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SCSI fixes on 20170808

Browse Source 
Two small fixes, one re-fix of a previous fix and five patches sorting
 out hotplug in the bnx2X class of drivers.  The latter is rather
 involved, but necessary because these drivers have started dropping
 lockdep recursion warnings on the hotplug lock because of its
 conversion to a percpu rwsem.
 
 Signed-off-by: James E.J. Bottomley <jejb@linux.vnet.ibm.com>
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Merge tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi

Pull SCSI fixes from James Bottomley:
 "Two small fixes, one re-fix of a previous fix and five patches sorting
  out hotplug in the bnx2X class of drivers. The latter is rather
  involved, but necessary because these drivers have started dropping
  lockdep recursion warnings on the hotplug lock because of its
  conversion to a percpu rwsem"

* tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi:
  scsi: sg: only check for dxfer_len greater than 256M
  scsi: aacraid: reading out of bounds
  scsi: qedf: Limit number of CQs
  scsi: bnx2i: Simplify cpu hotplug code
  scsi: bnx2fc: Simplify CPU hotplug code
  scsi: bnx2i: Prevent recursive cpuhotplug locking
  scsi: bnx2fc: Prevent recursive cpuhotplug locking
  scsi: bnx2fc: Plug CPU hotplug race
This commit is contained in:
Linus Torvalds 2017-08-08 09:38:41 -07:00
commit de70be0ae3
8 changed files with 69 additions and 171 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

7
drivers/scsi/aacraid/aachba.c
View File

@ -3198,10 +3198,11 @@ static int query_disk(struct aac_dev *dev, void __user *arg)
return -EBUSY;
if (copy_from_user(&qd, arg, sizeof (struct aac_query_disk)))
return -EFAULT;
if (qd.cnum == -1)
if (qd.cnum == -1) {
if (qd.id < 0 || qd.id >= dev->maximum_num_containers)
return -EINVAL;
qd.cnum = qd.id;
else if ((qd.bus == -1) && (qd.id == -1) && (qd.lun == -1))
{
} else if ((qd.bus == -1) && (qd.id == -1) && (qd.lun == -1)) {
if (qd.cnum < 0 || qd.cnum >= dev->maximum_num_containers)
return -EINVAL;
qd.instance = dev->scsi_host_ptr->host_no;

68
drivers/scsi/bnx2fc/bnx2fc_fcoe.c
View File

@ -2624,12 +2624,11 @@ static struct fcoe_transport bnx2fc_transport = {
};
/**
* bnx2fc_percpu_thread_create - Create a receive thread for an
* online CPU
* bnx2fc_cpu_online - Create a receive thread for an online CPU
*
* @cpu: cpu index for the online cpu
*/
static void bnx2fc_percpu_thread_create(unsigned int cpu)
static int bnx2fc_cpu_online(unsigned int cpu)
{
struct bnx2fc_percpu_s *p;
struct task_struct *thread;
@ -2639,15 +2638,17 @@ static void bnx2fc_percpu_thread_create(unsigned int cpu)
thread = kthread_create_on_node(bnx2fc_percpu_io_thread,
(void *)p, cpu_to_node(cpu),
"bnx2fc_thread/%d", cpu);
if (IS_ERR(thread))
return PTR_ERR(thread);
/* bind thread to the cpu */
if (likely(!IS_ERR(thread))) {
kthread_bind(thread, cpu);
p->iothread = thread;
wake_up_process(thread);
}
kthread_bind(thread, cpu);
p->iothread = thread;
wake_up_process(thread);
return 0;
}
static void bnx2fc_percpu_thread_destroy(unsigned int cpu)
static int bnx2fc_cpu_offline(unsigned int cpu)
{
struct bnx2fc_percpu_s *p;
struct task_struct *thread;
@ -2661,7 +2662,6 @@ static void bnx2fc_percpu_thread_destroy(unsigned int cpu)
thread = p->iothread;
p->iothread = NULL;
/* Free all work in the list */
list_for_each_entry_safe(work, tmp, &p->work_list, list) {
list_del_init(&work->list);
@ -2673,20 +2673,6 @@ static void bnx2fc_percpu_thread_destroy(unsigned int cpu)
if (thread)
kthread_stop(thread);
}
static int bnx2fc_cpu_online(unsigned int cpu)
{
printk(PFX "CPU %x online: Create Rx thread\n", cpu);
bnx2fc_percpu_thread_create(cpu);
return 0;
}
static int bnx2fc_cpu_dead(unsigned int cpu)
{
printk(PFX "CPU %x offline: Remove Rx thread\n", cpu);
bnx2fc_percpu_thread_destroy(cpu);
return 0;
}
@ -2761,30 +2747,16 @@ static int __init bnx2fc_mod_init(void)
spin_lock_init(&p->fp_work_lock);
}
get_online_cpus();
for_each_online_cpu(cpu)
bnx2fc_percpu_thread_create(cpu);
rc = cpuhp_setup_state_nocalls(CPUHP_AP_ONLINE_DYN,
"scsi/bnx2fc:online",
bnx2fc_cpu_online, NULL);
rc = cpuhp_setup_state(CPUHP_AP_ONLINE_DYN, "scsi/bnx2fc:online",
bnx2fc_cpu_online, bnx2fc_cpu_offline);
if (rc < 0)
goto stop_threads;
goto stop_thread;
bnx2fc_online_state = rc;
cpuhp_setup_state_nocalls(CPUHP_SCSI_BNX2FC_DEAD, "scsi/bnx2fc:dead",
NULL, bnx2fc_cpu_dead);
put_online_cpus();
cnic_register_driver(CNIC_ULP_FCOE, &bnx2fc_cnic_cb);
return 0;
stop_threads:
for_each_online_cpu(cpu)
bnx2fc_percpu_thread_destroy(cpu);
put_online_cpus();
stop_thread:
kthread_stop(l2_thread);
free_wq:
destroy_workqueue(bnx2fc_wq);
@ -2803,7 +2775,6 @@ static void __exit bnx2fc_mod_exit(void)
struct fcoe_percpu_s *bg;
struct task_struct *l2_thread;
struct sk_buff *skb;
unsigned int cpu = 0;
/*
* NOTE: Since cnic calls register_driver routine rtnl_lock,
@ -2844,16 +2815,7 @@ static void __exit bnx2fc_mod_exit(void)
if (l2_thread)
kthread_stop(l2_thread);
get_online_cpus();
/* Destroy per cpu threads */
for_each_online_cpu(cpu) {
bnx2fc_percpu_thread_destroy(cpu);
}
cpuhp_remove_state_nocalls(bnx2fc_online_state);
cpuhp_remove_state_nocalls(CPUHP_SCSI_BNX2FC_DEAD);
put_online_cpus();
cpuhp_remove_state(bnx2fc_online_state);
destroy_workqueue(bnx2fc_wq);
/*

45
drivers/scsi/bnx2fc/bnx2fc_hwi.c
View File

@ -1008,6 +1008,28 @@ static struct bnx2fc_work *bnx2fc_alloc_work(struct bnx2fc_rport *tgt, u16 wqe)
return work;
}
/* Pending work request completion */
static void bnx2fc_pending_work(struct bnx2fc_rport *tgt, unsigned int wqe)
{
unsigned int cpu = wqe % num_possible_cpus();
struct bnx2fc_percpu_s *fps;
struct bnx2fc_work *work;
fps = &per_cpu(bnx2fc_percpu, cpu);
spin_lock_bh(&fps->fp_work_lock);
if (fps->iothread) {
work = bnx2fc_alloc_work(tgt, wqe);
if (work) {
list_add_tail(&work->list, &fps->work_list);
wake_up_process(fps->iothread);
spin_unlock_bh(&fps->fp_work_lock);
return;
}
}
spin_unlock_bh(&fps->fp_work_lock);
bnx2fc_process_cq_compl(tgt, wqe);
}
int bnx2fc_process_new_cqes(struct bnx2fc_rport *tgt)
{
struct fcoe_cqe *cq;
@ -1042,28 +1064,7 @@ int bnx2fc_process_new_cqes(struct bnx2fc_rport *tgt)
/* Unsolicited event notification */
bnx2fc_process_unsol_compl(tgt, wqe);
} else {
/* Pending work request completion */
struct bnx2fc_work *work = NULL;
struct bnx2fc_percpu_s *fps = NULL;
unsigned int cpu = wqe % num_possible_cpus();
fps = &per_cpu(bnx2fc_percpu, cpu);
spin_lock_bh(&fps->fp_work_lock);
if (unlikely(!fps->iothread))
goto unlock;
work = bnx2fc_alloc_work(tgt, wqe);
if (work)
list_add_tail(&work->list,
&fps->work_list);
unlock:
spin_unlock_bh(&fps->fp_work_lock);
/* Pending work request completion */
if (fps->iothread && work)
wake_up_process(fps->iothread);
else
bnx2fc_process_cq_compl(tgt, wqe);
bnx2fc_pending_work(tgt, wqe);
num_free_sqes++;
}
cqe++;

64
drivers/scsi/bnx2i/bnx2i_init.c
View File

@ -404,12 +404,11 @@ int bnx2i_get_stats(void *handle)
/**
* bnx2i_percpu_thread_create - Create a receive thread for an
* online CPU
* bnx2i_cpu_online - Create a receive thread for an online CPU
*
* @cpu: cpu index for the online cpu
*/
static void bnx2i_percpu_thread_create(unsigned int cpu)
static int bnx2i_cpu_online(unsigned int cpu)
{
struct bnx2i_percpu_s *p;
struct task_struct *thread;
@ -419,16 +418,17 @@ static void bnx2i_percpu_thread_create(unsigned int cpu)
thread = kthread_create_on_node(bnx2i_percpu_io_thread, (void *)p,
cpu_to_node(cpu),
"bnx2i_thread/%d", cpu);
if (IS_ERR(thread))
return PTR_ERR(thread);
/* bind thread to the cpu */
if (likely(!IS_ERR(thread))) {
kthread_bind(thread, cpu);
p->iothread = thread;
wake_up_process(thread);
}
kthread_bind(thread, cpu);
p->iothread = thread;
wake_up_process(thread);
return 0;
}
static void bnx2i_percpu_thread_destroy(unsigned int cpu)
static int bnx2i_cpu_offline(unsigned int cpu)
{
struct bnx2i_percpu_s *p;
struct task_struct *thread;
@ -451,19 +451,6 @@ static void bnx2i_percpu_thread_destroy(unsigned int cpu)
spin_unlock_bh(&p->p_work_lock);
if (thread)
kthread_stop(thread);
}
static int bnx2i_cpu_online(unsigned int cpu)
{
pr_info("bnx2i: CPU %x online: Create Rx thread\n", cpu);
bnx2i_percpu_thread_create(cpu);
return 0;
}
static int bnx2i_cpu_dead(unsigned int cpu)
{
pr_info("CPU %x offline: Remove Rx thread\n", cpu);
bnx2i_percpu_thread_destroy(cpu);
return 0;
}
@ -511,27 +498,14 @@ static int __init bnx2i_mod_init(void)
p->iothread = NULL;
}
get_online_cpus();
for_each_online_cpu(cpu)
bnx2i_percpu_thread_create(cpu);
err = cpuhp_setup_state_nocalls(CPUHP_AP_ONLINE_DYN,
"scsi/bnx2i:online",
bnx2i_cpu_online, NULL);
err = cpuhp_setup_state(CPUHP_AP_ONLINE_DYN, "scsi/bnx2i:online",
bnx2i_cpu_online, bnx2i_cpu_offline);
if (err < 0)
goto remove_threads;
goto unreg_driver;
bnx2i_online_state = err;
cpuhp_setup_state_nocalls(CPUHP_SCSI_BNX2I_DEAD, "scsi/bnx2i:dead",
NULL, bnx2i_cpu_dead);
put_online_cpus();
return 0;
remove_threads:
for_each_online_cpu(cpu)
bnx2i_percpu_thread_destroy(cpu);
put_online_cpus();
unreg_driver:
cnic_unregister_driver(CNIC_ULP_ISCSI);
unreg_xport:
iscsi_unregister_transport(&bnx2i_iscsi_transport);
@ -551,7 +525,6 @@ out:
static void __exit bnx2i_mod_exit(void)
{
struct bnx2i_hba *hba;
unsigned cpu = 0;
mutex_lock(&bnx2i_dev_lock);
while (!list_empty(&adapter_list)) {
@ -569,14 +542,7 @@ static void __exit bnx2i_mod_exit(void)
}
mutex_unlock(&bnx2i_dev_lock);
get_online_cpus();
for_each_online_cpu(cpu)
bnx2i_percpu_thread_destroy(cpu);
cpuhp_remove_state_nocalls(bnx2i_online_state);
cpuhp_remove_state_nocalls(CPUHP_SCSI_BNX2I_DEAD);
put_online_cpus();
cpuhp_remove_state(bnx2i_online_state);
iscsi_unregister_transport(&bnx2i_iscsi_transport);
cnic_unregister_driver(CNIC_ULP_ISCSI);

3
drivers/scsi/qedf/qedf.h
View File

@ -528,7 +528,8 @@ struct fip_vlan {
#define QEDF_WRITE (1 << 0)
#define MAX_FIBRE_LUNS 0xffffffff
#define QEDF_MAX_NUM_CQS 8
#define MIN_NUM_CPUS_MSIX(x) min_t(u32, x->dev_info.num_cqs, \
num_online_cpus())
/*
* PCI function probe defines

20
drivers/scsi/qedf/qedf_main.c
View File

@ -2760,11 +2760,9 @@ static int qedf_set_fcoe_pf_param(struct qedf_ctx *qedf)
* we allocation is the minimum off:
*
* Number of CPUs
* Number of MSI-X vectors
* Max number allocated in hardware (QEDF_MAX_NUM_CQS)
* Number allocated by qed for our PCI function
*/
qedf->num_queues = min((unsigned int)QEDF_MAX_NUM_CQS,
num_online_cpus());
qedf->num_queues = MIN_NUM_CPUS_MSIX(qedf);
QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_DISC, "Number of CQs is %d.\n",
qedf->num_queues);
@ -2962,6 +2960,13 @@ static int __qedf_probe(struct pci_dev *pdev, int mode)
goto err1;
}
/* Learn information crucial for qedf to progress */
rc = qed_ops->fill_dev_info(qedf->cdev, &qedf->dev_info);
if (rc) {
QEDF_ERR(&(qedf->dbg_ctx), "Failed to dev info.\n");
goto err1;
}
/* queue allocation code should come here
* order should be
* slowpath_start
@ -2977,13 +2982,6 @@ static int __qedf_probe(struct pci_dev *pdev, int mode)
}
qed_ops->common->update_pf_params(qedf->cdev, &qedf->pf_params);
/* Learn information crucial for qedf to progress */
rc = qed_ops->fill_dev_info(qedf->cdev, &qedf->dev_info);
if (rc) {
QEDF_ERR(&(qedf->dbg_ctx), "Failed to dev info.\n");
goto err1;
}
/* Record BDQ producer doorbell addresses */
qedf->bdq_primary_prod = qedf->dev_info.primary_dbq_rq_addr;
qedf->bdq_secondary_prod = qedf->dev_info.secondary_bdq_rq_addr;

31
drivers/scsi/sg.c
View File

@ -751,35 +751,6 @@ sg_new_write(Sg_fd *sfp, struct file *file, const char __user *buf,
return count;
}
static bool sg_is_valid_dxfer(sg_io_hdr_t *hp)
{
switch (hp->dxfer_direction) {
case SG_DXFER_NONE:
if (hp->dxferp || hp->dxfer_len > 0)
return false;
return true;
case SG_DXFER_FROM_DEV:
/*
* for SG_DXFER_FROM_DEV we always set dxfer_len to > 0. dxferp
* can either be NULL or != NULL so there's no point in checking
* it either. So just return true.
*/
return true;
case SG_DXFER_TO_DEV:
case SG_DXFER_TO_FROM_DEV:
if (!hp->dxferp || hp->dxfer_len == 0)
return false;
return true;
case SG_DXFER_UNKNOWN:
if ((!hp->dxferp && hp->dxfer_len) ||
(hp->dxferp && hp->dxfer_len == 0))
return false;
return true;
default:
return false;
}
}
static int
sg_common_write(Sg_fd * sfp, Sg_request * srp,
unsigned char *cmnd, int timeout, int blocking)
@ -800,7 +771,7 @@ sg_common_write(Sg_fd * sfp, Sg_request * srp,
"sg_common_write: scsi opcode=0x%02x, cmd_size=%d\n",
(int) cmnd[0], (int) hp->cmd_len));
if (!sg_is_valid_dxfer(hp))
if (hp->dxfer_len >= SZ_256M)
return -EINVAL;
k = sg_start_req(srp, cmnd);

2
include/linux/cpuhotplug.h
View File

@ -39,8 +39,6 @@ enum cpuhp_state {
CPUHP_PCI_XGENE_DEAD,
CPUHP_IOMMU_INTEL_DEAD,
CPUHP_LUSTRE_CFS_DEAD,
CPUHP_SCSI_BNX2FC_DEAD,
CPUHP_SCSI_BNX2I_DEAD,
CPUHP_WORKQUEUE_PREP,
CPUHP_POWER_NUMA_PREPARE,
CPUHP_HRTIMERS_PREPARE,