqdesc.c b/kernel/irq/irqdesc.c index db714d3014b5f7b62403ea04b80331ec6b1dc642..0cd3198496bc0766c81c353c3ff= 80ea184793d6a 100644 --- a/kernel/irq/irqdesc.c +++ b/kernel/irq/irqdesc.c @@ -720,7 +720,7 @@ EXPORT_SYMBOL_GPL(generic_handle_irq_safe); * This function must be called from an IRQ context with irq regs * initialized. */ -int generic_handle_domain_irq(struct irq_domain *domain, unsigned int hwir= q) +int generic_handle_domain_irq(struct irq_domain *domain, irq_hw_number_t h= wirq) { return handle_irq_desc(irq_resolve_mapping(domain, hwirq)); } @@ -738,7 +738,7 @@ EXPORT_SYMBOL_GPL(generic_handle_domain_irq); * context). If the interrupt is marked as 'enforce IRQ-context only' then * the function must be invoked from hard interrupt context. */ -int generic_handle_domain_irq_safe(struct irq_domain *domain, unsigned int= hwirq) +int generic_handle_domain_irq_safe(struct irq_domain *domain, irq_hw_numbe= r_t hwirq) { unsigned long flags; int ret; @@ -761,7 +761,7 @@ EXPORT_SYMBOL_GPL(generic_handle_domain_irq_safe); * This function must be called from an NMI context with irq regs * initialized. **/ -int generic_handle_domain_nmi(struct irq_domain *domain, unsigned int hwir= q) +int generic_handle_domain_nmi(struct irq_domain *domain, irq_hw_number_t h= wirq) { WARN_ON_ONCE(!in_nmi()); return handle_irq_desc(irq_resolve_mapping(domain, hwirq)); --=20 2.48.1