diff options
Diffstat (limited to 'meta/recipes-kernel/linux/linux-omap-2.6.29/musb/0002-USB-composite-avoid-inconsistent-lock-state.patch')
| -rw-r--r-- | meta/recipes-kernel/linux/linux-omap-2.6.29/musb/0002-USB-composite-avoid-inconsistent-lock-state.patch | 76 |
1 files changed, 76 insertions, 0 deletions
diff --git a/meta/recipes-kernel/linux/linux-omap-2.6.29/musb/0002-USB-composite-avoid-inconsistent-lock-state.patch b/meta/recipes-kernel/linux/linux-omap-2.6.29/musb/0002-USB-composite-avoid-inconsistent-lock-state.patch new file mode 100644 index 0000000000..5cb7bcb065 --- /dev/null +++ b/meta/recipes-kernel/linux/linux-omap-2.6.29/musb/0002-USB-composite-avoid-inconsistent-lock-state.patch @@ -0,0 +1,76 @@ +From 83eb44b1c84f99d9a5c67612bd94b4ed7c43f64c Mon Sep 17 00:00:00 2001 +From: Felipe Balbi <felipe.balbi-xNZwKgViW5gAvxtiuMwx3w@public.gmane.org> +Date: Tue, 24 Mar 2009 17:22:49 -0700 +Subject: [PATCH] USB: composite: avoid inconsistent lock state + +Avoid the following INFO from lock debugging: + +[ 369.126112] ================================= +[ 369.132063] [ INFO: inconsistent lock state ] +[ 369.136457] 2.6.28-maemo1 #1 +[ 369.139387] --------------------------------- +[ 369.143782] inconsistent {hardirq-on-W} -> {in-hardirq-W} usage. +[ 369.149855] swapper/0 [HC1[1]:SC0[0]:HE0:SE1] takes: +[ 369.154890] (&cdev->lock){+-..}, at: [<bf1979f0>] composite_disconnect+0x1c/0] +[ 369.163404] {hardirq-on-W} state was registered at: +[ 369.168348] [<c00788a8>] __lock_acquire+0x5d0/0x7d8 +[ 369.173506] [<c0078b14>] lock_acquire+0x64/0x78 +[ 369.178266] [<c0263a34>] _spin_lock+0x4c/0x80 +[ 369.182905] [<bf19597c>] usb_function_deactivate+0x20/0x70 [g_nokia] +[ 369.189527] [<bf1a0a88>] 0xbf1a0a88 +[ 369.193281] [<bf19f450>] 0xbf19f450 +[ 369.197004] [<bf19fa3c>] 0xbf19fa3c +[ 369.200758] [<bf1a03a0>] 0xbf1a03a0 +[ 369.204481] [<bf19f254>] 0xbf19f254 +[ 369.208204] [<bf1a0158>] 0xbf1a0158 +[ 369.211927] [<bf1a130c>] 0xbf1a130c +[ 369.215650] [<c01c21f0>] usb_gadget_register_driver+0x12c/0x28c +[ 369.221846] [<bf1a06bc>] 0xbf1a06bc +[ 369.225569] [<bf1a06e8>] 0xbf1a06e8 +[ 369.229322] [<c002c2dc>] __exception_text_end+0x64/0x19c +[ 369.234877] [<c0081628>] sys_init_module+0x9c/0x194 +[ 369.240004] [<c002c8e0>] ret_fast_syscall+0x0/0x2c +[ 369.245039] [<ffffffff>] 0xffffffff +[ 369.248793] irq event stamp: 218356 +[ 369.252302] hardirqs last enabled at (218355): [<c003a77c>] omap3_enter_idle+8 +[ 369.260420] hardirqs last disabled at (218356): [<c0264774>] __irq_svc+0x34/0x0 +[ 369.267927] softirqs last enabled at (218348): [<c00585a4>] __do_softirq+0x134 +[ 369.275892] softirqs last disabled at (218335): [<c005899c>] irq_exit+0x60/0xb0 +[ 369.283308] +[ 369.283308] other info that might help us debug this: +[ 369.289930] no locks held by swapper/0. + +Cc: David Brownell <david-b-yBeKhBN/0LDR7s880joybQ@public.gmane.org> +Signed-off-by: Felipe Balbi <felipe.balbi-xNZwKgViW5gAvxtiuMwx3w@public.gmane.org> +Signed-off-by: Greg Kroah-Hartman <gregkh-l3A5Bk7waGM@public.gmane.org> +--- + drivers/usb/gadget/composite.c | 5 +++-- + 1 files changed, 3 insertions(+), 2 deletions(-) + +diff --git a/drivers/usb/gadget/composite.c b/drivers/usb/gadget/composite.c +index 5d11c29..40f1da7 100644 +--- a/drivers/usb/gadget/composite.c ++++ b/drivers/usb/gadget/composite.c +@@ -149,16 +149,17 @@ done: + int usb_function_deactivate(struct usb_function *function) + { + struct usb_composite_dev *cdev = function->config->cdev; ++ unsigned long flags; + int status = 0; + +- spin_lock(&cdev->lock); ++ spin_lock_irqsave(&cdev->lock, flags); + + if (cdev->deactivations == 0) + status = usb_gadget_disconnect(cdev->gadget); + if (status == 0) + cdev->deactivations++; + +- spin_unlock(&cdev->lock); ++ spin_unlock_irqrestore(&cdev->lock, flags); + return status; + } + +-- +1.6.0.4 + |