From: Takashi Iwai Date: Tue, 27 Aug 2013 10:03:01 +0000 (+0200) Subject: ALSA: opti9xx: Fix conflicting driver object name X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=fb615499f0ad28ed74201c1cdfddf9e64e205424;p=linux-beck.git ALSA: opti9xx: Fix conflicting driver object name The recent commit to delay the release of kobject triggered NULL dereferences of opti9xx drivers. The cause is that all snd-opti92x-ad1848, snd-opti92x-cs4231 and snd-opti93x drivers register the PnP card driver with the very same name, and also snd-opti92x-ad1848 and -cs4231 drivers register the ISA driver with the same name, too. When these drivers are built in, quick "register-release-and-re-register" actions occur, and this results in Oops because of the same name is assigned to the kobject. The fix is simply to assign individual names. As a bonus, by using KBUILD_MODNAME, the patch reduces more lines than it adds. The fix is based on the suggestion by Russell King. Reported-and-tested-by: Fengguang Wu Cc: Signed-off-by: Takashi Iwai --- diff --git a/sound/isa/opti9xx/opti92x-ad1848.c b/sound/isa/opti9xx/opti92x-ad1848.c index 103b33373fd4..6effe99bbb9c 100644 --- a/sound/isa/opti9xx/opti92x-ad1848.c +++ b/sound/isa/opti9xx/opti92x-ad1848.c @@ -173,11 +173,7 @@ MODULE_DEVICE_TABLE(pnp_card, snd_opti9xx_pnpids); #endif /* CONFIG_PNP */ -#ifdef OPTi93X -#define DEV_NAME "opti93x" -#else -#define DEV_NAME "opti92x" -#endif +#define DEV_NAME KBUILD_MODNAME static char * snd_opti9xx_names[] = { "unknown", @@ -1167,7 +1163,7 @@ static int snd_opti9xx_pnp_resume(struct pnp_card_link *pcard) static struct pnp_card_driver opti9xx_pnpc_driver = { .flags = PNP_DRIVER_RES_DISABLE, - .name = "opti9xx", + .name = DEV_NAME, .id_table = snd_opti9xx_pnpids, .probe = snd_opti9xx_pnp_probe, .remove = snd_opti9xx_pnp_remove,