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David Gibson abb4a23907 serial: define FIXED_PORT flag for serial_core 
At present, the serial core always allows setserial in userspace to change the
port address, irq and base clock of any serial port.  That makes sense for
legacy ISA ports, but not for (say) embedded ns16550 compatible serial ports
at peculiar addresses.  In these cases, the kernel code configuring the ports
must know exactly where they are, and their clocking arrangements (which can
be unusual on embedded boards).  It doesn't make sense for userspace to change
these settings.

Therefore, this patch defines a UPF_FIXED_PORT flag for the uart_port
structure.  If this flag is set when the serial port is configured, any
attempts to alter the port's type, io address, irq or base clock with
setserial are ignored.

In addition this patch uses the new flag for on-chip serial ports probed in
arch/powerpc/kernel/legacy_serial.c, and for other hard-wired serial ports
probed by drivers/serial/of_serial.c.

Signed-off-by: David Gibson <dwg@au1.ibm.com>
Cc: Russell King <rmk@arm.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
 		2007-05-07 12:12:50 -07:00
..
vdso32 [POWERPC] Support feature fixups in vdso's 2006-10-25 11:54:07 +10:00
vdso64 [POWERPC] Cell timebase bug workaround 2006-10-25 11:54:18 +10:00
Makefile [PATCH] x86: Move swsusp __pa() dependent code to arch portion 2007-05-02 19:27:07 +02:00
align.c [POWERPC] Alignment exception uses __get/put_user_inatomic 2007-04-13 04:09:38 +10:00
asm-offsets.c [POWERPC] Save trap number in bad_stack 2007-04-24 22:06:59 +10:00
audit.c
…
binfmt_elf32.c
…
btext.c [POWERPC] Rename get_property to of_get_property: arch/powerpc 2007-04-13 03:55:19 +10:00
compat_audit.c
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cpu_setup_6xx.S
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cpu_setup_pa6t.S [POWERPC] pasemi: Enable one more hid bit 2007-04-24 21:31:49 +10:00
cpu_setup_ppc970.S [POWERPC] powerpc: Enable DEEPNAP power savings mode on 970MP 2006-10-16 16:32:25 +10:00
cputable.c [POWERPC] pasemi: PA6T oprofile support 2007-04-24 21:31:51 +10:00
crash.c [PATCH] Kexec / Kdump: Unify elf note code 2006-12-07 08:39:46 -08:00
crash_dump.c
…
dma_64.c [POWERPC] Make direct DMA use node local allocations 2006-12-04 20:38:59 +11:00
entry_32.S [POWERPC] Remove last_syscall 2007-03-22 22:52:58 +11:00
entry_64.S [POWERPC] Clear RI bit in MSR before restoring r13 when returning to userspace 2007-02-07 14:03:23 +11:00
firmware.c
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fpu.S
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head_4xx.S
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head_8xx.S
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head_32.S [POWERPC] Remove the broken Gemini support 2007-01-24 21:13:58 +11:00
head_44x.S [POWERPC] Remove ibm4{xx,4x}.h from arch/powerpc 2007-02-13 14:59:52 +11:00
head_64.S [POWERPC] Save trap number in bad_stack 2007-04-24 22:06:59 +10:00
head_booke.h
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head_fsl_booke.S [POWERPC] 85xx: Drop use of SYNC macro in head_fsl_booke.S 2007-02-13 16:13:27 -06:00
ibmebus.c [POWERPC] ibmebus: change probe/remove interface from using loc-code to DT path 2007-04-13 06:12:42 +10:00
idle.c [PATCH] sysctl: remove insert_at_head from register_sysctl 2007-02-14 08:09:59 -08:00
idle_6xx.S
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idle_power4.S [POWERPC] Lazy interrupt disabling for 64-bit machines 2006-10-16 16:31:36 +10:00
init_task.c
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io.c [POWERPC] Merge 32 and 64 bits asm-powerpc/io.h 2006-12-04 20:39:05 +11:00
iomap.c [POWERPC] Remove fastcall function attribute 2007-01-26 01:52:27 -06:00
iommu.c Revert "[POWERPC] DMA 4GB boundary protection" 2007-04-26 19:48:15 +10:00
irq.c [POWERPC] Spinlock initializer cleanup 2007-04-30 11:02:06 +10:00
kprobes.c [POWERPC] kprobes: Eliminate sstep exception if instruction can be emulated 2007-04-24 21:31:58 +10:00
l2cr_6xx.S
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legacy_serial.c serial: define FIXED_PORT flag for serial_core 2007-05-07 12:12:50 -07:00
lparcfg.c [POWERPC] Replace if-then-else with a switch statement 2007-04-27 21:13:21 +10:00
lparmap.c
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machine_kexec.c
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machine_kexec_32.c
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machine_kexec_64.c [POWERPC] Rename get_property to of_get_property: arch/powerpc 2007-04-13 03:55:19 +10:00
misc.S
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misc_32.S [POWERPC] Remove _get_SP 2007-03-22 22:52:58 +11:00
misc_64.S [POWERPC] pasemi: UART udbg support 2007-02-07 14:03:22 +11:00
module_32.c [POWERPC] Add support for R_PPC_ADDR16_HI relocations 2007-01-24 21:13:58 +11:00
module_64.c [POWERPC] Generic BUG for powerpc 2006-12-11 16:35:07 +11:00
nvram_64.c [PATCH] mark struct file_operations const 2 2007-02-12 09:48:44 -08:00
of_device.c [POWERPC] Rename last get_property calls 2007-04-24 21:31:40 +10:00
of_platform.c Merge branch 'linux-2.6' into for-2.6.22 2007-04-30 12:38:01 +10:00
paca.c
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pci_32.c [POWERPC] pci_32.c: Switch to ref counting PCI API 2007-04-24 22:12:20 +10:00
pci_64.c PCI: Convert to alloc_pci_dev() 2007-05-02 19:02:37 -07:00
pci_dn.c [POWERPC] Rename get_property to of_get_property: arch/powerpc 2007-04-13 03:55:19 +10:00
pmc.c [POWERPC] PA6T PMC support 2007-02-07 14:03:19 +11:00
ppc32.h
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ppc_ksyms.c Merge branch 'linux-2.6' into for-2.6.22 2007-04-30 12:38:01 +10:00
proc_ppc64.c [PATCH] mark struct file_operations const 2 2007-02-12 09:48:44 -08:00
process.c [POWERPC] Make tlb flush batch use lazy MMU mode 2007-04-13 04:09:38 +10:00
prom.c [POWERPC] Remove old interface find_devices 2007-04-24 22:09:02 +10:00
prom_init.c [POWERPC] Add correct interrupt property for pegasos ide 2007-04-13 04:00:25 +10:00
prom_parse.c [POWERPC] Rename get_property to of_get_property: arch/powerpc 2007-04-13 03:55:19 +10:00
ptrace-common.h
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ptrace.c [POWERPC] Mask 32-bit system call arguments to 32 bits on PPC64 in audit code 2007-01-24 21:13:58 +11:00
ptrace32.c
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rtas-proc.c [POWERPC] Rename get_property to of_get_property: arch/powerpc 2007-04-13 03:55:19 +10:00
rtas-rtc.c
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rtas.c [POWERPC] Remove old interface find_path_device 2007-04-24 22:08:59 +10:00
rtas_flash.c [PATCH] mark struct file_operations const 2 2007-02-12 09:48:44 -08:00
rtas_pci.c [POWERPC] Rename get_property to of_get_property: arch/powerpc 2007-04-13 03:55:19 +10:00
semaphore.c
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setup-common.c [POWERPC] Generic check_legacy_ioport 2007-04-27 21:14:30 +10:00
setup.h
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setup_32.c [POWERPC] Fix breakage caused by 72486f1f8f 2007-04-13 03:55:16 +10:00
setup_64.c [PATCH] x86: Allow percpu variables to be page-aligned 2007-05-02 19:27:12 +02:00
signal_32.c [POWERPC] Fix register save area alignment for swapcontext syscall 2006-12-20 16:37:49 +11:00
signal_64.c
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smp-tbsync.c [POWERPC] Replace kmalloc+memset with kzalloc 2006-12-04 20:42:09 +11:00
smp.c [POWERPC] Make tlb flush batch use lazy MMU mode 2007-04-13 04:09:38 +10:00
suspend.c [PATCH] x86: Move swsusp __pa() dependent code to arch portion 2007-05-02 19:27:07 +02:00
swsusp_32.S
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sys_ppc32.c [POWERPC] Clean up unused ROUND_UP, NAME_OFFSET macros in arch/powerpc 2007-04-13 04:00:41 +10:00
syscalls.c
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sysfs.c [POWERPC] Remove old interface find_path_device 2007-04-24 22:08:59 +10:00
systbl.S
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tau_6xx.c
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time.c [POWERPC] Rename get_property to of_get_property: arch/powerpc 2007-04-13 03:55:19 +10:00
traps.c [POWERPC] Fix backwards ? : when printing machine type 2007-03-26 12:34:31 +10:00
udbg.c [POWERPC] Use udbg_early_init() on ppc32 2007-02-14 11:55:16 +11:00
udbg_16550.c [PATCH] constant should be long 2007-03-14 15:27:50 -07:00
vdso.c [POWERPC] Fix vDSO page count calculation 2007-02-13 15:35:52 +11:00
vecemu.c
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vector.S
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vio.c remove "struct subsystem" as it is no longer needed 2007-05-02 18:57:59 -07:00
vmlinux.lds.S [PATCH] x86: Allow percpu variables to be page-aligned 2007-05-02 19:27:12 +02:00