On Fri, Dec 10, 2021 at 11:19:26PM +0100, Thomas Gleixner wrote: > From: Thomas Gleixner <tglx@xxxxxxxxxxxxx> > > Replace open coded MSI descriptor chasing and use the proper accessor > functions instead. > > Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx> > Reviewed-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> > Reviewed-by: Jason Gunthorpe <jgg@xxxxxxxxxx> This patch results in the following runtime warning when booting x86 (32 bit) nosmp images from NVME in qemu. [ 14.825482] nvme nvme0: 1/0/0 default/read/poll queues ILLOPC: ca7c6d10: 0f 0b [ 14.826188] ------------[ cut here ]------------ [ 14.826307] WARNING: CPU: 0 PID: 7 at drivers/pci/msi/msi.c:1114 pci_irq_get_affinity+0x80/0x90 [ 14.826455] Modules linked in: [ 14.826640] CPU: 0 PID: 7 Comm: kworker/u2:0 Not tainted 5.17.0-rc1-00419-g1d2d8baaf053 #1 [ 14.826797] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.15.0-0-g2dd4b9b3f840-prebuilt.qemu.org 04/01/2014 [ 14.827132] Workqueue: nvme-reset-wq nvme_reset_work [ 14.827336] EIP: pci_irq_get_affinity+0x80/0x90 [ 14.827452] Code: e8 d5 30 af ff 85 c0 75 bd 90 0f 0b 31 c0 5b 5e 5d c3 8d b4 26 00 00 00 00 90 5b b8 24 32 7e cb 5e 5d c3 8d b4 26 00 00 00 00 <0f> 0b eb e0 8d b4 26 00 00 00 00 8d 74 26 00 90 55 89 e5 57 56 53 [ 14.827717] EAX: 00000000 EBX: c18ba000 ECX: 00000000 EDX: c297c210 [ 14.827816] ESI: 00000001 EDI: c18ba000 EBP: c1247e24 ESP: c1247e1c [ 14.827924] DS: 007b ES: 007b FS: 0000 GS: 0000 SS: 0068 EFLAGS: 00000246 [ 14.828110] CR0: 80050033 CR2: ffda9000 CR3: 0b8ad000 CR4: 000006d0 [ 14.828268] Call Trace: [ 14.828554] blk_mq_pci_map_queues+0x26/0x70 [ 14.828710] nvme_pci_map_queues+0x75/0xc0 [ 14.828808] blk_mq_update_queue_map+0x86/0xa0 [ 14.828891] blk_mq_alloc_tag_set+0xf3/0x390 [ 14.828965] ? nvme_wait_freeze+0x3d/0x50 [ 14.829137] nvme_reset_work+0xd02/0x1120 [ 14.829269] ? lock_acquire+0xc3/0x290 [ 14.829435] process_one_work+0x1ed/0x490 [ 14.829569] worker_thread+0x15e/0x3c0 [ 14.829665] kthread+0xd3/0x100 [ 14.829729] ? process_one_work+0x490/0x490 [ 14.829799] ? kthread_complete_and_exit+0x20/0x20 [ 14.829890] ret_from_fork+0x1c/0x28 Bisect results below. #regzbot introduced: f48235900182d6 Guenter --- # bad: [e783362eb54cd99b2cac8b3a9aeac942e6f6ac07] Linux 5.17-rc1 # good: [df0cc57e057f18e44dac8e6c18aba47ab53202f9] Linux 5.16 git bisect start 'v5.17-rc1' 'v5.16' # good: [fef8dfaea9d6c444b6c2174b3a2b0fca4d226c5e] Merge tag 'regulator-v5.17' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regulator git bisect good fef8dfaea9d6c444b6c2174b3a2b0fca4d226c5e # bad: [3ceff4ea07410763d5d4cccd60349bf7691e7e61] Merge tag 'sound-5.17-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound git bisect bad 3ceff4ea07410763d5d4cccd60349bf7691e7e61 # good: [57ea81971b7296b42fc77424af44c5915d3d4ae2] Merge tag 'usb-5.17-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb git bisect good 57ea81971b7296b42fc77424af44c5915d3d4ae2 # bad: [feb7a43de5ef625ad74097d8fd3481d5dbc06a59] Merge tag 'irq-msi-2022-01-13' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip git bisect bad feb7a43de5ef625ad74097d8fd3481d5dbc06a59 # good: [ce990f1de0bc6ff3de43d385e0985efa980fba24] Merge tag 'for-linus-5.17-rc1-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip git bisect good ce990f1de0bc6ff3de43d385e0985efa980fba24 # good: [4afd2a9355a9deb16ea42b896820dacf49843a8f] Merge branches 'clk-ingenic' and 'clk-mediatek' into clk-next git bisect good 4afd2a9355a9deb16ea42b896820dacf49843a8f # good: [455e73a07f6e288b0061dfcf4fcf54fa9fe06458] Merge tag 'clk-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/clk/linux git bisect good 455e73a07f6e288b0061dfcf4fcf54fa9fe06458 # bad: [f2948df5f87a722591499da60ab91c611422f755] x86/pci/xen: Use msi_for_each_desc() git bisect bad f2948df5f87a722591499da60ab91c611422f755 # good: [93296cd1325d1d9afede60202d8833011c9001f2] PCI/MSI: Allocate MSI device data on first use git bisect good 93296cd1325d1d9afede60202d8833011c9001f2 # good: [82ff8e6b78fc4587a4255301f0a283506daf11b6] PCI/MSI: Use msi_get_virq() in pci_get_vector() git bisect good 82ff8e6b78fc4587a4255301f0a283506daf11b6 # bad: [125282cd4f33ecd53a24ae4807409da0e5e90fd4] genirq/msi: Move descriptor list to struct msi_device_data git bisect bad 125282cd4f33ecd53a24ae4807409da0e5e90fd4 # bad: [065afdc9c521f05c53f226dabe5dda2d30294d65] iommu/arm-smmu-v3: Use msi_get_virq() git bisect bad 065afdc9c521f05c53f226dabe5dda2d30294d65 # bad: [f6632bb2c1454b857adcd131320379ec16fd8666] dmaengine: mv_xor_v2: Get rid of msi_desc abuse git bisect bad f6632bb2c1454b857adcd131320379ec16fd8666 # bad: [f48235900182d64537c6e8f8dc0932b57a1a0638] PCI/MSI: Simplify pci_irq_get_affinity() git bisect bad f48235900182d64537c6e8f8dc0932b57a1a0638 # first bad commit: [f48235900182d64537c6e8f8dc0932b57a1a0638] PCI/MSI: Simplify pci_irq_get_affinity()
