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Sashiko AI review found 1 potential issue(s) to consider: > - [High] ice: virtchnl error path disables wrong queues when loop index != queue_id unlikely error, but easy to fix, will do as v3 is needed anyway > -- > > commit a7e9d03ecfb2e4d593b7ee51e67a3a4e87ee7a85 > Author: Przemek Kitszel > > ice: bump to 256qs for VF > > This commit adjusts limits, bitmaps, and arrays in the ice driver to support > up to 256 VF queues. It updates the requested and default queue limits while > retaining the legacy 16-queue limit for older virtchnl opcodes. > >> diff --git a/drivers/net/ethernet/intel/ice/virt/queues.c b/drivers/net/ethernet/intel/ice/virt/queues.c >> index 2667634e3c8c3..61304493af34b 100644 >> --- a/drivers/net/ethernet/intel/ice/virt/queues.c >> +++ b/drivers/net/ethernet/intel/ice/virt/queues.c > [ ... ] >> @@ -841,7 +841,7 @@ int ice_vc_cfg_qs_msg(struct ice_vf *vf, u8 *msg) >> if (!vsi) >> goto error_param; >> >> - if (qci->num_queue_pairs > ICE_MAX_QS_PER_VF_VCV1 || >> + if (qci->num_queue_pairs > ICE_MAX_QS_PER_VF || >> qci->num_queue_pairs > min_t(u16, vsi->alloc_txq, vsi->alloc_rxq)) { >> dev_err(ice_pf_to_dev(pf), "VF-%d requesting more than supported number of queues: %d\n", >> vf->vf_id, min_t(u16, vsi->alloc_txq, vsi->alloc_rxq)); > > [Severity: High] > With the queue limit raised to 256, does the error handling at the end of > ice_vc_cfg_qs_msg() disable the correct queues when a failure occurs? > > Since 256 queue pairs exceed the 4096-byte admin queue buffer limit, the VF > driver must split queue configurations across multiple virtchnl messages. In > the second and subsequent messages, the array index i will not match the > actual queue ID being configured (qci->qpair[i].rxq.queue_id). > > If an error occurs during these later messages, the cleanup path iterates > using the array index i: > > error_param: > /* disable whatever we can */ > for (; i >= 0; i--) { > if (ice_vsi_ctrl_one_rx_ring(vsi, false, i, true)) > ... > if (ice_vf_vsi_dis_single_txq(vf, vsi, i)) > ... > } > > Could this use of i instead of the actual queue ID inadvertently disable > unrelated queues, causing a denial of service to other active queue pairs, > while leaving the newly configured, partially-initialized queues active? >