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Bottomley" , "Martin K. Petersen" , Madhavan Srinivasan , Michael Ellerman , Nicholas Piggin , "Christophe Leroy (CS GROUP)" Cc: linux-kernel@vger.kernel.org, linux-scsi@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, Brian King , Greg Joyce , Kyle Mahlkuch References: <20260909-ibmvfc-fpin-support-v8-0-b27183b055af@linux.ibm.com> <20260909-ibmvfc-fpin-support-v8-5-b27183b055af@linux.ibm.com> Content-Language: en-US From: Tyrel Datwyler In-Reply-To: <20260909-ibmvfc-fpin-support-v8-5-b27183b055af@linux.ibm.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-TM-AS-GCONF: 00 X-Proofpoint-Reinject: loops=2 maxloops=12 X-Authority-Analysis: v=2.4 cv=SpUFe/O0 c=1 sm=1 tr=0 ts=6aa33af7 cx=c_pps a=aDMHemPKRhS1OARIsFnwRA==:117 a=aDMHemPKRhS1OARIsFnwRA==:17 a=IkcTkHD0fZMA:10 a=VdqzKS8jKosA:10 a=VkNPw1HP01LnGYTKEx00:22 a=RnoormkPH1_aCDwRdu11:22 a=iQ6ETzBq9ecOQQE5vZCe:22 a=VnNF1IyMAAAA:8 a=eExql_viPIbS7pE7dewA:9 a=QEXdDO2ut3YA:10 X-Proofpoint-ORIG-GUID: YRtb2prPVUSsa55k78RVvojR9Yq4kKqs X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwOTEwMDI5MCBTYWx0ZWRfX4w9tc7J07Rie q8DVr2XJFKqBEMloyPJ8LqmC+QwmuyWQuxFEJ07YC9xznps8VyrHtrOsSuBqsdKT3rBic9sFGqL Q4jJiHavLqOBQzmGbnIDmxkCBW596uFWOFgXoqVs2yfRpY036G50lck/bRbw0cLzIJ0jKE56whE tHgWCLyJC7vgCzVA6bjMx+IDw7ccV0Wq4hAVl/IhfrPfL3g6cGvSUwGMfnM9UIj1+zf1hhXfdMQ H2Idk1Lj7xnh/a6Czfq9vtamgAXJq91aqqinB2Iy51NQDcZdZvEMWDzwJI8HfQev5v6t4P30up/ 9Bdz27vMkfgWMYrWrkk51YCI2qCV20CGlHXFBhrOZSRP/LGFMA6cSt0hPj5vjd+THTHshI7UwZT ueXtzIkm0wW3HR88GZ1rucoqWPWJ1d0oz0rXWWO56zsSLNvL6pmM3MwF2+lX12cRHrbiSgk2OZH Ebhj1TMON2nzvNVFtsA== X-Proofpoint-Spam-Info: AW1haW4tMjYwOTEwMDI5MCBTYWx0ZWRfX3ucwHxEA6Ihd cQbWUuECt13yulkKv0dgb/us0YpVnqPJqCDKjhLHXuvgXvDbxy2aUl4r1g70P6JYlpFZATPRooL H91LA0m1/lZSgw7Cb1Ptf++Deh/4mCk= X-Proofpoint-GUID: XCB2tZ2i_fu57V9gTWsqnRJbC1EXPwmv 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=2026-09-10_07,2026-09-09_02,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 adultscore=0 lowpriorityscore=0 suspectscore=0 spamscore=0 clxscore=1015 phishscore=0 malwarescore=0 impostorscore=0 bulkscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2609040000 definitions=main-2609100290 On 9/9/26 12:08 PM, Dave Marquardt via B4 Relay wrote: > From: Dave Marquardt > > Add ibmvfc_interrupt_async_subq(), an IRQ handler dedicated to > asynchronous sub-CRQ events from the adapter. The handler disables > the sub-CRQ IRQ and then calls ibmvfc_drain_async_subq() to consume > all pending entries before re-enabling interrupts. The handler is > marked as __maybe_unused until a later patch when it is used. > > ibmvfc_drain_async_subq() holds the per-queue q_lock while > processing. It loops over available CRQ entries via ibmvfc_next_scrq(), > wrapping each in a typed struct ibmvfc_async_crq_event and dispatching > it to ibmvfc_handle_async(), then clears the valid bit and issues a > write barrier. After draining, it re-enables the sub-CRQ IRQ and performs > one final check for a newly arrived entry to close the IRQ-enable race; > if one is found it is processed before exiting the loop. > > Signed-off-by: Dave Marquardt > --- Acked-by: Tyrel Datwyler