Atsushi Nemoto 1e9a51dca1 [PATCH] SPI: alternative fix for spi_busnum_to_master ... If a SPI master device exists, udev (udevtrigger) causes kernel crash, due to wrong kobj pointer in kobject_uevent_env(). This problem was not in 2.6.19. The backtrace (on MIPS) was: [<8024db6c>] kobject_uevent_env+0x54c/0x5e8 [<802a8264>] store_uevent+0x1c/0x3c (in drivers/class.c) [<801cb14c>] subsys_attr_store+0x2c/0x50 [<801cb80c>] flush_write_buffer+0x38/0x5c [<801cb900>] sysfs_write_file+0xd0/0x190 [<80181444>] vfs_write+0xc4/0x1a0 [<80181cdc>] sys_write+0x54/0xa0 [<8010dae4>] stack_done+0x20/0x3c flush_write_buffer() passes kobject of spi_master_class.subsys to subsys_addr_store(), then subsys_addr_store() passes a pointer to a struct subsystem to store_uevent() which expects a pointer to a struct class_device. The problem seems subsys_attr_store() called instead of class_device_attr_store(). This mismatch was caused by commit 3bd0f69435, which overrides kset of master class. This made spi_master_class.subsys.kset.ktype NULL so subsys_sysfs_ops is used instead of class_dev_sysfs_ops. The commit was to fix spi_busnum_to_master(). Here is a patch fixes this function in other way, just searching children list of class_device. Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp> Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		2007-01-26 13:50:58 -08:00
..
Kconfig	Fix misc Kconfig typos	2006-11-30 05:22:59 +01:00
Makefile
pxa2xx_spi.c	[PATCH] spi: fix error setting the spi mode in pxa2xx_spi.c	2007-01-26 13:50:57 -08:00
spi_bitbang.c	[PATCH] slab: remove SLAB_KERNEL	2006-12-07 08:39:24 -08:00
spi_butterfly.c	[PATCH] spi: check platform_device_register_simple() error	2006-12-07 08:39:42 -08:00
spi_mpc83xx.c	[PATCH] SPI: define null tx_buf to mean "shift out zeroes"	2006-12-30 10:56:42 -08:00
spi_s3c24xx_gpio.c	[PATCH] spi_s3c24xx_gpio: use right header	2006-12-30 10:56:43 -08:00
spi_s3c24xx.c	[PATCH] S3C24XX: fix passing spi chipselect to select routine	2007-01-26 13:50:57 -08:00
spi.c	[PATCH] SPI: alternative fix for spi_busnum_to_master	2007-01-26 13:50:58 -08:00