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  1. 19 5月, 2008 32 次提交
  3. 23 6月, 2008 2 次提交
  5. 16 6月, 2008 1 次提交
  7. 09 6月, 2008 1 次提交
  9. 06 6月, 2008 1 次提交
    • J
      sound: emu10k1 - fix system hang with Audigy2 ZS Notebook PCMCIA card · 868e15db
      由 Jaroslav Franek 提交于 
      When the Linux kernel is compiled with CONFIG_DEBUG_SHIRQ=y,
the Soundblaster Audigy2 ZS Notebook PCMCIA card causes the
system hang during boot (udev stage) or when the card is hot-plug.
The CONFIG_DEBUG_SHIRQ flag is by default 'y' with all Fedora
kernels since 2.6.23. The problem was reported as
https://bugzilla.redhat.com/show_bug.cgi?id=326411

The issue was hunted down to the snd_emu10k1_create() routine:

/* pseudo-code */
snd_emu10k1_create(...) {
	...
	request_irq(... IRQF_SHARED ...) {
		register the irq handler
		#ifdef CONFIG_DEBUG_SHIRQ
		call the irq handler: snd_emu10k1_interrupt() {
			poll I/O port   // <---- !! system hangs
			...
		}
		#endif
	}
	...
	snd_emu10k1_cardbus_init(...) {
		initialize I/O ports
	}
	...
}

The early access to I/O port in the interrupt handler causes
the freeze. Obviously it is necessary to init the I/O ports
before accessing them. This patch moves the registration of
the irq handler after the initialization of the I/O ports.
Signed-off-by: NJaroslav Franek <jarin.franek@post.cz>
Acked-by: NJames Courtier-Dutton <James@superbug.co.uk>
Signed-off-by: NTakashi Iwai <tiwai@suse.de>
      868e15db
  11. 04 6月, 2008 1 次提交
  13. 03 6月, 2008 1 次提交
  15. 30 5月, 2008 1 次提交