diff options
| author | Ben Chan <benchan@chromium.org> | 2012-06-12 11:23:32 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2012-06-12 14:37:28 -0700 |
| commit | 0c16ae762990660c4dfd7515e3d46b4249f535f0 (patch) | |
| tree | bdda7295c4b8581482d4b3782166fed45c1e3cf1 /drivers | |
| parent | 592314e9e1c0057bdb75ff00cbd1c51aa06c65e7 (diff) | |
staging: gdm72xx: Simplify spinlock fix for gdm_usb_send_complete
This patch simplifies the previous patch (commit
dd13c86b0dae86efdde98119ffd7348e80719ade) for fixing the spinlock
recursion issue on several call sites of gdm_usb_send_complete.
Signed-off-by: Ben Chan <benchan@chromium.org>
Cc: Sage Ahn <syahn@gctsemi.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/staging/gdm72xx/gdm_usb.c | 26 |
1 files changed, 10 insertions, 16 deletions
diff --git a/drivers/staging/gdm72xx/gdm_usb.c b/drivers/staging/gdm72xx/gdm_usb.c index 646e0ace91ec..89268c785b25 100644 --- a/drivers/staging/gdm72xx/gdm_usb.c +++ b/drivers/staging/gdm72xx/gdm_usb.c @@ -270,21 +270,17 @@ static void release_usb(struct usbwm_dev *udev) } } -static void gdm_usb_send_complete_impl(struct urb *urb, bool need_lock) +static void __gdm_usb_send_complete(struct urb *urb) { struct usb_tx *t = urb->context; struct tx_cxt *tx = t->tx_cxt; u8 *pkt = t->buf; u16 cmd_evt; - unsigned long flags; /* Completion by usb_unlink_urb */ if (urb->status == -ECONNRESET) return; - if (need_lock) - spin_lock_irqsave(&tx->lock, flags); - if (t->callback) t->callback(t->cb_data); @@ -296,19 +292,17 @@ static void gdm_usb_send_complete_impl(struct urb *urb, bool need_lock) put_tx_struct(tx, t); else free_tx_struct(t); - - if (need_lock) - spin_unlock_irqrestore(&tx->lock, flags); } static void gdm_usb_send_complete(struct urb *urb) { - gdm_usb_send_complete_impl(urb, true); -} + struct usb_tx *t = urb->context; + struct tx_cxt *tx = t->tx_cxt; + unsigned long flags; -static void gdm_usb_send_complete_no_lock(struct urb *urb) -{ - gdm_usb_send_complete_impl(urb, false); + spin_lock_irqsave(&tx->lock, flags); + __gdm_usb_send_complete(urb); + spin_unlock_irqrestore(&tx->lock, flags); } static int gdm_usb_send(void *priv_dev, void *data, int len, @@ -423,7 +417,7 @@ out: send_fail: t->callback = NULL; - gdm_usb_send_complete_no_lock(t->urb); + __gdm_usb_send_complete(t->urb); spin_unlock_irqrestore(&tx->lock, flags); return ret; } @@ -552,7 +546,7 @@ static void do_pm_control(struct work_struct *work) if (ret) { t->callback = NULL; - gdm_usb_send_complete_no_lock(t->urb); + __gdm_usb_send_complete(t->urb); } } } @@ -754,7 +748,7 @@ static int k_mode_thread(void *arg) if (ret) { t->callback = NULL; - gdm_usb_send_complete_no_lock(t->urb); + __gdm_usb_send_complete(t->urb); } } |