/* * Subject to the GPL, version 2. */ #include "xmalloc.h" struct panic_handler { void *arg; pid_t pid; bool is_enabled; void (*on_panic)(void *arg); struct panic_handler *next; }; static struct panic_handler *panic_handlers; void panic_handler_add(void (*on_panic)(void *arg), void *arg) { struct panic_handler *handler = xmallocz(sizeof(*handler)); handler->arg = arg; handler->pid = getpid(); handler->is_enabled = true; handler->on_panic = on_panic; handler->next = panic_handlers; panic_handlers = handler; }; void call_panic_handlers(void) { struct panic_handler *it; pid_t pid = getpid(); for (it = panic_handlers; it; it = it->next) { if (it->pid == pid && it->is_enabled) { it->is_enabled = false; it->on_panic(it->arg); } } } '/cgit.png' alt='cgit logo'/> index : net-next.git
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authorThomas Gleixner <tglx@linutronix.de>2017-01-31 19:03:21 +0100
committerThomas Gleixner <tglx@linutronix.de>2017-01-31 20:22:18 +0100
commitaaaec6fc755447a1d056765b11b24d8ff2b81366 (patch)
treea7f4167960ee1df86739905b6ccdeb95465bfe5f /sound/drivers/virmidi.c
parent08d85f3ea99f1eeafc4e8507936190e86a16ee8c (diff)
x86/irq: Make irq activate operations symmetric
The recent commit which prevents double activation of interrupts unearthed interesting code in x86. The code (ab)uses irq_domain_activate_irq() to reconfigure an already activated interrupt. That trips over the prevention code now. Fix it by deactivating the interrupt before activating the new configuration. Fixes: 08d85f3ea99f1 "irqdomain: Avoid activating interrupts more than once" Reported-and-tested-by: Mike Galbraith <efault@gmx.de> Reported-and-tested-by: Borislav Petkov <bp@alien8.de> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Andrey Ryabinin <aryabinin@virtuozzo.com> Cc: Marc Zyngier <marc.zyngier@arm.com> Cc: stable@vger.kernel.org Link: http://lkml.kernel.org/r/alpine.DEB.2.20.1701311901580.3457@nanos
Diffstat (limited to 'sound/drivers/virmidi.c')