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#ifndef DIE_H
#define DIE_H

#include <stdio.h>
#include <stdlib.h>
#include <stdarg.h>
#include <stdbool.h>
#include <string.h>
#include <errno.h>
#include <unistd.h>
#include <syslog.h>

#include "built_in.h"

extern void panic_handler_add(void (*on_panic)(void *arg), void *arg);
extern void call_panic_handlers(void);

static inline void panic(const char *format, ...)  __check_format_printf(1, 2);
static inline void syslog_panic(const char *format,
				...) __check_format_printf(1, 2);
static inline void syslog_maybe(bool cond, int priority,
				const char *format, ...) __check_format_printf(3, 4);

static inline void __noreturn __die_hard(void)
{
	call_panic_handlers();
	exit(EXIT_FAILURE);
}

static inline void __noreturn __die_harder(void)
{
	call_panic_handlers();
	_exit(EXIT_FAILURE);
}

static inline void __noreturn die(void)
{
	__die_hard();
}

static inline void __noreturn _die(void)
{
	__die_harder();
}

static inline void __noreturn panic(const char *format, ...)
{
	va_list vl;

	va_start(vl, format);
	vfprintf(stderr, format, vl);
	va_end(vl);

	die();
}

static inline void __noreturn syslog_panic(const char *format, ...)
{
	va_list vl;

	va_start(vl, format);
	vsyslog(LOG_ERR, format, vl);
	va_end(vl);

	die();
}

static inline void syslog_maybe(bool cond, int priority,
				const char *format, ...)
{
	if (cond) {
		va_list vl;

		va_start(vl, format);
		vsyslog(priority, format, vl);
		va_end(vl);
	}
}

#endif /* DIE_H */
do_unblank_screen+0xd2/0x1a0 vt_ioctl+0x507/0x12a0 tty_ioctl+0x355/0xc30 do_vfs_ioctl+0xa3/0x5e0 SyS_ioctl+0x79/0x90 entry_SYSCALL_64_fastpath+0x13/0x94 - i915 unpin_work workqueue: intel_unpin_work_fn+0x58/0x140 [i915] process_one_work+0x1f1/0x480 worker_thread+0x48/0x4d0 kthread+0x101/0x140 and this patch purely papers over the issue by adding a NULL pointer check and a WARN_ON_ONCE() to avoid the oops that would then generally make the machine unresponsive. Other callers of i915_gem_object_to_ggtt() seem to also check for the returned pointer being NULL and warn about it, so this clearly has happened before in other places. [ Reported it originally to the i915 developers on Jan 8, applying the ugly workaround on my own now after triggering the problem for the second time with no feedback. This is likely to be the same bug reported as https://bugs.freedesktop.org/show_bug.cgi?id=98829 https://bugs.freedesktop.org/show_bug.cgi?id=99134 which has a patch for the underlying problem, but it hasn't gotten to me, so I'm applying the workaround. ] Cc: Daniel Vetter <daniel.vetter@intel.com> Cc: Jani Nikula <jani.nikula@linux.intel.com> Cc: Ville Syrjälä <ville.syrjala@linux.intel.com> Cc: Chris Wilson <chris@chris-wilson.co.uk> Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com> Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com> Cc: Imre Deak <imre.deak@intel.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'sound/pci/echoaudio/indigo_express_dsp.c')