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
..
cpm_uart	[PATCH] ppc32: cpm_uart: fix xchar sending	2006-01-09 15:44:26 +11:00
jsm	…
8250.c	[SERIAL] Remove _INLINE_	2006-01-04 19:43:24 +00:00
8250.h	[SERIAL] Remove _INLINE_	2006-01-04 19:43:24 +00:00
8250_accent.c	…
8250_acorn.c	…
8250_acpi.c	…
8250_au1x00.c	[SERIAL] Support Au1x00 8250 UARTs using the generic 8250 driver.	2005-11-06 09:07:03 +00:00
8250_boca.c	…
8250_early.c	[SERIAL] 8250_early.c passing 0 instead of NULL	2005-11-03 21:07:37 +00:00
8250_fourport.c	…
8250_gsc.c	…
8250_hp300.c	…
8250_hub6.c	…
8250_mca.c	…
8250_pci.c	[SERIAL] 8520_pci: build fix	2006-01-05 10:55:26 +00:00
8250_pnp.c	[SERIAL] Claim Wacom tablet device on HP tc1100 tablet	2005-11-12 22:06:31 +00:00
21285.c	…
68328serial.c	[PATCH] move pm_register/etc. to CONFIG_PM_LEGACY, pm_legacy.h	2005-11-13 18:14:10 -08:00
68328serial.h	…
68360serial.c	…
Kconfig	[SPARC]: introduce a SPARC Kconfig symbol	2005-12-22 23:09:54 -08:00
Makefile	[SERIAL] Support Au1x00 8250 UARTs using the generic 8250 driver.	2005-11-06 09:07:03 +00:00
amba-pl010.c	[ARM] Move AMBA include files to include/linux/amba/	2006-01-07 13:52:45 +00:00
amba-pl011.c	[ARM] Move asm/hardware/clock.h to linux/clk.h	2006-01-07 16:15:52 +00:00
au1x00_uart.c	…
clps711x.c	[PATCH] ARM: Reverted 2918/1: [update] Base port of Comdial MP1000 platfrom	2005-11-04 17:28:34 +00:00
crisv10.c	[PATCH] serial: fix-up schedule_timeout() usage	2005-11-07 07:53:59 -08:00
crisv10.h	…
dz.c	[SERIAL] dz: Use CKSEG1ADDR to setup mappings.	2005-11-12 22:00:27 +00:00
dz.h	…
icom.c	…
icom.h	…
imx.c	[SERIAL] imx: Fix missed platform_driver_unregister	2005-11-21 17:05:21 +00:00
ioc4_serial.c	…
ip22zilog.c	…
ip22zilog.h	…
m32r_sio.c	…
m32r_sio.h	…
m32r_sio_reg.h	…
mcfserial.c	[PATCH] m68knommu: add 5208 ColdFire UART support to ColdFire serial driver	2005-11-07 08:00:46 -08:00
mcfserial.h	…
mpc52xx_uart.c	[PATCH] ppc32/serial: Change mpc52xx_uart.c to use the Low Density Serial port major	2006-01-06 08:33:30 -08:00
mpsc.c	[DRIVER MODEL] Convert platform drivers to use struct platform_driver	2005-11-09 22:32:44 +00:00
mpsc.h	…
mux.c	[PARISC] Define port->timeout to fix a long msleep in mux.c	2005-11-17 16:38:28 -05:00
pmac_zilog.c	[PATCH] powerpc: Remove device_node addrs/n_addr	2006-01-09 14:53:55 +11:00
pmac_zilog.h	…
pxa.c	[ARM] 3216/1: indent and typo in drivers/serial/pxa.c	2005-12-30 15:57:35 +00:00
s3c2410.c	[ARM] Move asm/hardware/clock.h to linux/clk.h	2006-01-07 16:15:52 +00:00
sa1100.c	[SERIAL] Remove unused variable in sa1100.c	2005-11-19 11:26:17 +00:00
serial_core.c	[SERIAL] Fix matching of MMIO ports	2006-01-04 18:09:44 +00:00
serial_cs.c	[PATCH] pcmcia: unify attach, EVENT_CARD_INSERTION handlers into one probe callback	2006-01-06 00:03:24 +01:00
serial_lh7a40x.c	…
serial_txx9.c	…
sh-sci.c	…
sh-sci.h	…
sn_console.c	…
suncore.c	…
suncore.h	…
sunsab.c	…
sunsab.h	…
sunsu.c	[SUNSU]: Do not mark sunsu_console_setup() __init	2005-11-07 14:10:21 -08:00
sunzilog.c	…
sunzilog.h	…
uart00.c	…
v850e_uart.c	…
vr41xx_siu.c	[DRIVER MODEL] Convert platform drivers to use struct platform_driver	2005-11-09 22:32:44 +00:00