Aristeu Sergio Rozanski Filho 03929c76f3 [PATCH] ppc32: cpm_uart: fix xchar sending ... while using SCC as uart and as serial console at same time I got this: [ 138.214258] Oops: kernel access of bad area, sig: 11 [#1] [ 138.218832] PREEMPT [ 138.221021] NIP: C0105C48 LR: C0105E60 SP: C03D5D10 REGS: c03d5c60 TRAP: 0300 Not tainted [ 138.229280] MSR: 00009032 EE: 1 PR: 0 FP: 0 ME: 1 IR/DR: 11 [ 138.234713] DAR: 00000000, DSISR: C0000000 [ 138.238745] TASK = c0349420[693] 'sh' THREAD: c03d4000 [ 138.243754] Last syscall: 6 [ 138.246402] GPR00: FEFFFFFF C03D5D10 C0349420 C01FB094 00000011 00000000 C1ECFBBC C01F24B0 [ 138.254602] GPR08: FF002820 00000000 FF0028C0 00000000 19133615 A0CBCD5E 02000300 00000000 [ 138.262804] GPR16: 00000000 01FF9E4C 00000000 7FA9A770 00000000 00000000 1003E2A8 00000000 [ 138.271003] GPR24: 100562F4 7F9B6EF4 C0210000 C02A5338 C01FB094 00000000 C01FB094 C1F14574 [ 138.279376] NIP [c0105c48] cpm_uart_tx_pump+0x4c/0x22c [ 138.284419] LR [c0105e60] cpm_uart_start_tx+0x38/0xb0 [ 138.289361] Call trace: [ 138.291762] [c0105e60] cpm_uart_start_tx+0x38/0xb0 [ 138.296547] [c010277c] uart_send_xchar+0x88/0x118 [ 138.301244] [c01029a0] uart_unthrottle+0x6c/0x138 [ 138.305942] [c00ece10] check_unthrottle+0x60/0x64 [ 138.310641] [c00ecec4] reset_buffer_flags+0xb0/0x138 [ 138.315595] [c00ecf64] n_tty_flush_buffer+0x18/0x78 [ 138.320465] [c00e81b0] tty_ldisc_flush+0x64/0x7c [ 138.325078] [c010410c] uart_close+0xf0/0x2c8 [ 138.329348] [c00e9c48] release_dev+0x724/0x8d4 [ 138.333790] [c00e9e18] tty_release+0x20/0x3c [ 138.338061] [c006e544] __fput+0x178/0x1e0 [ 138.342076] [c006c43c] filp_close+0x54/0xac [ 138.346261] [c0002d90] ret_from_syscall+0x0/0x44 [ 138.352386] note: sh[693] exited with preempt_count 2 a easy way to reproduce it is log into the system using ssh and do: cat >/dev/ttyCPM0 then, switch to minicom and write some stuff on it back to ssh, a control C produce the oops this happens because uart_close calls uart_shutdown which frees xmit.buf, currently used by xchar sending in cpm_uart_tx_pump(), which seems wrong. the attached patch fixes the oops and also fixes xchar sending. Signed-off-by: Paul Mackerras <paulus@samba.org>		2006-01-09 15:44:26 +11:00
..
acorn	[PATCH] I2C: Remove .owner setting from i2c_driver as it's no longer needed	2006-01-05 22:16:25 -08:00
acpi	[ACPI] remove Kconfig "default y" for laptop drivers	2006-01-07 05:11:08 -05:00
amba	[ARM] Move AMBA bus code to drivers/amba/	2006-01-07 14:54:15 +00:00
atm	[PATCH] drivers/atm/adummy.c NULL noise removal	2005-12-15 10:04:31 -08:00
base	[PATCH] memhotplug: register_memory should be global	2006-01-06 08:33:22 -08:00
block	[PATCH] powerpc: Remove device_node addrs/n_addr	2006-01-09 14:53:55 +11:00
bluetooth	[PATCH] pcmcia: add some IDs for ide-cs and dtl1_cs	2006-01-06 00:31:07 +01:00
cdrom	[BLOCK] add @uptodate to end_that_request_last() and @error to rq_end_io_fn()	2006-01-06 09:49:03 +01:00
char	[PATCH] powerpc/8xx: Fix m8xx_wdt issues	2006-01-09 14:52:01 +11:00
connector	[PATCH] Add timestamp field to process events	2005-12-12 08:57:42 -08:00
cpufreq	[CPUFREQ] CPU frequency display in /proc/cpuinfo	2005-12-06 19:35:11 -08:00
crypto
dio
eisa
fc4	[SPARC]: introduce a SPARC Kconfig symbol	2005-12-22 23:09:54 -08:00
firmware	[PATCH] dell_rbu: NULL noise removal	2005-12-15 10:04:30 -08:00
hwmon	[PATCH] hwmon: it87 use u8 for vrm	2006-01-05 22:16:26 -08:00
i2c	[PATCH] powerpc: Unify udbg (#2)	2006-01-09 14:49:54 +11:00
ide	[PATCH] powerpc: Experimental support for new G5 Macs (#2)	2006-01-09 15:03:17 +11:00
ieee1394	[PATCH] don't freeze firewire on suspend.	2006-01-06 08:33:43 -08:00
infiniband	Merge git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-2.6	2006-01-04 18:44:12 -08:00
input	Merge git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input	2006-01-07 11:29:51 -08:00
isdn	[PATCH] pcmcia: unify attach, EVENT_CARD_INSERTION handlers into one probe callback	2006-01-06 00:03:24 +01:00
macintosh	[PATCH] via-pmu: compile without Power Management support	2006-01-09 15:05:51 +11:00
mca
md	[PATCH] md: allow sync-speed to be controlled per-device	2006-01-06 08:34:10 -08:00
media	Merge master.kernel.org:/pub/scm/linux/kernel/git/gregkh/i2c-2.6	2006-01-06 15:25:08 -08:00
message	Merge branch 'post-2.6.15' of git://brick.kernel.dk/data/git/linux-2.6-block	2006-01-06 09:01:25 -08:00
mfd	[PATCH] input: fix ucb1x00-ts breakage after conversion to dynamic input_dev allocation	2005-12-12 08:57:45 -08:00
misc	Input: ibmasm - convert to dynamic input_dev allocation	2006-01-07 11:35:05 -05:00
mmc	Merge master.kernel.org:/home/rmk/linux-2.6-arm	2006-01-07 10:45:22 -08:00
mtd	[ARM] Move asm/hardware/clock.h to linux/clk.h	2006-01-07 16:15:52 +00:00
net	[PATCH] parport: include fixes	2006-01-06 08:33:58 -08:00
nubus
oprofile
parisc
parport	[PATCH] simplify PARPORT_PC_PCMCIA dependencies	2006-01-06 08:33:58 -08:00
pci	Merge git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-2.6	2006-01-04 18:44:12 -08:00
pcmcia	Merge with Linus' kernel.	2006-01-07 14:40:05 +00:00
pnp	[PATCH] x86: Fixed pnp bios limits	2006-01-06 08:33:35 -08:00
rapidio
s390	Merge branch 'post-2.6.15' of git://brick.kernel.dk/data/git/linux-2.6-block	2006-01-06 09:01:25 -08:00
sbus	[PATCH] sbus/char/uctrl: missing prototypes and NULL noise removal	2005-12-15 10:01:28 -08:00
scsi	[PATCH] powerpc: Remove device_node addrs/n_addr	2006-01-09 14:53:55 +11:00
serial	[PATCH] ppc32: cpm_uart: fix xchar sending	2006-01-09 15:44:26 +11:00
sh
sn
tc
telephony	[PATCH] pcmcia: unify attach, EVENT_CARD_INSERTION handlers into one probe callback	2006-01-06 00:03:24 +01:00
usb	Merge git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input	2006-01-07 11:29:51 -08:00
video	[PATCH] powerpc: Remove device_node addrs/n_addr	2006-01-09 14:53:55 +11:00
w1	Merge git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-2.6	2006-01-04 18:44:12 -08:00
zorro
Kconfig
Makefile	[ARM] Move AMBA bus code to drivers/amba/	2006-01-07 14:54:15 +00:00