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2006-01-09[PATCH] drivers/net/Kconfig: indentation fixAdrian Bunk1-1/+1
This patch fixes a wrong indentation. Signed-off-by: Adrian Bunk <bunk@stusta.de> Cc: "David S. Miller" <davem@davemloft.net> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Jeff Garzik <jgarzik@pobox.com>
2006-01-09[PATCH] Add MIPS dependency for dm9000 driverFranck1-1/+1
Add MIPS dependency for dm9000 ethernet controller. Indeed this controller is used by some embedded platforms based on MIPS CPUs. Signed-off-by: Franck Bui-Huu <franck.bui@gmail.com> Cc: Jeff Garzik <jgarzik@pobox.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Jeff Garzik <jgarzik@pobox.com>
2006-01-09[PATCH] update bonding.txt to not show ip address on slavesEric Paris1-2/+0
ifenslave, as of abi version 2, does not set the ip address on the slave interfaces. The documentation example however still shows that the ensalved interfaces should have the same IP as the master. The patch simply removes the lines from the example which should no longer appear. Signed-off-by: Eric Paris <eparis@redhat.com> bonding.txt | 2 -- 1 files changed, 2 deletions(-) Signed-off-by: Jeff Garzik <jgarzik@pobox.com>
2006-01-09[PATCH] tulip: enable multiport NIC BIOS fixups for x86_64Christoph Dworzak1-1/+1
A BIOS bug affecting some multiport tulip NICs requires an irq fixup in tulip_core.c. This has only been enabled for i686, but it is needed for x86_64 as well. Signed-off-by: John W. Linville <linville@tuxdriver.com> Signed-off-by: Jeff Garzik <jgarzik@pobox.com>
2006-01-09[PATCH] sata_nv, spurious interrupts at system startup with MAXTOR 6H500F0 driveAndrew Chew1-6/+24
This patch works around a problem with spurious interrupts seen at boot time when a MAXTOR 6H500F0 drive is present. An ATA interrupt condition is mysteriously present at start of day. If we took too long in issuing the first command, the kernel would basically get tired of the spurious interrupts and turn the interrupt off. Issuing the first command essentially causes the interrupt condition to get acknowledged. I haven't seen this happen with any other drives. What I basically do is ack ATA status by reading it regardless of whether we're expecting to have to handle an interrupt. This clears the start-of-day anomalous interrupt condition, and keeps the kernel from disabling that interrupt due to too many spurious interrupts. Also, I fixed a bug where hotplug interrupts weren't getting acknowledged as handled in the ISR. This was not the cause of the spurious interrupts, but it's the right thing to do anyway. Signed-Off-By: Andrew Chew Signed-off-by: Jeff Garzik <jgarzik@pobox.com>
2006-01-09[PATCH] PPC44x EMAC driver: disable TX status deferral in half-duplex modeEugene Surovegin2-2/+3
Disable TX status deferral (EMACx_MR[MWSW=001]) in half-duplex mode. I have two reports when EMAC stops transmitting when connected to a hub. TX ring debug printouts show complete mess when this happens, probably hardware collision handling doesn't work quite well in this mode. This is relevant only for SoCs with EMAC4 core (440GX, 440SP, 440SPe). Tested on 440GX. Signed-off-by: Eugene Surovegin <ebs@ebshome.net> Signed-off-by: Jeff Garzik <jgarzik@pobox.com>
2006-01-09[PATCH] ieee80211: enable hw wep where host has to build IVJohannes Berg3-20/+45
This patch fixes some of the ieee80211 crypto related code so that instead of having the host fully do crypto operations, the host_build_iv flag works properly (for WEP in this patch) which, if turned on, requires the hardware to do all crypto operations, but the ieee80211 layer builds the IV. The hardware also has to build the ICV. Previously, the host_build_iv flag couldn't be used at all for WEP, and not alone (with both host_decrypt and host_encrypt disabled) because the crypto algorithm wasn't assigned. This is also fixed. I have tested this patch both in host crypto mode and in hw crypto mode (with the Broadcom chipset). [resent, signing digitally caused it to be MIME-junked, sorry] Signed-Off-By: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: Jeff Garzik <jgarzik@pobox.com>
2006-01-09[PATCH] sk98lin: error handling of pci setupStephen Hemminger1-13/+6
Don't enable the pci device twice (already done in the probe routine). Propogate the error codes from pci_request_region back to initial probing. Signed-off-by: Stephen Hemminger <shemminger@osdl.org> Signed-off-by: Jeff Garzik <jgarzik@pobox.com>
2006-01-09[PATCH] sk98lin: error handling on probeStephen Hemminger1-11/+17
The sk98lin driver doesn't do proper error number handling during initialization. Note: -EAGAIN is a bogus return value for hardware errors. Signed-off-by: Stephen Hemminger <shemminger@osdl.org> Signed-off-by: Jeff Garzik <jgarzik@pobox.com>
2006-01-09[PATCH] sk98lin: use kzallocStephen Hemminger1-2/+1
Trivial use of kzalloc. Signed-off-by: Stephen Hemminger <shemminger@osdl.org> Signed-off-by: Jeff Garzik <jgarzik@pobox.com>
2006-01-09[PATCH] sk98lin: error handling on dual port boardStephen Hemminger1-15/+21
Sk98lin driver error recovery on two port boards is bad. If it fails the second allocation, it will not release resources properly. Also it registers the second port in the pci driver data If second port fails, might as well go with one port. Signed-off-by: Stephen Hemminger <shemminger@osdl.org> Signed-off-by: Jeff Garzik <jgarzik@pobox.com>
2006-01-09[PATCH] sk98lin: not doing high dma properlyStephen Hemminger1-4/+24
Sk98lin 64bit memory handling is wrong. It doesn't set the highdma flag; i.e. the kernel always does bounce buffers. It doesn't fallback to 32 bit mask if it can't get 64 bit mask. Signed-off-by: Stephen Hemminger <shemminger@osdl.org> Signed-off-by: Jeff Garzik <jgarzik@pobox.com>
2006-01-09[PATCH] sk98lin: routine called from probe marked __initStephen Hemminger1-8/+7
Sk98lin driver has a routine marked __init that is called from the probe code. If using pci hotplug, this could be called after the initialization so it needs to be marked __devinit. So if you hot added a sk98lin board, the kernel would crash. I don't have hot plug hardware to actually try this feat. Also, there are two routines, only called from SkGeBoardInit that can be marked __devinit. Signed-off-by: Stephen Hemminger <shemminger@osdl.org> Signed-off-by: Jeff Garzik <jgarzik@pobox.com>
2006-01-09[BLOCK] CCISS: update for blk softirq completionsJens Axboe1-26/+46
Signed-off-by: Jens Axboe <axboe@suse.de>
2006-01-09[IDE] Use the block layer deferred softirq request completionJens Axboe3-7/+38
This patch makes IDE use the new blk_complete_request() interface. There's still room for improvement, as __ide_end_request() really could drop the lock after getting HWGROUP->rq (why does it need to hold it in the first place? If ->rq access isn't serialized, we are screwed anyways). Signed-off-by: Jens Axboe <axboe@suse.de>
2006-01-09[SCSI] Kill the SCSI softirq handlingJens Axboe4-102/+45
This patch moves the SCSI softirq handling to the block layer version. There should be no functional changes. Signed-off-by: Jens Axboe <axboe@suse.de>
2006-01-09[BLOCK] ll_rw_blk: Enable out-of-order request completions through softirqJens Axboe3-4/+124
Request completion can be a quite heavy process, since it needs to iterate through the entire request and complete the bio's it holds. This patch adds blk_complete_request() which moves this processing into a dedicated block softirq. Signed-off-by: Jens Axboe <axboe@suse.de>
2006-01-09[BLOCK] Kill blk_attempt_remerge()Jens Axboe3-35/+0
It's a broken interface, it's done way too late. And apparently it triggers slab problems in recent kernels as well (most likely after the generic dispatch code was merged). So kill it, ide-cd is the only user of it. Signed-off-by: Jens Axboe <axboe@suse.de>
2006-01-09[BLOCK] scsi_ioctl: file can be NULL from ioctl_by_bdev()Jens Axboe1-4/+9
Signed-off-by: Jens Axboe <axboe@suse.de>
2006-01-09[BLOCK] bio: init ->bi_bdev in bio_init()Jens Axboe1-0/+1
For SG_IO requests, bio->bi_bdev may not be explicitly initialized. So make bio_init() clear the field to make sure it's always NULL or valid. Signed-off-by: Jens Axboe <axboe@suse.de>
2006-01-09make elv_try_merge() static, kill the dead declaration ofCoywolf Qi Hunt2-4/+1
elv_try_last_merge(). Signed-off-by: Coywolf Qi Hunt <qiyong@fc-cn.com> Signed-off-by: Jens Axboe <axboe@suse.de>
2006-01-09[BLOCK][TRIVIAL] ll_rw_blk: header included twiceNicolas Kaiser1-1/+0
linux/blkdev.h included twice Signed-off-by: Nicolas Kaiser <nikai@nikai.net> Signed-off-by: Jens Axboe <axboe@suse.de>
2006-01-09powerpc: unbreak iSeries compilation againPaul Mackerras2-1/+5
We don't set CONFIG_PPC_MULTIPLATFORM on iSeries (yet). Avoid compiling in the prom_init stuff on iSeries. Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-01-09[PATCH] powerpc: Don't use KERNELBASE in add_memory()Michael Ellerman1-1/+1
In add_memory() we should be using __va() to get a virtual address. Spotted by Mike Kravetz. Signed-off-by: Michael Ellerman <michael@ellerman.id.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-01-09powerpc: set CONFIG_PPC_OF=y always for ARCH=powerpcPaul Mackerras3-7/+5
The CONFIG_PPC_OF symbol is used to mean that the firmware device tree access functions are available. Since we always have a device tree with ARCH=powerpc, make CONFIG_PPC_OF always Y for ARCH=powerpc. This fixes some compile errors reported by Kumar Gala, but in a different way to his patch. This also makes prom_parse.o be compiled only if CONFIG_PPC_OF so that non-OF ARCH=ppc platforms will compile. Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-01-09[PATCH] powerpc: DABR exceptions should report the address not the PCAnton Blanchard1-3/+4
When taking a DABR exception we were reporting the PC. It makes more sense to report the address that caused the exception, and the gdb guys would like it that way. Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-01-09[PATCH] ppc64: POWER5+ oprofile supportAnton Blanchard1-2/+2
POWER5+ adds new PMU groups and as such needs to be treated differently by oprofile userspace. Change it to report itself as power5+. Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-01-09[PATCH] ppc64: Fix oprofile when compiled as a moduleAnton Blanchard3-82/+59
My recent changes to oprofile broke it when built as a module. Fix it by using an enum instead of a function pointer. This way we still retain the oprofile configuration in the cputable. Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-01-09[PATCH] 4/5 powerpc: Add cpufreq support for all desktop G5Benjamin Herrenschmidt1-47/+449
This patch adds cpufreq support for all desktop "tower" G5 models. The only G5 models still lacking cpufreq support at this point are the Xserve and possibly the new iMac iSight (not tested). I'll have those added soon. That patch uses the new platform functions interpreter to implement frequency and voltage switching on most models. Note that in order to find the low frequency value, I had to hack something that might now work properly on all models, so if the frequency value reported when running low speed looks bogus to you, please report it to me. (Appart from a bogus reported value, things should work fine). Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-01-09[PATCH] 3/5 powerpc: Add platform functions interpreterBenjamin Herrenschmidt10-42/+2028
This is the platform function interpreter itself along with the backends for UniN/U3/U4, mac-io, GPIOs and i2c. It adds the ability to execute those do-platform-* scripts in the device-tree (at least for most devices for which a backend is provided). This should replace the clock spreading hacks properly. It might also have an impact on all sort of machines since some of the scripts marked "at init" will now be executed on boot (or some other on sleep/wakeup), those will possibly do things that the kernel didn't do at all, like setting some values into some i2c devices (changing thermal sensor calibration or conversion rate) etc... Thus regression testing is MUCH welcome. Also loook for errors in dmesg. That's also why I've left rather verbose debugging enabled in this version of the patch. (I do expect some Windtunnel G4s to show some errors as they have an i2c clock chip on the PMU bus that uses some primitives that the i2c backend doesn't implement yet. I really need users that have one of those machine to come back to me so we can get that done right, though the errors themselves should be harmless, I suspect the machine might not run at full speed). Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-01-09[PATCH] 2/5 powerpc: Rework PowerMac i2c part 2Benjamin Herrenschmidt12-1364/+563
This is the continuation of the previous patch. This one removes the old PowerMac i2c drivers (i2c-keywest and i2c-pmac-smu) and replaces them both with a single stub driver that uses the new PowerMac low i2c layer. Now that i2c-keywest is gone, the low-i2c code is extended to support interrupt driver transfers. All i2c busses now appear as platform devices. Compatibility with existing drivers should be maintained as the i2c bus names have been kept identical, except for the SMU bus but in that later case, all users has been fixed. With that patch added, matching a device node to an i2c_adapter becomes trivial. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-01-09[PATCH] 1/5 powerpc: Rework PowerMac i2c part 1Benjamin Herrenschmidt11-667/+859
This is the first part of a rework of the PowerMac i2c code. It completely reworks the "low_i2c" layer. It is now more flexible, supports KeyWest, SMU and PMU i2c busses, and provides functions to match device nodes to i2c busses and adapters. This patch also extends & fix some bugs in the SMU driver related to i2c support and removes the clock spreading hacks from the pmac feature code rather than adapting them to the new API since they'll be replaced by the platform function code completely in patch 3/5 Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-01-09[PATCH] ppc64: fix time syscallAnton Blanchard2-29/+1
ppc64 has its own version of sys_time. It looks pretty scary, touching a whole bunch of variables without any locking or memory ordering. In fact, a recent bugreport has shown it can actually go backwards. Time to remove it and just use the generic sys_time, which is implemented on top of do_gettimeofday. Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-01-09[PATCH] ppc32: Put cache flush routines back into .relocate_code sectionPaul Janzen1-2/+4
In 2.6.14, we had the following definition of _GLOBAL() in include/asm-ppc/processor.h: #define _GLOBAL(n)\ .stabs __stringify(n:F-1),N_FUN,0,0,n;\ .globl n;\ n: In 2.6.15, as part of the great powerpc merge, we moved this definition to include/asm-powerpc/ppc_asm.h, where it appears (to 32-bit code) as: #define _GLOBAL(n) \ .text; \ .stabs __stringify(n:F-1),N_FUN,0,0,n;\ .globl n; \ n: Mostly, this is fine. However, we also have the following, in arch/ppc/boot/common/util.S: .section ".relocate_code","xa" [...] _GLOBAL(flush_instruction_cache) [...] _GLOBAL(flush_data_cache) [...] The addition of the .text section definition in the definition of _GLOBAL overrides the .relocate_code section definition. As a result, these two functions don't end up in .relocate_code, so they don't get relocated correctly, and the boot fails. There's another suspicious-looking usage at kernel/swsusp.S:37 that someone should look into. I did not exhaustively search the source tree, though. The following is the minimal patch that fixes the immediate problem. I could easily be convinced that the _GLOBAL definition should be modified to remove the ".text;" line either instead of, or in addition to, this fix. Signed-off-by: Paul Janzen <pcj@linux.sez.to> Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-01-09[PATCH] spufs: set irq affinity for running threadsArnd Bergmann5-16/+41
For far, all SPU triggered interrupts always end up on the first SMT thread, which is a bad solution. This patch implements setting the affinity to the CPU that was running last when entering execution on an SPU. This should result in a significant reduction in IPI calls and better cache locality for SPE thread specific data. Signed-off-by: Arnd Bergmann <arndb@de.ibm.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-01-09[PATCH] spufs: fix allocation on 64k pagesArnd Bergmann1-3/+1
The size of the local store is architecture defined and independent from the page size, so it should not be defined in terms of pages in the first place. This mistake broke a few places when building for 64kb pages. Signed-off-by: Arnd Bergmann <arndb@de.ibm.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-01-09[PATCH] spufs: fix sparse warningsArnd Bergmann4-6/+5
One local variable is missing an __iomem modifier, in another place, we pass a completely unused argument with a missing __user modifier. Signed-off-by: Arnd Bergmann <arndb@de.ibm.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-01-09[PATCH] spufs: abstract priv1 register access.Arnd Bergmann6-135/+233
In a hypervisor based setup, direct access to the first priviledged register space can typically not be allowed to the kernel and has to be implemented through hypervisor calls. As suggested by Masato Noguchi, let's abstract the register access trough a number of function calls. Since there is currently no public specification of actual hypervisor calls to implement this, I only provide a place that makes it easier to hook into. Cc: Masato Noguchi <Masato.Noguchi@jp.sony.com> Cc: Geoff Levand <geoff.levand@am.sony.com> Signed-off-by: Arnd Bergmann <arndb@de.ibm.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-01-09[PATCH] spufs: move spu_run call to its own fileArnd Bergmann4-153/+160
The logic for sys_spu_run keeps growing and it does not really belong into file.c any more since we moved away from using regular file operations to our own syscall. No functional change in here. Signed-off-by: Arnd Bergmann <arndb@de.ibm.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-01-09[PATCH] spufs: clean up use of bitopsArnd Bergmann5-17/+14
checking bits manually might not be synchonized with the use of set_bit/clear_bit. Make sure we always use the correct bitops by removing the unnecessary identifiers. Signed-off-by: Arnd Bergmann <arndb@de.ibm.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-01-09[PATCH] spufs: fix spufs_fill_dir error pathArnd Bergmann1-35/+38
If creating one entry failed in spufs_fill_dir, we never cleaned up the freshly created entries. Fix this by calling the cleanup function on error. Noticed by Al Viro. Signed-off-by: Arnd Bergmann <arndb@de.ibm.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-01-09[PATCH] spufs: dont leak directories in failed spu_createArnd Bergmann1-17/+37
If get_unused_fd failed in sys_spu_create, we never cleaned up the created directory. Fix that by restructuring the error path. Noticed by Al Viro. Signed-off-by: Arnd Bergmann <arndb@de.ibm.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-01-09[PATCH] spufs fix spu_acquire_runnable error pathArnd Bergmann1-2/+2
When spu_activate fails in spu_acquire_runnable, the state must still be SPU_STATE_SAVED, we were incorrectly setting it to SPU_STATE_RUNNABLE. Signed-off-by: Arnd Bergmann <arndb@de.ibm.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-01-09[PATCH] spufs: serialize sys_spu_run per spuArnd Bergmann3-5/+12
During an earlier cleanup, we lost the serialization of multiple spu_run calls performed on the same spu_context. In order to get this back, introduce a mutex in the spu_context that is held inside of spu_run. Noticed by Al Viro. Signed-off-by: Arnd Bergmann <arndb@de.ibm.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-01-09[PATCH] spufs: check for proper file pointer in sys_spu_runArnd Bergmann3-3/+5
Only checking for SPUFS_MAGIC is not reliable, because it might not be unique in theory. Worse than that, we accidentally allow spu_run to be performed on any file in spufs, not just those returned from spu_create as intended. Noticed by Al Viro. Signed-off-by: Arnd Bergmann <arndb@de.ibm.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-01-09[PATCH] spufs: dont hold root->isem in spu_forgetArnd Bergmann1-10/+10
spu_forget will do mmput on the DMA address space, which can lead to lots of other stuff getting triggered. We better not hold a semaphore here that we might need in the process. Noticed by Al Viro. Signed-off-by: Arnd Bergmann <arndb@de.ibm.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-01-09[PATCH] spufs: fix locking in spu_acquire_runnableArnd Bergmann1-4/+6
We need to check for validity of owner under down_write, down_read is not enough. Noticed by Al Viro. Signed-off-by: Arnd Bergmann <arndb@de.ibm.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-01-09[PATCH] cell: enable pause(0) in cpu_idleArnd Bergmann12-14/+335
This patch enables support for pause(0) power management state for the Cell Broadband Processor, which is import for power efficient operation. The pervasive infrastructure will in the future enable us to introduce more functionality specific to the Cell's pervasive unit. From: Maximino Aguilar <maguilar@us.ibm.com> Signed-off-by: Arnd Bergmann <arndb@de.ibm.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-01-09[PATCH] powerpc: fixing compile issue with !CONFIG_PCI in legacy_serial.cKumar Gala1-1/+11
Only build in support for ISA and PCI cases if we have enabled CONFIG_ISA and CONFIG_PCI. Additionally, isa_bridge is a global so we shouldn't use it a parameter name since it gets redefined to NULL when !CONFIG_PCI. Signed-off-by: Kumar Gala <galak@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-01-09[PATCH] ppc32: cpm_uart: fix xchar sendingAristeu Sergio Rozanski Filho1-1/+1
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>
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