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Date: Thu, 11 Jul 2013 17:05:50 +0800
From: Ming Lei <ming.lei@...onical.com>
To: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc: linux-usb@...r.kernel.org, Oliver Neukum <oliver@...kum.org>,
Alan Stern <stern@...land.harvard.edu>,
linux-input@...r.kernel.org, linux-bluetooth@...r.kernel.org,
netdev@...r.kernel.org, linux-wireless@...r.kernel.org,
linux-media@...r.kernel.org, alsa-devel@...a-project.org,
Ming Lei <ming.lei@...onical.com>
Subject: [PATCH 27/50] USBNET: hso: spin_lock in complete() cleanup
Complete() will be run with interrupt enabled, so change to
spin_lock_irqsave().
Cc: netdev@...r.kernel.org
Signed-off-by: Ming Lei <ming.lei@...onical.com>
---
drivers/net/usb/hso.c | 38 ++++++++++++++++++++++----------------
1 file changed, 22 insertions(+), 16 deletions(-)
diff --git a/drivers/net/usb/hso.c b/drivers/net/usb/hso.c
index cba1d46..c865441 100644
--- a/drivers/net/usb/hso.c
+++ b/drivers/net/usb/hso.c
@@ -1008,6 +1008,7 @@ static void read_bulk_callback(struct urb *urb)
struct net_device *net;
int result;
int status = urb->status;
+ unsigned long flags;
/* is al ok? (Filip: Who's Al ?) */
if (status) {
@@ -1036,11 +1037,11 @@ static void read_bulk_callback(struct urb *urb)
if (urb->actual_length) {
/* Handle the IP stream, add header and push it onto network
* stack if the packet is complete. */
- spin_lock(&odev->net_lock);
+ spin_lock_irqsave(&odev->net_lock, flags);
packetizeRx(odev, urb->transfer_buffer, urb->actual_length,
(urb->transfer_buffer_length >
urb->actual_length) ? 1 : 0);
- spin_unlock(&odev->net_lock);
+ spin_unlock_irqrestore(&odev->net_lock, flags);
}
/* We are done with this URB, resubmit it. Prep the USB to wait for
@@ -1201,6 +1202,7 @@ static void hso_std_serial_read_bulk_callback(struct urb *urb)
{
struct hso_serial *serial = urb->context;
int status = urb->status;
+ unsigned long flags;
/* sanity check */
if (!serial) {
@@ -1223,17 +1225,17 @@ static void hso_std_serial_read_bulk_callback(struct urb *urb)
if (serial->parent->port_spec & HSO_INFO_CRC_BUG)
fix_crc_bug(urb, serial->in_endp->wMaxPacketSize);
/* Valid data, handle RX data */
- spin_lock(&serial->serial_lock);
+ spin_lock_irqsave(&serial->serial_lock, flags);
serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 1;
put_rxbuf_data_and_resubmit_bulk_urb(serial);
- spin_unlock(&serial->serial_lock);
+ spin_unlock_irqrestore(&serial->serial_lock, flags);
} else if (status == -ENOENT || status == -ECONNRESET) {
/* Unlinked - check for throttled port. */
D2("Port %d, successfully unlinked urb", serial->minor);
- spin_lock(&serial->serial_lock);
+ spin_lock_irqsave(&serial->serial_lock, flags);
serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 0;
hso_resubmit_rx_bulk_urb(serial, urb);
- spin_unlock(&serial->serial_lock);
+ spin_unlock_irqrestore(&serial->serial_lock, flags);
} else {
D2("Port %d, status = %d for read urb", serial->minor, status);
return;
@@ -1510,12 +1512,13 @@ static void tiocmget_intr_callback(struct urb *urb)
DUMP(serial_state_notification,
sizeof(struct hso_serial_state_notification));
} else {
+ unsigned long flags;
UART_state_bitmap = le16_to_cpu(serial_state_notification->
UART_state_bitmap);
prev_UART_state_bitmap = tiocmget->prev_UART_state_bitmap;
icount = &tiocmget->icount;
- spin_lock(&serial->serial_lock);
+ spin_lock_irqsave(&serial->serial_lock, flags);
if ((UART_state_bitmap & B_OVERRUN) !=
(prev_UART_state_bitmap & B_OVERRUN))
icount->parity++;
@@ -1538,7 +1541,7 @@ static void tiocmget_intr_callback(struct urb *urb)
(prev_UART_state_bitmap & B_RX_CARRIER))
icount->dcd++;
tiocmget->prev_UART_state_bitmap = UART_state_bitmap;
- spin_unlock(&serial->serial_lock);
+ spin_unlock_irqrestore(&serial->serial_lock, flags);
tiocmget->intr_completed = 1;
wake_up_interruptible(&tiocmget->waitq);
}
@@ -1883,8 +1886,9 @@ static void intr_callback(struct urb *urb)
serial = get_serial_by_shared_int_and_type(shared_int,
(1 << i));
if (serial != NULL) {
+ unsigned long flags;
D1("Pending read interrupt on port %d\n", i);
- spin_lock(&serial->serial_lock);
+ spin_lock_irqsave(&serial->serial_lock, flags);
if (serial->rx_state == RX_IDLE &&
serial->port.count > 0) {
/* Setup and send a ctrl req read on
@@ -1898,7 +1902,7 @@ static void intr_callback(struct urb *urb)
D1("Already a read pending on "
"port %d or port not open\n", i);
}
- spin_unlock(&serial->serial_lock);
+ spin_unlock_irqrestore(&serial->serial_lock, flags);
}
}
}
@@ -1925,6 +1929,7 @@ static void hso_std_serial_write_bulk_callback(struct urb *urb)
{
struct hso_serial *serial = urb->context;
int status = urb->status;
+ unsigned long flags;
/* sanity check */
if (!serial) {
@@ -1932,9 +1937,9 @@ static void hso_std_serial_write_bulk_callback(struct urb *urb)
return;
}
- spin_lock(&serial->serial_lock);
+ spin_lock_irqsave(&serial->serial_lock, flags);
serial->tx_urb_used = 0;
- spin_unlock(&serial->serial_lock);
+ spin_unlock_irqrestore(&serial->serial_lock, flags);
if (status) {
handle_usb_error(status, __func__, serial->parent);
return;
@@ -1976,14 +1981,15 @@ static void ctrl_callback(struct urb *urb)
struct hso_serial *serial = urb->context;
struct usb_ctrlrequest *req;
int status = urb->status;
+ unsigned long flags;
/* sanity check */
if (!serial)
return;
- spin_lock(&serial->serial_lock);
+ spin_lock_irqsave(&serial->serial_lock, flags);
serial->tx_urb_used = 0;
- spin_unlock(&serial->serial_lock);
+ spin_unlock_irqrestore(&serial->serial_lock, flags);
if (status) {
handle_usb_error(status, __func__, serial->parent);
return;
@@ -1999,9 +2005,9 @@ static void ctrl_callback(struct urb *urb)
(USB_DIR_IN | USB_TYPE_OPTION_VENDOR | USB_RECIP_INTERFACE)) {
/* response to a read command */
serial->rx_urb_filled[0] = 1;
- spin_lock(&serial->serial_lock);
+ spin_lock_irqsave(&serial->serial_lock, flags);
put_rxbuf_data_and_resubmit_ctrl_urb(serial);
- spin_unlock(&serial->serial_lock);
+ spin_unlock_irqrestore(&serial->serial_lock, flags);
} else {
hso_put_activity(serial->parent);
tty_port_tty_wakeup(&serial->port);
--
1.7.9.5
--
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