* Re: WARNING in dma_map_page_attrs [not found] ` <000000000000a0f8a305b261fe4a@google.com> @ 2020-10-24 18:15 ` Jakub Kicinski 2020-10-26 5:23 ` Parav Pandit 0 siblings, 1 reply; 6+ messages in thread From: Jakub Kicinski @ 2020-10-24 18:15 UTC (permalink / raw) To: syzbot Cc: christian.koenig, dri-devel, hch, iommu, linaro-mm-sig-owner, linaro-mm-sig, linux-kernel, linux-media, m.szyprowski, netdev, robin.murphy, sumit.semwal, syzkaller-bugs, linux-rdma CC: rdma, looks like rdma from the stack trace On Fri, 23 Oct 2020 20:07:17 -0700 syzbot wrote: > syzbot has found a reproducer for the following issue on: > > HEAD commit: 3cb12d27 Merge tag 'net-5.10-rc1' of git://git.kernel.org/.. > git tree: net > console output: https://syzkaller.appspot.com/x/log.txt?x=13125390500000 > kernel config: https://syzkaller.appspot.com/x/.config?x=46c6fea3eb827ae1 > dashboard link: https://syzkaller.appspot.com/bug?extid=34dc2fea3478e659af01 > compiler: gcc (GCC) 10.1.0-syz 20200507 > syz repro: https://syzkaller.appspot.com/x/repro.syz?x=16858664500000 > C reproducer: https://syzkaller.appspot.com/x/repro.c?x=11f402ef900000 > > IMPORTANT: if you fix the issue, please add the following tag to the commit: > Reported-by: syzbot+34dc2fea3478e659af01@syzkaller.appspotmail.com > > netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 > netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 > netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 > infiniband syz2: set active > infiniband syz2: added macvlan0 > ------------[ cut here ]------------ > WARNING: CPU: 1 PID: 8488 at kernel/dma/mapping.c:149 dma_map_page_attrs+0x493/0x700 kernel/dma/mapping.c:149 > Modules linked in: > CPU: 1 PID: 8488 Comm: syz-executor144 Not tainted 5.9.0-syzkaller #0 > Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 > RIP: 0010:dma_map_page_attrs+0x493/0x700 kernel/dma/mapping.c:149 > Code: 80 3c 10 00 0f 85 ed 01 00 00 48 8b 1d 86 38 e9 0c e9 2d fc ff ff 48 89 c3 e9 d1 fd ff ff e8 04 11 12 00 0f 0b e8 fd 10 12 00 <0f> 0b 49 c7 c4 ff ff ff ff e9 d5 fd ff ff e8 ea 10 12 00 48 8d 7b > RSP: 0018:ffffc90000fdec68 EFLAGS: 00010293 > RAX: 0000000000000000 RBX: ffffffff894d1060 RCX: ffffffff815df1e3 > RDX: ffff8880208c1a40 RSI: ffffffff815df5b3 RDI: ffff8880196f8b00 > RBP: ffff88801412d800 R08: 0000000000000002 R09: 0000000000000000 > R10: 0000000000000002 R11: 0000000000000000 R12: ffffea0000504b40 > R13: ffff8880196f86e8 R14: 00000000000008b8 R15: 0000000000000002 > FS: 0000000001b26880(0000) GS:ffff8880b9f00000(0000) knlGS:0000000000000000 > CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > CR2: 00000000200002c0 CR3: 0000000022446000 CR4: 00000000001506e0 > DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 > DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 > Call Trace: > dma_map_single_attrs include/linux/dma-mapping.h:279 [inline] > ib_dma_map_single include/rdma/ib_verbs.h:3967 [inline] > ib_mad_post_receive_mads+0x23f/0xd60 drivers/infiniband/core/mad.c:2715 > ib_mad_port_start drivers/infiniband/core/mad.c:2862 [inline] > ib_mad_port_open drivers/infiniband/core/mad.c:3016 [inline] > ib_mad_init_device+0x72b/0x1400 drivers/infiniband/core/mad.c:3092 > add_client_context+0x405/0x5e0 drivers/infiniband/core/device.c:680 > enable_device_and_get+0x1d5/0x3c0 drivers/infiniband/core/device.c:1301 > ib_register_device drivers/infiniband/core/device.c:1376 [inline] > ib_register_device+0x7a7/0xa40 drivers/infiniband/core/device.c:1335 > rxe_register_device+0x46d/0x570 drivers/infiniband/sw/rxe/rxe_verbs.c:1182 > rxe_add+0x12fe/0x16d0 drivers/infiniband/sw/rxe/rxe.c:247 > rxe_net_add+0x8c/0xe0 drivers/infiniband/sw/rxe/rxe_net.c:507 > rxe_newlink drivers/infiniband/sw/rxe/rxe.c:269 [inline] > rxe_newlink+0xb7/0xe0 drivers/infiniband/sw/rxe/rxe.c:250 > nldev_newlink+0x30e/0x540 drivers/infiniband/core/nldev.c:1555 > rdma_nl_rcv_msg+0x367/0x690 drivers/infiniband/core/netlink.c:195 > rdma_nl_rcv_skb drivers/infiniband/core/netlink.c:239 [inline] > rdma_nl_rcv+0x2f2/0x440 drivers/infiniband/core/netlink.c:259 > netlink_unicast_kernel net/netlink/af_netlink.c:1304 [inline] > netlink_unicast+0x533/0x7d0 net/netlink/af_netlink.c:1330 > netlink_sendmsg+0x856/0xd90 net/netlink/af_netlink.c:1919 > sock_sendmsg_nosec net/socket.c:651 [inline] > sock_sendmsg+0xcf/0x120 net/socket.c:671 > ____sys_sendmsg+0x6e8/0x810 net/socket.c:2353 > ___sys_sendmsg+0xf3/0x170 net/socket.c:2407 > __sys_sendmsg+0xe5/0x1b0 net/socket.c:2440 > do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 > entry_SYSCALL_64_after_hwframe+0x44/0xa9 > RIP: 0033:0x443699 > Code: 18 89 d0 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 db 0d fc ff c3 66 2e 0f 1f 84 00 00 00 00 > RSP: 002b:00007ffc067db418 EFLAGS: 00000246 ORIG_RAX: 000000000000002e > RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000443699 > RDX: 0000000000000000 RSI: 00000000200002c0 RDI: 0000000000000003 > RBP: 00007ffc067db420 R08: 0000000001bbbbbb R09: 0000000001bbbbbb > R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffc067db430 > R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 > ^ permalink raw reply [flat|nested] 6+ messages in thread
* RE: WARNING in dma_map_page_attrs 2020-10-24 18:15 ` WARNING in dma_map_page_attrs Jakub Kicinski @ 2020-10-26 5:23 ` Parav Pandit 2020-10-27 8:11 ` hch 0 siblings, 1 reply; 6+ messages in thread From: Parav Pandit @ 2020-10-26 5:23 UTC (permalink / raw) To: Jakub Kicinski, syzbot Cc: christian.koenig, dri-devel, hch, iommu, linaro-mm-sig-owner, linaro-mm-sig, linux-kernel, linux-media, m.szyprowski, netdev, robin.murphy, sumit.semwal, syzkaller-bugs, linux-rdma Hi Christoph, > From: Jakub Kicinski <kuba@kernel.org> > Sent: Saturday, October 24, 2020 11:45 PM > > CC: rdma, looks like rdma from the stack trace > > On Fri, 23 Oct 2020 20:07:17 -0700 syzbot wrote: > > syzbot has found a reproducer for the following issue on: > > > > HEAD commit: 3cb12d27 Merge tag 'net-5.10-rc1' of git://git.kernel.org/.. In [1] you mentioned that dma_mask should not be set for dma_virt_ops. So patch [2] removed it. But check to validate the dma mask for all dma_ops was added in [3]. What is the right way? Did I misunderstood your comment about dma_mask in [1]? [1] https://www.spinics.net/lists/linux-rdma/msg96374.html [2] e0477b34d9d ("RDMA: Explicitly pass in the dma_device to ib_register_device") [3] f959dcd6ddfd ("dma-direct: Fix potential NULL pointer dereference") > > WARNING: CPU: 1 PID: 8488 at kernel/dma/mapping.c:149 > > dma_map_page_attrs+0x493/0x700 kernel/dma/mapping.c:149 Modules > linked in: > > dma_map_single_attrs include/linux/dma-mapping.h:279 [inline] > > ib_dma_map_single include/rdma/ib_verbs.h:3967 [inline] > > ib_mad_post_receive_mads+0x23f/0xd60 > > drivers/infiniband/core/mad.c:2715 > > ib_mad_port_start drivers/infiniband/core/mad.c:2862 [inline] > > ib_mad_port_open drivers/infiniband/core/mad.c:3016 [inline] > > ib_mad_init_device+0x72b/0x1400 drivers/infiniband/core/mad.c:3092 > > add_client_context+0x405/0x5e0 drivers/infiniband/core/device.c:680 > > enable_device_and_get+0x1d5/0x3c0 > > drivers/infiniband/core/device.c:1301 > > ib_register_device drivers/infiniband/core/device.c:1376 [inline] > > ib_register_device+0x7a7/0xa40 drivers/infiniband/core/device.c:1335 > > rxe_register_device+0x46d/0x570 > > drivers/infiniband/sw/rxe/rxe_verbs.c:1182 > > rxe_add+0x12fe/0x16d0 drivers/infiniband/sw/rxe/rxe.c:247 > > rxe_net_add+0x8c/0xe0 drivers/infiniband/sw/rxe/rxe_net.c:507 > > rxe_newlink drivers/infiniband/sw/rxe/rxe.c:269 [inline] > > rxe_newlink+0xb7/0xe0 drivers/infiniband/sw/rxe/rxe.c:250 > > nldev_newlink+0x30e/0x540 drivers/infiniband/core/nldev.c:1555 > > rdma_nl_rcv_msg+0x367/0x690 drivers/infiniband/core/netlink.c:195 > > rdma_nl_rcv_skb drivers/infiniband/core/netlink.c:239 [inline] > > rdma_nl_rcv+0x2f2/0x440 drivers/infiniband/core/netlink.c:259 > > netlink_unicast_kernel net/netlink/af_netlink.c:1304 [inline] > > netlink_unicast+0x533/0x7d0 net/netlink/af_netlink.c:1330 > > netlink_sendmsg+0x856/0xd90 net/netlink/af_netlink.c:1919 > > sock_sendmsg_nosec net/socket.c:651 [inline] > > sock_sendmsg+0xcf/0x120 net/socket.c:671 > > ____sys_sendmsg+0x6e8/0x810 net/socket.c:2353 > > ___sys_sendmsg+0xf3/0x170 net/socket.c:2407 > > __sys_sendmsg+0xe5/0x1b0 net/socket.c:2440 > > do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 > > entry_SYSCALL_64_after_hwframe+0x44/0xa9 > > RIP: 0033:0x443699 > > Code: 18 89 d0 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 48 89 f8 48 > > 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d > > 01 f0 ff ff 0f 83 db 0d fc ff c3 66 2e 0f 1f 84 00 00 00 00 > > RSP: 002b:00007ffc067db418 EFLAGS: 00000246 ORIG_RAX: > 000000000000002e > > RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000443699 > > RDX: 0000000000000000 RSI: 00000000200002c0 RDI: 0000000000000003 > > RBP: 00007ffc067db420 R08: 0000000001bbbbbb R09: 0000000001bbbbbb > > R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffc067db430 > > R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 > > ^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: WARNING in dma_map_page_attrs 2020-10-26 5:23 ` Parav Pandit @ 2020-10-27 8:11 ` hch 2020-10-27 12:52 ` Parav Pandit 0 siblings, 1 reply; 6+ messages in thread From: hch @ 2020-10-27 8:11 UTC (permalink / raw) To: Parav Pandit Cc: Jakub Kicinski, syzbot, christian.koenig, dri-devel, hch, iommu, linaro-mm-sig-owner, linaro-mm-sig, linux-kernel, linux-media, m.szyprowski, netdev, robin.murphy, sumit.semwal, syzkaller-bugs, linux-rdma On Mon, Oct 26, 2020 at 05:23:48AM +0000, Parav Pandit wrote: > Hi Christoph, > > > From: Jakub Kicinski <kuba@kernel.org> > > Sent: Saturday, October 24, 2020 11:45 PM > > > > CC: rdma, looks like rdma from the stack trace > > > > On Fri, 23 Oct 2020 20:07:17 -0700 syzbot wrote: > > > syzbot has found a reproducer for the following issue on: > > > > > > HEAD commit: 3cb12d27 Merge tag 'net-5.10-rc1' of git://git.kernel.org/.. > > In [1] you mentioned that dma_mask should not be set for dma_virt_ops. > So patch [2] removed it. > > But check to validate the dma mask for all dma_ops was added in [3]. > > What is the right way? Did I misunderstood your comment about dma_mask in [1]? No, I did not say we don't need the mask. I said copying over the various dma-related fields from the parent is bogus. I think rxe (and ther other drivers/infiniband/sw drivers) need a simple dma_coerce_mask_and_coherent and nothing else. ^ permalink raw reply [flat|nested] 6+ messages in thread
* RE: WARNING in dma_map_page_attrs 2020-10-27 8:11 ` hch @ 2020-10-27 12:52 ` Parav Pandit 2020-10-28 17:31 ` hch 0 siblings, 1 reply; 6+ messages in thread From: Parav Pandit @ 2020-10-27 12:52 UTC (permalink / raw) To: hch Cc: Jakub Kicinski, syzbot, christian.koenig, dri-devel, iommu, linaro-mm-sig-owner, linaro-mm-sig, linux-kernel, linux-media, m.szyprowski, netdev, robin.murphy, sumit.semwal, syzkaller-bugs, linux-rdma > From: hch@lst.de <hch@lst.de> > Sent: Tuesday, October 27, 2020 1:41 PM > > On Mon, Oct 26, 2020 at 05:23:48AM +0000, Parav Pandit wrote: > > Hi Christoph, > > > > > From: Jakub Kicinski <kuba@kernel.org> > > > Sent: Saturday, October 24, 2020 11:45 PM > > > > > > CC: rdma, looks like rdma from the stack trace > > > > > > On Fri, 23 Oct 2020 20:07:17 -0700 syzbot wrote: > > > > syzbot has found a reproducer for the following issue on: > > > > > > > > HEAD commit: 3cb12d27 Merge tag 'net-5.10-rc1' of > git://git.kernel.org/.. > > > > In [1] you mentioned that dma_mask should not be set for dma_virt_ops. > > So patch [2] removed it. > > > > But check to validate the dma mask for all dma_ops was added in [3]. > > > > What is the right way? Did I misunderstood your comment about > dma_mask in [1]? > > No, I did not say we don't need the mask. I said copying over the various > dma-related fields from the parent is bogus. > > I think rxe (and ther other drivers/infiniband/sw drivers) need a simple > dma_coerce_mask_and_coherent and nothing else. I see. Does below fix make sense? Is DMA_MASK_NONE correct? From cfad78c35788b4ff604abedd96559500c5fd2a72 Mon Sep 17 00:00:00 2001 From: Parav Pandit <parav@nvidia.com> Date: Tue, 27 Oct 2020 14:20:07 +0200 Subject: [PATCH] RDMA: Fix software RDMA drivers for dma mapping error A cited commit in fixes tag avoided setting dma_mask of the ib_device. Commit [1] made dma_mask as mandetory field to be setup even for dma_virt_ops based dma devices. Fix it by setting empty DMA MASK for software based RDMA devices. [1] commit: f959dcd6ddfd2 ("dma-direct: Fix potential NULL pointer dereference") Reported-by: syzbot+34dc2fea3478e659af01@syzkaller.appspotmail.com Fixes: e0477b34d9d1 ("RDMA: Explicitly pass in the dma_device to ib_register_device") Signed-off-by: Parav Pandit <parav@nvidia.com> --- drivers/infiniband/sw/rdmavt/vt.c | 5 +++-- drivers/infiniband/sw/rxe/rxe_verbs.c | 4 +++- drivers/infiniband/sw/siw/siw_main.c | 5 +++-- 3 files changed, 9 insertions(+), 5 deletions(-) diff --git a/drivers/infiniband/sw/rdmavt/vt.c b/drivers/infiniband/sw/rdmavt/vt.c index 52218684ad4a..1b456f4d4fcf 100644 --- a/drivers/infiniband/sw/rdmavt/vt.c +++ b/drivers/infiniband/sw/rdmavt/vt.c @@ -580,8 +580,9 @@ int rvt_register_device(struct rvt_dev_info *rdi) /* DMA Operations */ rdi->ibdev.dev.dma_parms = rdi->ibdev.dev.parent->dma_parms; - dma_set_coherent_mask(&rdi->ibdev.dev, - rdi->ibdev.dev.parent->coherent_dma_mask); + ret = dma_coerce_mask_and_coherent(&rdi->ibdev.dev, DMA_MASK_NONE); + if (ret) + goto bail_wss; /* Protection Domain */ spin_lock_init(&rdi->n_pds_lock); diff --git a/drivers/infiniband/sw/rxe/rxe_verbs.c b/drivers/infiniband/sw/rxe/rxe_verbs.c index 1fc022362fbe..357787688293 100644 --- a/drivers/infiniband/sw/rxe/rxe_verbs.c +++ b/drivers/infiniband/sw/rxe/rxe_verbs.c @@ -1130,7 +1130,9 @@ int rxe_register_device(struct rxe_dev *rxe, const char *ibdev_name) rxe->ndev->dev_addr); dev->dev.dma_parms = &rxe->dma_parms; dma_set_max_seg_size(&dev->dev, UINT_MAX); - dma_set_coherent_mask(&dev->dev, dma_get_required_mask(&dev->dev)); + err = dma_coerce_mask_and_coherent(&dev->dev, DMA_MASK_NONE); + if (err) + return err; dev->uverbs_cmd_mask = BIT_ULL(IB_USER_VERBS_CMD_GET_CONTEXT) | BIT_ULL(IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL) diff --git a/drivers/infiniband/sw/siw/siw_main.c b/drivers/infiniband/sw/siw/siw_main.c index ca8bc7296867..d3dc50a42dab 100644 --- a/drivers/infiniband/sw/siw/siw_main.c +++ b/drivers/infiniband/sw/siw/siw_main.c @@ -384,8 +384,9 @@ static struct siw_device *siw_device_create(struct net_device *netdev) base_dev->dev.parent = parent; base_dev->dev.dma_parms = &sdev->dma_parms; dma_set_max_seg_size(&base_dev->dev, UINT_MAX); - dma_set_coherent_mask(&base_dev->dev, - dma_get_required_mask(&base_dev->dev)); + if (dma_coerce_mask_and_coherent(&base_dev->dev, DMA_MASK_NONE)) + goto error; + base_dev->num_comp_vectors = num_possible_cpus(); xa_init_flags(&sdev->qp_xa, XA_FLAGS_ALLOC1); -- 2.26.2 ^ permalink raw reply related [flat|nested] 6+ messages in thread
* Re: WARNING in dma_map_page_attrs 2020-10-27 12:52 ` Parav Pandit @ 2020-10-28 17:31 ` hch 2020-10-30 9:35 ` Parav Pandit 0 siblings, 1 reply; 6+ messages in thread From: hch @ 2020-10-28 17:31 UTC (permalink / raw) To: Parav Pandit Cc: hch, Jakub Kicinski, syzbot, christian.koenig, dri-devel, iommu, linaro-mm-sig-owner, linaro-mm-sig, linux-kernel, linux-media, m.szyprowski, netdev, robin.murphy, sumit.semwal, syzkaller-bugs, linux-rdma On Tue, Oct 27, 2020 at 12:52:30PM +0000, Parav Pandit wrote: > > > From: hch@lst.de <hch@lst.de> > > Sent: Tuesday, October 27, 2020 1:41 PM > > > > On Mon, Oct 26, 2020 at 05:23:48AM +0000, Parav Pandit wrote: > > > Hi Christoph, > > > > > > > From: Jakub Kicinski <kuba@kernel.org> > > > > Sent: Saturday, October 24, 2020 11:45 PM > > > > > > > > CC: rdma, looks like rdma from the stack trace > > > > > > > > On Fri, 23 Oct 2020 20:07:17 -0700 syzbot wrote: > > > > > syzbot has found a reproducer for the following issue on: > > > > > > > > > > HEAD commit: 3cb12d27 Merge tag 'net-5.10-rc1' of > > git://git.kernel.org/.. > > > > > > In [1] you mentioned that dma_mask should not be set for dma_virt_ops. > > > So patch [2] removed it. > > > > > > But check to validate the dma mask for all dma_ops was added in [3]. > > > > > > What is the right way? Did I misunderstood your comment about > > dma_mask in [1]? > > > > No, I did not say we don't need the mask. I said copying over the various > > dma-related fields from the parent is bogus. > > > > I think rxe (and ther other drivers/infiniband/sw drivers) need a simple > > dma_coerce_mask_and_coherent and nothing else. > > I see. Does below fix make sense? > Is DMA_MASK_NONE correct? DMA_MASK_NONE is gone in 5.10. I think you want DMA_BIT_MASK(64). That isn't actually correct for 32-bit platforms, but good enough. ^ permalink raw reply [flat|nested] 6+ messages in thread
* RE: WARNING in dma_map_page_attrs 2020-10-28 17:31 ` hch @ 2020-10-30 9:35 ` Parav Pandit 0 siblings, 0 replies; 6+ messages in thread From: Parav Pandit @ 2020-10-30 9:35 UTC (permalink / raw) To: hch Cc: Jakub Kicinski, syzbot, christian.koenig, dri-devel, iommu, linaro-mm-sig-owner, linaro-mm-sig, linux-kernel, linux-media, m.szyprowski, netdev, robin.murphy, sumit.semwal, syzkaller-bugs, linux-rdma > From: hch@lst.de <hch@lst.de> > Sent: Wednesday, October 28, 2020 11:01 PM > > On Tue, Oct 27, 2020 at 12:52:30PM +0000, Parav Pandit wrote: > > > > > From: hch@lst.de <hch@lst.de> > > > Sent: Tuesday, October 27, 2020 1:41 PM > > > > > > On Mon, Oct 26, 2020 at 05:23:48AM +0000, Parav Pandit wrote: > > > > Hi Christoph, > > > > > > > > > From: Jakub Kicinski <kuba@kernel.org> > > > > > Sent: Saturday, October 24, 2020 11:45 PM > > > > > > > > > > CC: rdma, looks like rdma from the stack trace > > > > > > > > > > On Fri, 23 Oct 2020 20:07:17 -0700 syzbot wrote: > > > > > > syzbot has found a reproducer for the following issue on: > > > > > > > > > > > > HEAD commit: 3cb12d27 Merge tag 'net-5.10-rc1' of > > > git://git.kernel.org/.. > > > > > > > > In [1] you mentioned that dma_mask should not be set for > dma_virt_ops. > > > > So patch [2] removed it. > > > > > > > > But check to validate the dma mask for all dma_ops was added in [3]. > > > > > > > > What is the right way? Did I misunderstood your comment about > > > dma_mask in [1]? > > > > > > No, I did not say we don't need the mask. I said copying over the > > > various dma-related fields from the parent is bogus. > > > > > > I think rxe (and ther other drivers/infiniband/sw drivers) need a > > > simple dma_coerce_mask_and_coherent and nothing else. > > > > I see. Does below fix make sense? > > Is DMA_MASK_NONE correct? > > DMA_MASK_NONE is gone in 5.10. I think you want DMA_BIT_MASK(64). > That isn't actually correct for 32-bit platforms, but good enough. Ok. thanks for the input. Sending updated fix to set 64-bit mask for 64-bit platform and 32-bit mask otherwise. ^ permalink raw reply [flat|nested] 6+ messages in thread
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2020-10-24 18:15 ` WARNING in dma_map_page_attrs Jakub Kicinski
2020-10-26 5:23 ` Parav Pandit
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