- 02 Sep, 2016 16 commits
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Harish Chegondi authored
The global variable n_krcvqs stores the sum of the number of kernel receive queues of VLs 0-7 which the user can pass to the driver through the module parameter array krcvqs which is of type unsigned integer. If the user passes large value(s) into krcvqs parameter array, it can cause an arithmetic overflow while calculating n_krcvqs which is also of type unsigned int. The overflow results in an incorrect value of n_krcvqs which can lead to kernel crash while loading the driver. Fix by changing the data type of n_krcvqs to unsigned long. This patch also changes the data type of other variables that get their values from n_krcvqs. Reviewed-by:
Dennis Dalessandro <dennis.dalessandro@intel.com> Signed-off-by:
Harish Chegondi <harish.chegondi@intel.com> Signed-off-by:
Doug Ledford <dledford@redhat.com>
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Dean Luick authored
Sometimes a QSFP device does not respond in the expected time after a power-on. Add a read pre-check/retry when starting the link on driver load. Reviewed-by:
Easwar Hariharan <easwar.hariharan@intel.com> Signed-off-by:
Dean Luick <dean.luick@intel.com> Signed-off-by:
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Jubin John authored
In the set_txreq_header_ahg(), The KDETH Intr bit is obtained from the header in the user sdma request using a KDETH_GET shift and mask macro. This value is then futher right shifted by 16 causing us to lose the value i.e it is shifted to zero, leading to the following smatch warning: drivers/infiniband/hw/hfi1/user_sdma.c:1482 set_txreq_header_ahg() warn: mask and shift to zero The Intr bit should be left shifted into its correct position in the KDETH header before the AHG update. Reported-by:
Dan Carpenter <dan.carpenter@oracle.com> Reviewed-by:
Mitko Haralanov <mitko.haralanov@intel.com> Reviewed-by:
Jubin John <jubin.john@intel.com> Signed-off-by:
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Sebastian Sanchez authored
When trying to align the source pointer and there's a byte carry in an SGE copy, bytes are borrowed from the next quad-word X to complete the required quad-word copy. Then, the SGE length is reduced by the number of borrowed bytes. After this, if the remaining number of bytes from quad-word X (extra bytes) is greater than the new SGE length, the number of extra bytes needs to be updated to the new SGE length. Otherwise, when the SGE length gets updated again after the extra bytes are read to create the new byte carry, it goes negative, which then becomes a very large number as the SGE length is an unsigned integer. This causes SGE buffer to be over-read. Reviewed-by:
Sebastian Sanchez <sebastian.sanchez@intel.com> Signed-off-by:
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Leon Romanovsky authored
Remove returning errors from mlx5 poll_cq function. Polling CQ operation in kernel never fails by Mellanox HCA architecture and respective driver design. Signed-off-by:
Leon Romanovsky <leonro@mellanox.com> Signed-off-by:
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Yishai Hadas authored
Use TIR number based on selector, it should be done to differentiate between RSS QP to RAW one. Reported-by:
Sagi Grimberg <sagi@grimberg.me> Signed-off-by:
Yishai Hadas <yishaih@mellanox.com> Signed-off-by:
Leon Romanovsky <leon@kernel.org> Tested-by:
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Leon Romanovsky authored
Return variable was set in a line before the actual return was called in begin_wqe function. This patch removes such variable and simplifies the code. Signed-off-by:
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Chuck Lever authored
The returned value should be EINVAL, because it is caused by wrong caller and not by internal overflow event. Signed-off-by:
Chuck Lever <chuck.lever@oracle.com> Signed-off-by:
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Leon Romanovsky authored
Remove returning errors from mlx4 poll_cq function. Polling CQ operation in kernel never fails by Mellanox HCA architecture and respective driver design. Signed-off-by:
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Leon Romanovsky authored
By Mellanox HW design and SW implementation, poll_cq never fails and returns errors, so all these printks are to catch ULP bugs. In case of such bug, the reverted patch will cause reentry of the function, resulting in a printk storm. This reverts commit 5412352f ("IB/mlx4: Return EAGAIN for any error in mlx4_ib_poll_one") Signed-off-by:
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Erez Shitrit authored
When a new CM connection is being requested, ipoib driver copies data from the path pointer in the CM/tx object, the path object might be invalid at the point and memory corruption will happened later when now the CM driver will try using that data. The next scenario demonstrates it: neigh_add_path --> ipoib_cm_create_tx --> queue_work (pointer to path is in the cm/tx struct) #while the work is still in the queue, #the port goes down and causes the ipoib_flush_paths: ipoib_flush_paths --> path_free --> kfree(path) #at this point the work scheduled starts. ipoib_cm_tx_start --> copy from the (invalid)path pointer: (memcpy(&pathrec, &p->path->pathrec, sizeof pathrec);) -> memory corruption. To fix that the driver now starts the CM/tx connection only if that specific path exists in the general paths database. This check is protected with the relevant locks, and uses the gid from the neigh member in the CM/tx object which is valid according to the ref count that was taken by the CM/tx. Fixes: 839fcaba ('IPoIB: Connected mode experimental support') Signed-off-by:
Erez Shitrit <erezsh@mellanox.com> Signed-off-by:
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Erez Shitrit authored
The function send_leave sets the member: group->query_id (group->query_id = ret) after calling the sa_query, but leave_handler can be executed before the setting and it might delete the group object, and will get a memory corruption. Additionally, this patch gets rid of group->query_id variable which is not used. Fixes: faec2f7b ('IB/sa: Track multicast join/leave requests') Signed-off-by:
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Baoyou Xie authored
We get 1 warning when build kernel with W=1: drivers/infiniband/hw/cxgb4/qp.c:686:6: warning: no previous prototype for '_free_qp' [-Wmissing-prototypes] In fact, this function is only used in the file in which it is declared and don't need a declaration, but can be made static. so this patch marks it 'static'. Signed-off-by:
Baoyou Xie <baoyou.xie@linaro.org> Reviewed-by:
Yuval Shaia <yuval.shaia@oracle.com> Reviewed-by:
Steve Wise <swise@opengridcomputing.com> Signed-off-by:
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Raju Rangoju authored
When the low level driver exercises the hot unplug they would call rdma_cm cma_remove_one which would fire DEVICE_REMOVAL event to all cma consumers. Now, if consumer doesn't make sure they destroy all IB objects created on that IB device instance prior to finalizing all processing of DEVICE_REMOVAL callback, rdma_cm will let the lld to de-register with IB core and destroy the IB device instance. And if the consumer calls (say) ib_dereg_mr(), it will crash since that dev object is NULL. In the current implementation, iser-target just initiates the cleanup and returns from DEVICE_REMOVAL callback. This deferred work creates a race between iser-target cleaning IB objects(say MR) and lld destroying IB device instance. This patch includes the following fixes -> make sure that consumer frees all IB objects associated with device instance -> return non-zero from the callback to destroy the rdma_cm id Signed-off-by:Raju Rangoju <rajur@chelsio.com> Acked-by:
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Christophe Jaillet authored
The 2nd parameter of 'find_first_bit' is the number of bits to search. In this case, we are passing 'sizeof(u64)' which is 8. It is likely that the number of bits of 'port_mask' was expected here. Use sizeof() * 8 to get the correct number. It has been spotted by the following coccinelle script: @@ expression ret, x; @@ * ret = \(find_first_bit \| find_first_zero_bit\) (x, sizeof(...)); Signed-off-by:
Christophe JAILLET <christophe.jaillet@wanadoo.fr> Signed-off-by:
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Christophe Jaillet authored
The 2nd parameter of 'find_first_bit' is the number of bits to search. In this case, we are passing 'sizeof(tmp)' which is likely to be 4 or 8 because 'tmp' is an 'unsigned long'. It is likely that the number of bits of 'tmp' was expected here. So use BITS_PER_LONG instead. It has been spotted by the following coccinelle script: @@ expression ret, x; @@ * ret = \(find_first_bit \| find_first_zero_bit\) (x, sizeof(...)); Signed-off-by:
Majd Dibbiny <majd@mellanox.com> Acked-by:
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- 26 Aug, 2016 3 commits
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Christophe Jaillet authored
In all other places in this file where 'find_first_bit' is called, port_num is defined as a 'u8' and no casting is done. Do the same here in order to be more consistent. Signed-off-by:
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Shiraz Saleem authored
Device notifications are not received after the first interface is closed; since there is an unregister for notifications on every interface close. Correct this by unregistering for device notifications only when the last interface is closed. Also, make all operations on the i40iw_notifiers_registered atomic as it can be read/modified concurrently. Fixes: 8e06af71 ("i40iw: add main, hdr, status") Signed-off-by:
Mustafa Ismail <mustafa.ismail@intel.com> Signed-off-by:
Shiraz Saleem <shiraz.saleem@intel.com> Signed-off-by:
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Mustafa Ismail authored
Update iwqp->hw_iwarp_state to reflect the new state of the CQP modify QP operation. This avoids reissuing a CQP operation to modify a QP to a state that it is already in. Fixes: 4e9042e6 ("i40iw: add hw and utils files") Reported-by:
Stefan Assmann <sassmann@redhat.com> Signed-off-by:
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- 25 Aug, 2016 2 commits
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Doug Ledford authored
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Tatyana Nikolova authored
Send a zero length last streaming mode message for loopback connections to synchronize between accepting QP and connecting QP. This avoids data transfer to start on the accepting QP before the connecting QP is in RTS. Also remove function i40iw_loopback_nop() as it is no longer used. Fixes: f27b4746 ("i40iw: add connection management code") Signed-off-by:
Tatyana Nikolova <tatyana.e.nikolova@intel.com> Signed-off-by:
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- 24 Aug, 2016 7 commits
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Doug Ledford authored
If port_guid is set with the default subnet_prefix, then we get a change event and run a port refresh, we don't update the port_guid. As a result, attempts to create a target device that uses the new subnet_prefix in the wwn will fail to find a match and be rejected by the ib_srpt driver. This makes it impossible to configure a port if it was initialized with a default subnet_prefix and later changed to any non-default subnet-prefix. Updating the port refresh task to always update the wwn based upon the current subnext_prefix solves this problem. Cc: Bart Van Assche <bart.vanassche@sandisk.com> Cc: nab@linux-iscsi.org Signed-off-by: -
Selvin Xavier authored
Current driver is reporting wrong values for max_sge and max_sge_rd in query_device. This breaks the nfs rdma and iser in some device profiles. Fixing the driver to report correct values from FW. Signed-off-by:
Selvin Xavier <selvin.xavier@broadcom.com> Signed-off-by:
Devesh Sharma <devesh.sharma@broadcom.com> Signed-off-by:
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Mustafa Ismail authored
iwpbl->iwmr points to the structure that contains iwpbl, which is iwmr. Setting this to NULL would result in writing to freed memory. So just free iwmr, and return. Fixes: d3749841 ("i40iw: add files for iwarp interface") Reported-by:
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Mustafa Ismail authored
Memory allocated for iwqp; iwqp->allocated_buffer is freed twice in the create_qp error path. Correct this by having it freed only once in i40iw_free_qp_resources(). Fixes: d3749841 ("i40iw: add files for iwarp interface") Signed-off-by:
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Chris Wilson authored
This file does not use any structs or functions defined by io-mapping.h (nor does it directly use iomap, ioremap, iounamp or friends). Remove it to simplify verification of changes to io-mapping.h The include existed since its inception in commit e126ba97 Author: Eli Cohen <eli@mellanox.com> Date: Sun Jul 7 17:25:49 2013 +0300 mlx5: Add driver for Mellanox Connect-IB adapters which looks like a copy across from the Mellanox ethernet driver. Signed-off-by:
Chris Wilson <chris@chris-wilson.co.uk> Cc: Eli Cohen <eli@mellanox.com> Cc: Jack Morgenstein <jackm@dev.mellanox.co.il> Cc: Or Gerlitz <ogerlitz@mellanox.com> Cc: Matan Barak <matanb@mellanox.com> Cc: Leon Romanovsky <leonro@mellanox.com> Cc: Doug Ledford <dledford@redhat.com> Cc: Sean Hefty <sean.hefty@intel.com> Cc: Hal Rosenstock <hal.rosenstock@gmail.com> Cc: linux-rdma@vger.kernel.org Reviewed-by:
Laurence Oberman <loberman@redhat.com> Tested-by:
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Mustafa Ismail authored
In i40iw_free_virt_mem(), do not set mem->va to NULL after freeing it as mem->va is a self-referencing pointer to mem. Fixes: 4e9042e6 ("i40iw: add hw and utils files") Reported-by:
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Shiraz Saleem authored
Add NULL check for pdata and pdata->addr before the memcpy in i40iw_form_cm_frame(). This fixes a NULL pointer de-reference which occurs when the MPA private data pointer is NULL. Also only copy pdata->size bytes in the memcpy to prevent reading past the length of the private data buffer provided by upper layer. Fixes: f27b4746 ("i40iw: add connection management code") Reported-by:
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- 23 Aug, 2016 6 commits
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Bharat Potnuri authored
Current cxgb4 arm CQ logic ignores IB_CQ_REPORT_MISSED_EVENTS for request completion notification on a CQ. Due to this ib_poll_handler() assumes all events polled and avoids further iopoll scheduling. This patch adds logic to cxgb4 ib_req_notify_cq() handler to check if CQ is not empty and return accordingly. Based on the return value of ib_req_notify_cq() handler, ib_poll_handler() will schedule a run of iopoll handler. Signed-off-by:
Potnuri Bharat Teja <bharat@chelsio.com> Reviewed-by:
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Mustafa Ismail authored
In i40iw_open(), check if interface is already open and return success if it is. Fixes: 8e06af71 ("i40iw: add main, hdr, status") Reported-by:
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Mustafa Ismail authored
In i40iw_alloc_resource(), ensure that the update to req_resource_num is protected by the lock. Fixes: 8e06af71 ("i40iw: add main, hdr, status") Reported-by:
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Shiraz Saleem authored
iwdev->mem_resources is incorrectly defined as an unsigned long instead of u8. As a result, the offset into the dynamic allocated structures in i40iw_initialize_hw_resources() is incorrectly calculated and would lead to writing of memory regions outside of the allocated buffer. Fixes: 8e06af71 ("i40iw: add main, hdr, status") Reported-by:
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Markus Elfring authored
* Reuse existing functionality from memdup_user() instead of keeping duplicate source code. This issue was detected by using the Coccinelle software. * The local variable "ret" will be set to an appropriate value a bit later. Thus omit the explicit initialisation at the beginning. Signed-off-by:
Markus Elfring <elfring@users.sourceforge.net> Signed-off-by:
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Markus Elfring authored
Reuse existing functionality from memdup_user() instead of keeping duplicate source code. This issue was detected by using the Coccinelle software. Signed-off-by:
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- 22 Aug, 2016 6 commits
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Steve Wise authored
The i40iw initiator sends an MPA-request with ird=16 and ord=16. The cxgb4 responder sends an MPA-reply with ord = 32 causing i40iw to terminate due to insufficient resources. The logic to reduce the ORD to <= peer's IRD was wrong. Reported-by:
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Steve Wise authored
The i40iw initiator sends an MPA-request with ird = 63, ord = 63. The cxgb4 responder sends a RST. Since the inbound ord=63 and it exceeds the max_ird/c4iw_max_read_depth (=32 default), chelsio decides to abort. Instead, cxgb4 should adjust the ord/ird down before presenting it to the ULP. Reported-by:
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Ira Weiny authored
Testing with CONFIG_SLUB_DEBUG_ON=y resulted in the kernel panic below. This is the result of the mm_struct sometimes being free'd prior to hfi1_file_close being called. This was due to the combination of 2 reasons: 1) hfi1_file_close is deferred in process exit and it therefore may not be called synchronously with process exit. 2) exit_mm is called prior to exit_files in do_exit. Normally this is ok however, our kernel bypass code requires us to have access to the mm_struct for house keeping both at "normal" close time as well as at process exit. Therefore, the fix is to simply keep a reference to the mm_struct until we are done with it. [ 3006.340150] general protection fault: 0000 [#1] SMP [ 3006.346469] Modules linked in: hfi1 rdmavt rpcrdma ib_isert iscsi_target_mod ib_iser libiscsi scsi_transport_iscsi ib_srpt target_core_mod ib_srp scsi_transport_srp ib_ipoib rdma_ucm ib_ucm ib_uverbs ib_umad rdma_cm ib_cm iw_cm dm_mirror dm_region_hash dm_log dm_mod snd_hda_code c_realtek iTCO_wdt snd_hda_codec_generic iTCO_vendor_support sb_edac edac_core x86_pkg_temp_thermal intel_powerclamp coretemp kvm irqbypass c rct10dif_pclmul crc32_pclmul ghash_clmulni_intel aesni_intel lrw snd_hda_intel gf128mul snd_hda_codec glue_helper snd_hda_core ablk_helper sn d_hwdep cryptd snd_seq snd_seq_device snd_pcm snd_timer snd soundcore pcspkr shpchp mei_me sg lpc_ich mei i2c_i801 mfd_core ioatdma ipmi_devi ntf wmi ipmi_si ipmi_msghandler acpi_cpufreq nfsd auth_rpcgss nfs_acl lockd grace sunrpc ip_tables ext4 jbd2 mbcache mlx4_en ib_core sr_mod s d_mod cdrom crc32c_intel mgag200 drm_kms_helper syscopyarea sysfillrect igb sysimgblt fb_sys_fops ptp mlx4_core ttm isci pps_core ahci drm li bsas libahci dca firewire_ohci i2c_algo_bit scsi_transport_sas firewire_core crc_itu_t i2c_core libata [last unloaded: mlx4_ib] [ 3006.461759] CPU: 16 PID: 11624 Comm: mpi_stress Not tainted 4.7.0-rc5+ #1 [ 3006.469915] Hardware name: Intel Corporation W2600CR ........../W2600CR, BIOS SE5C600.86B.01.08.0003.022620131521 02/26/2013 [ 3006.483027] task: ffff8804102f0040 ti: ffff8804102f8000 task.ti: ffff8804102f8000 [ 3006.491971] RIP: 0010:[<ffffffff810f0383>] [<ffffffff810f0383>] __lock_acquire+0xb3/0x19e0 [ 3006.501905] RSP: 0018:ffff8804102fb908 EFLAGS: 00010002 [ 3006.508447] RAX: 6b6b6b6b6b6b6b6b RBX: 0000000000000001 RCX: 0000000000000000 [ 3006.517012] RDX: 0000000000000001 RSI: 0000000000000000 RDI: ffff880410b56a40 [ 3006.525569] RBP: ffff8804102fb9b0 R08: 0000000000000001 R09: 0000000000000000 [ 3006.534119] R10: ffff8804102f0040 R11: 0000000000000000 R12: 0000000000000000 [ 3006.542664] R13: ffff880410b56a40 R14: 0000000000000000 R15: 0000000000000000 [ 3006.551203] FS: 00007ff478c08700(0000) GS:ffff88042e200000(0000) knlGS:0000000000000000 [ 3006.560814] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 3006.567806] CR2: 00007f667f5109e0 CR3: 0000000001c06000 CR4: 00000000000406e0 [ 3006.576352] Stack: [ 3006.579157] ffffffff8124b819 ffffffffffffffff 0000000000000000 ffff8804102fb940 [ 3006.588072] 0000000000000002 0000000000000000 ffff8804102f0040 0000000000000007 [ 3006.596971] 0000000000000006 ffff8803cad6f000 0000000000000000 ffff8804102f0040 [ 3006.605878] Call Trace: [ 3006.609220] [<ffffffff8124b819>] ? uncharge_batch+0x109/0x250 [ 3006.616382] [<ffffffff810f2313>] lock_acquire+0xd3/0x220 [ 3006.623056] [<ffffffffa0a30bfc>] ? hfi1_release_user_pages+0x7c/0xa0 [hfi1] [ 3006.631593] [<ffffffff81775579>] down_write+0x49/0x80 [ 3006.638022] [<ffffffffa0a30bfc>] ? hfi1_release_user_pages+0x7c/0xa0 [hfi1] [ 3006.646569] [<ffffffffa0a30bfc>] hfi1_release_user_pages+0x7c/0xa0 [hfi1] [ 3006.654898] [<ffffffffa0a2efb6>] cacheless_tid_rb_remove+0x106/0x330 [hfi1] [ 3006.663417] [<ffffffff810efd36>] ? mark_held_locks+0x66/0x90 [ 3006.670498] [<ffffffff817771f6>] ? _raw_spin_unlock_irqrestore+0x36/0x60 [ 3006.678741] [<ffffffffa0a2f1ee>] tid_rb_remove+0xe/0x10 [hfi1] [ 3006.686010] [<ffffffffa0a0c5d5>] hfi1_mmu_rb_unregister+0xc5/0x100 [hfi1] [ 3006.694387] [<ffffffffa0a2fcb9>] hfi1_user_exp_rcv_free+0x39/0x120 [hfi1] [ 3006.702732] [<ffffffffa09fc6ea>] hfi1_file_close+0x17a/0x330 [hfi1] [ 3006.710489] [<ffffffff81263e9a>] __fput+0xfa/0x230 [ 3006.716595] [<ffffffff8126400e>] ____fput+0xe/0x10 [ 3006.722696] [<ffffffff810b95c6>] task_work_run+0x86/0xc0 [ 3006.729379] [<ffffffff81099933>] do_exit+0x323/0xc40 [ 3006.735672] [<ffffffff8109a2dc>] do_group_exit+0x4c/0xc0 [ 3006.742371] [<ffffffff810a7f55>] get_signal+0x345/0x940 [ 3006.748958] [<ffffffff810340c7>] do_signal+0x37/0x700 [ 3006.755328] [<ffffffff8127872a>] ? poll_select_set_timeout+0x5a/0x90 [ 3006.763146] [<ffffffff811609cb>] ? __audit_syscall_exit+0x1db/0x260 [ 3006.770853] [<ffffffff8110f3e3>] ? rcu_read_lock_sched_held+0x93/0xa0 [ 3006.778765] [<ffffffff812347a4>] ? kfree+0x1e4/0x2a0 [ 3006.784986] [<ffffffff8108e75a>] ? exit_to_usermode_loop+0x33/0xac [ 3006.792551] [<ffffffff8108e785>] exit_to_usermode_loop+0x5e/0xac [ 3006.799907] [<ffffffff81003dca>] do_syscall_64+0x12a/0x190 [ 3006.806664] [<ffffffff81777a7f>] entry_SYSCALL64_slow_path+0x25/0x25 [ 3006.814396] Code: 24 08 44 89 44 24 10 89 4c 24 18 e8 a8 d8 ff ff 48 85 c0 8b 4c 24 18 44 8b 44 24 10 44 8b 4c 24 08 4c 8b 14 24 0f 84 30 08 00 00 <f0> ff 80 98 01 00 00 8b 3d 48 ad be 01 45 8b a2 90 0b 00 00 85 [ 3006.837158] RIP [<ffffffff810f0383>] __lock_acquire+0xb3/0x19e0 [ 3006.844401] RSP <ffff8804102fb908> [ 3006.851170] ---[ end trace b7b9f21cf06c27df ]--- [ 3006.927420] Kernel panic - not syncing: Fatal exception [ 3006.933954] Kernel Offset: disabled [ 3006.940961] ---[ end Kernel panic - not syncing: Fatal exception [ 3006.948249] ------------[ cut here ]------------ Fixes: 3faa3d9a ("IB/hfi1: Make use of mm consistent") Reviewed-by:
Ira Weiny <ira.weiny@intel.com> Signed-off-by:
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Mike Marciniszyn authored
The unwind logic for creating a user QP has a double vfree of the non-shared receive queue when handling a "too many qps" failure. The code unwinds the mmmap info by decrementing a reference count which will call rvt_release_mmap_info() which in turn does the vfree() of the r_rq.wq. The unwind code then does the same free. Fix by guarding the vfree() with the same test that is done in close and only do the vfree() if qp->ip is NULL. Reviewed-by:
Mike Marciniszyn <mike.marciniszyn@intel.com> Signed-off-by:
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Mitko Haralanov authored
Previously, J_KEY generation was based on the lower 16 bits of the user's UID. While this works, it was not good enough as a non-root user could collide with a root user given a sufficiently large UID. This patch attempt to improve the J_KEY generation by using the following algorithm: The 16 bit J_KEY space is partitioned into 3 separate spaces reserved for different user classes: * all users with administtor privileges (including 'root') will use J_KEYs in the range of 0 to 31, * all kernel protocols, which use KDETH packets will use J_KEYs in the range of 32 to 63, and * all other users will use J_KEYs in the range of 64 to 65535. The above separation is aimed at preventing different user levels from sending packets to each other and, additionally, separate kernel protocols from all other types of users. The later is meant to prevent the potential corruption of kernel memory by any other type of user. Reviewed-by: -
Easwar Hariharan authored
The driver does not check if the CableInfo query is supported for the port type. Return early if CableInfo is not supported for the port type, making compliance with the specification explicit and preventing lower level code from potentially doing the wrong thing if the query is not supported for the hardware implementation. Reviewed-by:
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