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commit cf76c364a1e1e5224af80edf70a1e3023e1fcf8c
parent 369af92ce47a04b2523ec4feea1febcacf8419b1
Author: Linus Torvalds <torvalds@linux-foundation.org>
Date:   Wed,  5 Dec 2018 17:06:31 -0800

Merge tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi

Pull SCSI fixes from James Bottomley:
 "Four obvious bug fixes. The vmw_pscsi is so old that it's amazing
  no-one noticed before now"

* tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi:
  scsi: storvsc: Fix a race in sub-channel creation that can cause panic
  scsi: vmw_pscsi: Rearrange code to avoid multiple calls to free_irq during unload
  scsi: libiscsi: Fix NULL pointer dereference in iscsi_eh_session_reset
  scsi: lpfc: fix block guard enablement on SLI3 adapters

Diffstat:
Mdrivers/scsi/libiscsi.c | 4++--
Mdrivers/scsi/lpfc/lpfc_init.c | 6+++++-
Mdrivers/scsi/lpfc/lpfc_sli.c | 1-
Mdrivers/scsi/storvsc_drv.c | 61++++++++++++++++++++++++++++++-------------------------------
Mdrivers/scsi/vmw_pvscsi.c | 4++--
5 files changed, 39 insertions(+), 37 deletions(-)

diff --git a/drivers/scsi/libiscsi.c b/drivers/scsi/libiscsi.c @@ -2416,8 +2416,8 @@ int iscsi_eh_session_reset(struct scsi_cmnd *sc) failed: ISCSI_DBG_EH(session, "failing session reset: Could not log back into " - "%s, %s [age %d]\n", session->targetname, - conn->persistent_address, session->age); + "%s [age %d]\n", session->targetname, + session->age); spin_unlock_bh(&session->frwd_lock); mutex_unlock(&session->eh_mutex); return FAILED; diff --git a/drivers/scsi/lpfc/lpfc_init.c b/drivers/scsi/lpfc/lpfc_init.c @@ -167,7 +167,11 @@ lpfc_config_port_prep(struct lpfc_hba *phba) sizeof(phba->wwpn)); } - phba->sli3_options = 0x0; + /* + * Clear all option bits except LPFC_SLI3_BG_ENABLED, + * which was already set in lpfc_get_cfgparam() + */ + phba->sli3_options &= (uint32_t)LPFC_SLI3_BG_ENABLED; /* Setup and issue mailbox READ REV command */ lpfc_read_rev(phba, pmb); diff --git a/drivers/scsi/lpfc/lpfc_sli.c b/drivers/scsi/lpfc/lpfc_sli.c @@ -4965,7 +4965,6 @@ lpfc_sli_config_port(struct lpfc_hba *phba, int sli_mode) phba->sli3_options &= ~(LPFC_SLI3_NPIV_ENABLED | LPFC_SLI3_HBQ_ENABLED | LPFC_SLI3_CRP_ENABLED | - LPFC_SLI3_BG_ENABLED | LPFC_SLI3_DSS_ENABLED); if (rc != MBX_SUCCESS) { lpfc_printf_log(phba, KERN_ERR, LOG_INIT, diff --git a/drivers/scsi/storvsc_drv.c b/drivers/scsi/storvsc_drv.c @@ -446,7 +446,6 @@ struct storvsc_device { bool destroy; bool drain_notify; - bool open_sub_channel; atomic_t num_outstanding_req; struct Scsi_Host *host; @@ -636,33 +635,38 @@ get_in_err: static void handle_sc_creation(struct vmbus_channel *new_sc) { struct hv_device *device = new_sc->primary_channel->device_obj; + struct device *dev = &device->device; struct storvsc_device *stor_device; struct vmstorage_channel_properties props; + int ret; stor_device = get_out_stor_device(device); if (!stor_device) return; - if (stor_device->open_sub_channel == false) - return; - memset(&props, 0, sizeof(struct vmstorage_channel_properties)); - vmbus_open(new_sc, - storvsc_ringbuffer_size, - storvsc_ringbuffer_size, - (void *)&props, - sizeof(struct vmstorage_channel_properties), - storvsc_on_channel_callback, new_sc); + ret = vmbus_open(new_sc, + storvsc_ringbuffer_size, + storvsc_ringbuffer_size, + (void *)&props, + sizeof(struct vmstorage_channel_properties), + storvsc_on_channel_callback, new_sc); - if (new_sc->state == CHANNEL_OPENED_STATE) { - stor_device->stor_chns[new_sc->target_cpu] = new_sc; - cpumask_set_cpu(new_sc->target_cpu, &stor_device->alloced_cpus); + /* In case vmbus_open() fails, we don't use the sub-channel. */ + if (ret != 0) { + dev_err(dev, "Failed to open sub-channel: err=%d\n", ret); + return; } + + /* Add the sub-channel to the array of available channels. */ + stor_device->stor_chns[new_sc->target_cpu] = new_sc; + cpumask_set_cpu(new_sc->target_cpu, &stor_device->alloced_cpus); } static void handle_multichannel_storage(struct hv_device *device, int max_chns) { + struct device *dev = &device->device; struct storvsc_device *stor_device; int num_cpus = num_online_cpus(); int num_sc; @@ -679,22 +683,12 @@ static void handle_multichannel_storage(struct hv_device *device, int max_chns) request = &stor_device->init_request; vstor_packet = &request->vstor_packet; - stor_device->open_sub_channel = true; /* * Establish a handler for dealing with subchannels. */ vmbus_set_sc_create_callback(device->channel, handle_sc_creation); /* - * Check to see if sub-channels have already been created. This - * can happen when this driver is re-loaded after unloading. - */ - - if (vmbus_are_subchannels_present(device->channel)) - return; - - stor_device->open_sub_channel = false; - /* * Request the host to create sub-channels. */ memset(request, 0, sizeof(struct storvsc_cmd_request)); @@ -710,23 +704,29 @@ static void handle_multichannel_storage(struct hv_device *device, int max_chns) VM_PKT_DATA_INBAND, VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED); - if (ret != 0) + if (ret != 0) { + dev_err(dev, "Failed to create sub-channel: err=%d\n", ret); return; + } t = wait_for_completion_timeout(&request->wait_event, 10*HZ); - if (t == 0) + if (t == 0) { + dev_err(dev, "Failed to create sub-channel: timed out\n"); return; + } if (vstor_packet->operation != VSTOR_OPERATION_COMPLETE_IO || - vstor_packet->status != 0) + vstor_packet->status != 0) { + dev_err(dev, "Failed to create sub-channel: op=%d, sts=%d\n", + vstor_packet->operation, vstor_packet->status); return; + } /* - * Now that we created the sub-channels, invoke the check; this - * may trigger the callback. + * We need to do nothing here, because vmbus_process_offer() + * invokes channel->sc_creation_callback, which will open and use + * the sub-channel(s). */ - stor_device->open_sub_channel = true; - vmbus_are_subchannels_present(device->channel); } static void cache_wwn(struct storvsc_device *stor_device, @@ -1794,7 +1794,6 @@ static int storvsc_probe(struct hv_device *device, } stor_device->destroy = false; - stor_device->open_sub_channel = false; init_waitqueue_head(&stor_device->waiting_to_drain); stor_device->device = device; stor_device->host = host; diff --git a/drivers/scsi/vmw_pvscsi.c b/drivers/scsi/vmw_pvscsi.c @@ -1202,8 +1202,6 @@ static void pvscsi_shutdown_intr(struct pvscsi_adapter *adapter) static void pvscsi_release_resources(struct pvscsi_adapter *adapter) { - pvscsi_shutdown_intr(adapter); - if (adapter->workqueue) destroy_workqueue(adapter->workqueue); @@ -1534,6 +1532,7 @@ static int pvscsi_probe(struct pci_dev *pdev, const struct pci_device_id *id) out_reset_adapter: ll_adapter_reset(adapter); out_release_resources: + pvscsi_shutdown_intr(adapter); pvscsi_release_resources(adapter); scsi_host_put(host); out_disable_device: @@ -1542,6 +1541,7 @@ out_disable_device: return error; out_release_resources_and_disable: + pvscsi_shutdown_intr(adapter); pvscsi_release_resources(adapter); goto out_disable_device; }