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Subject[PATCH 2/2] staging: usbip: replace the interrupt safe spinlocks with common ones.
Date

Signed-off-by: Harvey Yang <harvey.huawei.yang@gmail.com>
---
drivers/staging/usbip/vhci_hcd.c | 76 ++++++++++++++++----------------------
drivers/staging/usbip/vhci_rx.c | 10 ++---
drivers/staging/usbip/vhci_tx.c | 14 +++----
3 files changed, 42 insertions(+), 58 deletions(-)

diff --git a/drivers/staging/usbip/vhci_hcd.c b/drivers/staging/usbip/vhci_hcd.c
index c3aa219..216648d 100644
--- a/drivers/staging/usbip/vhci_hcd.c
+++ b/drivers/staging/usbip/vhci_hcd.c
@@ -121,11 +121,9 @@ static void dump_port_status_diff(u32 prev_status, u32 new_status)

void rh_port_connect(int rhport, enum usb_device_speed speed)
{
- unsigned long flags;
-
usbip_dbg_vhci_rh("rh_port_connect %d\n", rhport);

- spin_lock_irqsave(&the_controller->lock, flags);
+ spin_lock(&the_controller->lock);

the_controller->port_status[rhport] |= USB_PORT_STAT_CONNECTION
| (1 << USB_PORT_FEAT_C_CONNECTION);
@@ -141,24 +139,22 @@ void rh_port_connect(int rhport, enum usb_device_speed speed)
break;
}

- spin_unlock_irqrestore(&the_controller->lock, flags);
+ spin_unlock(&the_controller->lock);

usb_hcd_poll_rh_status(vhci_to_hcd(the_controller));
}

static void rh_port_disconnect(int rhport)
{
- unsigned long flags;
-
usbip_dbg_vhci_rh("rh_port_disconnect %d\n", rhport);

- spin_lock_irqsave(&the_controller->lock, flags);
+ spin_lock(&the_controller->lock);

the_controller->port_status[rhport] &= ~USB_PORT_STAT_CONNECTION;
the_controller->port_status[rhport] |=
(1 << USB_PORT_FEAT_C_CONNECTION);

- spin_unlock_irqrestore(&the_controller->lock, flags);
+ spin_unlock(&the_controller->lock);
usb_hcd_poll_rh_status(vhci_to_hcd(the_controller));
}

@@ -183,7 +179,6 @@ static void rh_port_disconnect(int rhport)
static int vhci_hub_status(struct usb_hcd *hcd, char *buf)
{
struct vhci_hcd *vhci;
- unsigned long flags;
int retval;
int rhport;
int changed = 0;
@@ -193,7 +188,7 @@ static int vhci_hub_status(struct usb_hcd *hcd, char *buf)

vhci = hcd_to_vhci(hcd);

- spin_lock_irqsave(&vhci->lock, flags);
+ spin_lock(&vhci->lock);
if (!HCD_HW_ACCESSIBLE(hcd)) {
usbip_dbg_vhci_rh("hw accessible flag not on?\n");
goto done;
@@ -216,7 +211,7 @@ static int vhci_hub_status(struct usb_hcd *hcd, char *buf)
usb_hcd_resume_root_hub(hcd);

done:
- spin_unlock_irqrestore(&vhci->lock, flags);
+ spin_unlock(&vhci->lock);
return changed ? retval : 0;
}

@@ -237,7 +232,6 @@ static int vhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
{
struct vhci_hcd *dum;
int retval = 0;
- unsigned long flags;
int rhport;

u32 prev_port_status[VHCI_NPORTS];
@@ -257,7 +251,7 @@ static int vhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,

dum = hcd_to_vhci(hcd);

- spin_lock_irqsave(&dum->lock, flags);
+ spin_lock(&dum->lock);

/* store old status and compare now and old later */
if (usbip_dbg_flag_vhci_rh) {
@@ -410,7 +404,7 @@ static int vhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
}
usbip_dbg_vhci_rh(" bye\n");

- spin_unlock_irqrestore(&dum->lock, flags);
+ spin_unlock(&dum->lock);

return retval;
}
@@ -433,7 +427,6 @@ static void vhci_tx_urb(struct urb *urb)
{
struct vhci_device *vdev = get_vdev(urb->dev);
struct vhci_priv *priv;
- unsigned long flag;

if (!vdev) {
pr_err("could not get virtual device");
@@ -442,11 +435,11 @@ static void vhci_tx_urb(struct urb *urb)

priv = kzalloc(sizeof(struct vhci_priv), GFP_ATOMIC);

- spin_lock_irqsave(&vdev->priv_lock, flag);
+ spin_lock(&vdev->priv_lock);

if (!priv) {
dev_err(&urb->dev->dev, "malloc vhci_priv\n");
- spin_unlock_irqrestore(&vdev->priv_lock, flag);
+ spin_unlock(&vdev->priv_lock);
usbip_event_add(&vdev->ud, VDEV_EVENT_ERROR_MALLOC);
return;
}
@@ -463,7 +456,7 @@ static void vhci_tx_urb(struct urb *urb)
list_add_tail(&priv->list, &vdev->priv_tx);

wake_up(&vdev->waitq_tx);
- spin_unlock_irqrestore(&vdev->priv_lock, flag);
+ spin_unlock(&vdev->priv_lock);
}

static int vhci_urb_enqueue(struct usb_hcd *hcd, struct urb *urb,
@@ -471,7 +464,6 @@ static int vhci_urb_enqueue(struct usb_hcd *hcd, struct urb *urb,
{
struct device *dev = &urb->dev->dev;
int ret = 0;
- unsigned long flags;
struct vhci_device *vdev;

usbip_dbg_vhci_hc("enter, usb_hcd %p urb %p mem_flags %d\n",
@@ -480,11 +472,11 @@ static int vhci_urb_enqueue(struct usb_hcd *hcd, struct urb *urb,
/* patch to usb_sg_init() is in 2.5.60 */
BUG_ON(!urb->transfer_buffer && urb->transfer_buffer_length);

- spin_lock_irqsave(&the_controller->lock, flags);
+ spin_lock(&the_controller->lock);

if (urb->status != -EINPROGRESS) {
dev_err(dev, "URB already unlinked!, status %d\n", urb->status);
- spin_unlock_irqrestore(&the_controller->lock, flags);
+ spin_unlock(&the_controller->lock);
return urb->status;
}

@@ -496,7 +488,7 @@ static int vhci_urb_enqueue(struct usb_hcd *hcd, struct urb *urb,
vdev->ud.status == VDEV_ST_ERROR) {
dev_err(dev, "enqueue for inactive port %d\n", vdev->rhport);
spin_unlock(&vdev->ud.lock);
- spin_unlock_irqrestore(&the_controller->lock, flags);
+ spin_unlock(&the_controller->lock);
return -ENODEV;
}
spin_unlock(&vdev->ud.lock);
@@ -571,14 +563,14 @@ static int vhci_urb_enqueue(struct usb_hcd *hcd, struct urb *urb,

out:
vhci_tx_urb(urb);
- spin_unlock_irqrestore(&the_controller->lock, flags);
+ spin_unlock(&the_controller->lock);

return 0;

no_need_xmit:
usb_hcd_unlink_urb_from_ep(hcd, urb);
no_need_unlink:
- spin_unlock_irqrestore(&the_controller->lock, flags);
+ spin_unlock(&the_controller->lock);
usb_hcd_giveback_urb(vhci_to_hcd(the_controller), urb, urb->status);
return ret;
}
@@ -631,19 +623,18 @@ no_need_unlink:
*/
static int vhci_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status)
{
- unsigned long flags;
struct vhci_priv *priv;
struct vhci_device *vdev;

pr_info("dequeue a urb %p\n", urb);

- spin_lock_irqsave(&the_controller->lock, flags);
+ spin_lock(&the_controller->lock);

priv = urb->hcpriv;
if (!priv) {
/* URB was never linked! or will be soon given back by
* vhci_rx. */
- spin_unlock_irqrestore(&the_controller->lock, flags);
+ spin_unlock(&the_controller->lock);
return 0;
}

@@ -651,7 +642,7 @@ static int vhci_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status)
int ret = 0;
ret = usb_hcd_check_unlink_urb(hcd, urb, status);
if (ret) {
- spin_unlock_irqrestore(&the_controller->lock, flags);
+ spin_unlock(&the_controller->lock);
return ret;
}
}
@@ -661,16 +652,14 @@ static int vhci_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status)

if (!vdev->ud.tcp_socket) {
/* tcp connection is closed */
- unsigned long flags2;
-
- spin_lock_irqsave(&vdev->priv_lock, flags2);
+ spin_lock(&vdev->priv_lock);

pr_info("device %p seems to be disconnected\n", vdev);
list_del(&priv->list);
kfree(priv);
urb->hcpriv = NULL;

- spin_unlock_irqrestore(&vdev->priv_lock, flags2);
+ spin_unlock(&vdev->priv_lock);

/*
* If tcp connection is alive, we have sent CMD_UNLINK.
@@ -681,24 +670,23 @@ static int vhci_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status)

usb_hcd_unlink_urb_from_ep(hcd, urb);

- spin_unlock_irqrestore(&the_controller->lock, flags);
+ spin_unlock(&the_controller->lock);
usb_hcd_giveback_urb(vhci_to_hcd(the_controller), urb,
urb->status);
- spin_lock_irqsave(&the_controller->lock, flags);
+ spin_lock(&the_controller->lock);

} else {
/* tcp connection is alive */
- unsigned long flags2;
struct vhci_unlink *unlink;

- spin_lock_irqsave(&vdev->priv_lock, flags2);
+ spin_lock(&vdev->priv_lock);

/* setup CMD_UNLINK pdu */
unlink = kzalloc(sizeof(struct vhci_unlink), GFP_ATOMIC);
if (!unlink) {
pr_err("malloc vhci_unlink\n");
- spin_unlock_irqrestore(&vdev->priv_lock, flags2);
- spin_unlock_irqrestore(&the_controller->lock, flags);
+ spin_unlock(&vdev->priv_lock);
+ spin_unlock(&the_controller->lock);
usbip_event_add(&vdev->ud, VDEV_EVENT_ERROR_MALLOC);
return -ENOMEM;
}
@@ -716,10 +704,10 @@ static int vhci_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status)
list_add_tail(&unlink->list, &vdev->unlink_tx);
wake_up(&vdev->waitq_tx);

- spin_unlock_irqrestore(&vdev->priv_lock, flags2);
+ spin_unlock(&vdev->priv_lock);
}

- spin_unlock_irqrestore(&the_controller->lock, flags);
+ spin_unlock(&the_controller->lock);

usbip_dbg_vhci_hc("leave\n");
return 0;
@@ -957,9 +945,9 @@ static int vhci_bus_suspend(struct usb_hcd *hcd)

dev_dbg(&hcd->self.root_hub->dev, "%s\n", __func__);

- spin_lock_irq(&vhci->lock);
+ spin_lock(&vhci->lock);
hcd->state = HC_STATE_SUSPENDED;
- spin_unlock_irq(&vhci->lock);
+ spin_unlock(&vhci->lock);

return 0;
}
@@ -971,13 +959,13 @@ static int vhci_bus_resume(struct usb_hcd *hcd)

dev_dbg(&hcd->self.root_hub->dev, "%s\n", __func__);

- spin_lock_irq(&vhci->lock);
+ spin_lock(&vhci->lock);
if (!HCD_HW_ACCESSIBLE(hcd)) {
rc = -ESHUTDOWN;
} else {
hcd->state = HC_STATE_RUNNING;
}
- spin_unlock_irq(&vhci->lock);
+ spin_unlock(&vhci->lock);

return rc;
}
diff --git a/drivers/staging/usbip/vhci_rx.c b/drivers/staging/usbip/vhci_rx.c
index ba5f1c0..faf8e60 100644
--- a/drivers/staging/usbip/vhci_rx.c
+++ b/drivers/staging/usbip/vhci_rx.c
@@ -68,7 +68,6 @@ static void vhci_recv_ret_submit(struct vhci_device *vdev,
{
struct usbip_device *ud = &vdev->ud;
struct urb *urb;
- unsigned long flags;

spin_lock(&vdev->priv_lock);
urb = pickup_urb_and_free_priv(vdev, pdu->base.seqnum);
@@ -101,9 +100,9 @@ static void vhci_recv_ret_submit(struct vhci_device *vdev,

usbip_dbg_vhci_rx("now giveback urb %p\n", urb);

- spin_lock_irqsave(&the_controller->lock, flags);
+ spin_lock(&the_controller->lock);
usb_hcd_unlink_urb_from_ep(vhci_to_hcd(the_controller), urb);
- spin_unlock_irqrestore(&the_controller->lock, flags);
+ spin_unlock(&the_controller->lock);

usb_hcd_giveback_urb(vhci_to_hcd(the_controller), urb, urb->status);

@@ -141,7 +140,6 @@ static void vhci_recv_ret_unlink(struct vhci_device *vdev,
{
struct vhci_unlink *unlink;
struct urb *urb;
- unsigned long flags;

usbip_dump_header(pdu);

@@ -171,9 +169,9 @@ static void vhci_recv_ret_unlink(struct vhci_device *vdev,
urb->status = pdu->u.ret_unlink.status;
pr_info("urb->status %d\n", urb->status);

- spin_lock_irqsave(&the_controller->lock, flags);
+ spin_lock(&the_controller->lock);
usb_hcd_unlink_urb_from_ep(vhci_to_hcd(the_controller), urb);
- spin_unlock_irqrestore(&the_controller->lock, flags);
+ spin_unlock(&the_controller->lock);

usb_hcd_giveback_urb(vhci_to_hcd(the_controller), urb,
urb->status);
diff --git a/drivers/staging/usbip/vhci_tx.c b/drivers/staging/usbip/vhci_tx.c
index b1f0dcd..409fd99 100644
--- a/drivers/staging/usbip/vhci_tx.c
+++ b/drivers/staging/usbip/vhci_tx.c
@@ -46,18 +46,17 @@ static void setup_cmd_submit_pdu(struct usbip_header *pdup, struct urb *urb)

static struct vhci_priv *dequeue_from_priv_tx(struct vhci_device *vdev)
{
- unsigned long flags;
struct vhci_priv *priv, *tmp;

- spin_lock_irqsave(&vdev->priv_lock, flags);
+ spin_lock(&vdev->priv_lock);

list_for_each_entry_safe(priv, tmp, &vdev->priv_tx, list) {
list_move_tail(&priv->list, &vdev->priv_rx);
- spin_unlock_irqrestore(&vdev->priv_lock, flags);
+ spin_unlock(&vdev->priv_lock);
return priv;
}

- spin_unlock_irqrestore(&vdev->priv_lock, flags);
+ spin_unlock(&vdev->priv_lock);

return NULL;
}
@@ -136,18 +135,17 @@ static int vhci_send_cmd_submit(struct vhci_device *vdev)

static struct vhci_unlink *dequeue_from_unlink_tx(struct vhci_device *vdev)
{
- unsigned long flags;
struct vhci_unlink *unlink, *tmp;

- spin_lock_irqsave(&vdev->priv_lock, flags);
+ spin_lock(&vdev->priv_lock);

list_for_each_entry_safe(unlink, tmp, &vdev->unlink_tx, list) {
list_move_tail(&unlink->list, &vdev->unlink_rx);
- spin_unlock_irqrestore(&vdev->priv_lock, flags);
+ spin_unlock(&vdev->priv_lock);
return unlink;
}

- spin_unlock_irqrestore(&vdev->priv_lock, flags);
+ spin_unlock(&vdev->priv_lock);

return NULL;
}
--
1.7.1


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