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* firewire: fw-sbp2: fix parsing of logical unit directoriesRichard Sharpe2008-06-27
| | | | | | | | | | There is a small off-by-one bug in firewire-sbp2. This causes problems when a device exports multiple LUN Directories. I found it when trying to talk to a SONY DVD Jukebox. Signed-off-by: Richard Sharpe <realrichardsharpe@gmail.com> Acked-by: Kristian Høgsberg <krh@redhat.com> Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de> (op. order, changelog)
* firewire: Kconfig menu touch-upStefan Richter2008-06-18
| | | | | | | Emphasize the recommendation to build only one stack. Trim the prompts to better fit into short attention spans. Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
* firewire: deadline for PHY config transmissionStefan Richter2008-06-18
| | | | | | | | | | | | | | | | | | | | | | | | | | If the low-level driver failed to initialize a card properly without noticing it, fw-core was blocked indefinitely when trying to send a PHY config packet. This hung up the events kernel thread, e.g. locked up keyboard input. https://bugzilla.redhat.com/show_bug.cgi?id=444694 https://bugzilla.redhat.com/show_bug.cgi?id=446763 This problem was introduced between 2.6.25 and 2.6.26-rc1 by commit 2a0a2590498be7b92e3e76409c9b8ee722e23c8f "firewire: wait until PHY configuration packet was transmitted (fix bus reset loop)". The solution is to wait with timeout. I tested it with 7 different working controllers and 1 non-working controller. On the working ones, the packet callback complete()s usually --- but not always --- before a timeout of 10ms. Hence I chose a safer timeout of 100ms. On the few tests with the non-working controller ALi M5271, PHY config packet transmission always timed out so far. (Fw-ohci needs to be fixed for this controller independently of this deadline fix. Often the core doesn't even attempt to send a phy config because not even self ID reception works.) Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
* firewire: fw-ohci: unify printk prefixesStefan Richter2008-06-18
| | | | | | | | | The messages which can be enabled by fw-ohci's debug module parameter are changed from KERN_DEBUG to KERN_NOTICE level and uniformly prefixed with "firewire_ohci: ". This further simplifies communication with users when we ask them to capture debug messages. Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
* firewire: fill_bus_reset_event needs lock protectionStefan Richter2008-06-18
| | | | | | | | | | | | | | | | | | | | | Callers of fill_bus_reset_event() have to take card->lock. Otherwise access to node data may oops if node removal is in progress. A lockless alternative would be - event->local_node_id = card->local_node->node_id; + tmp = fw_node_get(card->local_node); + event->local_node_id = tmp->node_id; + fw_node_put(tmp); and ditto with the other node pointers which fill_bus_reset_event() accesses. But I went the locked route because one of the two callers already holds the lock. As a bonus, we don't need the memory barrier anymore because device->generation and device->node_id are written in a card->lock protected section. Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de> Signed-off-by: Kristian Høgsberg <krh@redhat.com>
* firewire: fw-ohci: write selfIDBufferPtr before LinkControl.rcvSelfIDStefan Richter2008-06-18
| | | | | | | | | | | | | OHCI 1.1 clause 5.10 requires that selfIDBufferPtr is valid when a 1 is written into LinkControl.rcvSelfID. This driver bug has so far not been known to cause harm because most chips obviously accept a later selfIDBufferPtr write, at least before HCControl.linkEnable is written. Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de> Signed-off-by: Jarod Wilson <jwilson@redhat.com> Signed-off-by: Kristian Høgsberg <krh@redhat.com>
* firewire: fw-ohci: disable PHY packet reception into AR contextStefan Richter2008-06-18
| | | | | | | | | | | | | We want the rcvPhyPkt bit in LinkControl off before we start using the chip. However, the spec says that the reset value of it is undefined. Hence switch it explicitly off. https://bugzilla.redhat.com/show_bug.cgi?id=244576#c48 shows that for example the nForce2 integrated FireWire controller seems to have it on by default. Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de> Signed-off-by: Jarod Wilson <jwilson@redhat.com>
* firewire: fw-ohci: use of uninitialized data in AR handlerStefan Richter2008-06-18
| | | | | | | | | | | | header_length and payload_length are filled with random data if an unknown tcode was read from the AR buffer (i.e. if the AR buffer contained invalid data). We still need a better strategy to recover from this, but at least handle_ar_packet now doesn't return out of bound buffer addresses anymore. Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
* firewire: don't panic on invalid AR request bufferStefan Richter2008-06-18
| | | | | | | | | | | BUG() at this place is wrong. (Unless if the low level driver would already do higher-level input validation of incoming request headers.) Invalid incoming requests or bugs in the controller which corrupt the AR-req buffer needlessly crashed the box because this is run in tasklet context. Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
* firewire: prevent userspace from accessing shut down devicesJay Fenlason2008-05-20
| | | | | | | | | | | | | | | | If userspace ignores the POLLERR bit from poll(), and only attempts to read() the device when POLLIN is set, it can still make ioctl() calls on a device that has been removed from the system. The node_id and generation returned by GET_INFO will be outdated, but INITIATE_BUS_RESET would still cause a bus reset, and GET_CYCLE_TIMER will return data. And if you guess the correct generation to use, you can send requests to a different device on the bus, and get responses back. This patch prevents open, ioctl, compat_ioctl, and mmap against shutdown devices. Signed-off-by: Jay Fenlason <fenlason@redhat.com> Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
* Merge git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi-misc-2.6Linus Torvalds2008-05-02
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi-misc-2.6: [SCSI] aic94xx: fix section mismatch [SCSI] u14-34f: Fix 32bit only problem [SCSI] dpt_i2o: sysfs code [SCSI] dpt_i2o: 64 bit support [SCSI] dpt_i2o: move from virt_to_bus/bus_to_virt to dma_alloc_coherent [SCSI] dpt_i2o: use standard __init / __exit code [SCSI] megaraid_sas: fix suspend/resume sections [SCSI] aacraid: Add Power Management support [SCSI] aacraid: Fix jbod operations scan issues [SCSI] aacraid: Fix warning about macro side-effects [SCSI] add support for variable length extended commands [SCSI] Let scsi_cmnd->cmnd use request->cmd buffer [SCSI] bsg: add large command support [SCSI] aacraid: Fix down_interruptible() to check the return value correctly [SCSI] megaraid_sas; Update the Version and Changelog [SCSI] ibmvscsi: Handle non SCSI error status [SCSI] bug fix for free list handling [SCSI] ipr: Rename ipr's state scsi host attribute to prevent collisions [SCSI] megaraid_mbox: fix Dell CERC firmware problem
| * [SCSI] Let scsi_cmnd->cmnd use request->cmd bufferBoaz Harrosh2008-05-02
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | - struct scsi_cmnd had a 16 bytes command buffer of its own. This is an unnecessary duplication and copy of request's cmd. It is probably left overs from the time that scsi_cmnd could function without a request attached. So clean that up. - Once above is done, few places, apart from scsi-ml, needed adjustments due to changing the data type of scsi_cmnd->cmnd. - Lots of drivers still use MAX_COMMAND_SIZE. So I have left that #define but equate it to BLK_MAX_CDB. The way I see it and is reflected in the patch below is. MAX_COMMAND_SIZE - means: The longest fixed-length (*) SCSI CDB as per the SCSI standard and is not related to the implementation. BLK_MAX_CDB. - The allocated space at the request level - I have audit all ISA drivers and made sure none use ->cmnd in a DMA Operation. Same audit was done by Andi Kleen. (*)fixed-length here means commands that their size can be determined by their opcode and the CDB does not carry a length specifier, (unlike the VARIABLE_LENGTH_CMD(0x7f) command). This is actually not exactly true and the SCSI standard also defines extended commands and vendor specific commands that can be bigger than 16 bytes. The kernel will support these using the same infrastructure used for VARLEN CDB's. So in effect MAX_COMMAND_SIZE means the maximum size command scsi-ml supports without specifying a cmd_len by ULD's Signed-off-by: Boaz Harrosh <bharrosh@panasas.com> Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
* | Merge branch 'for-linus' of ↵Linus Torvalds2008-05-01
|\ \ | |/ |/| | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/ieee1394/linux1394-2.6 * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ieee1394/linux1394-2.6: firewire: fw-sbp2: log scsi_target ID at release ieee1394: fix NULL pointer dereference in sysfs access
| * firewire: fw-sbp2: log scsi_target ID at releaseStefan Richter2008-05-01
| | | | | | | | | | | | | | Makes the good-by message more informative. Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de> Signed-off-by: Jarod Wilson <jwilson@redhat.com>
* | Convert asm/semaphore.h users to linux/semaphore.hMatthew Wilcox2008-04-18
| | | | | | | | Signed-off-by: Matthew Wilcox <willy@linux.intel.com>
* | drivers: Remove unnecessary inclusions of asm/semaphore.hMatthew Wilcox2008-04-18
|/ | | | | | | | | None of these files use any of the functionality promised by asm/semaphore.h. It's possible that they rely on it dragging in some unrelated header file, but I can't build all these files, so we'll have fix any build failures as they come up. Signed-off-by: Matthew Wilcox <willy@linux.intel.com>
* firewire: cleanupsAdrian Bunk2008-04-18
| | | | | | | | | | | | | | | | | | | | This patch contains the following cleanups: - #if 0 the following unused structs: - fw-transaction.c:fw_low_memory_region - fw-transaction.c:fw_private_region - fw-transaction.c:fw_csr_region - fw-transaction.c:fw_unit_space_region - remove the following unused EXPORT_SYMBOL's: - fw-card.c:fw_core_add_descriptor - fw-card.c:fw_core_remove_descriptor - fw-iso.c:fw_iso_context_create - fw-iso.c:fw_iso_context_destroy - fw-iso.c:fw_iso_context_start - fw-iso.c:fw_iso_context_queue - fw-iso.c:fw_iso_context_stop Signed-off-by: Adrian Bunk <bunk@kernel.org> Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
* firewire: fix synchronization of gap countsStefan Richter2008-04-18
| | | | | | | | | | | | | Fix: The fact that nodes had different gap counts would be overlooked if the bus manager code would pick gap count 63 because of beta repeaters or because of very large hop counts. In this case, the bus manager code would miss that it actually has to send the PHY config packet with gap count 63. Related trivial changes: Use bool for an int used as bool, touch up some comments. Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
* firewire: wait until PHY configuration packet was transmitted (fix bus reset ↵Stefan Richter2008-04-18
| | | | | | | | | | | | | | | | | loop) We now exit fw_send_phy_config /after/ the PHY config packet has been transmitted, instead of before. A subsequent fw_core_initiate_bus_reset will therefore not overlap with the transmission. This is meant to make the send PHY config packet + reset bus routine more deterministic. Fixes bus reset loop and eventual panic with - VIA VT6307 + IOGEAR hub + Unibrain Fire-i camera http://bugzilla.kernel.org/show_bug.cgi?id=10128 - JMicron card Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de> Signed-off-by: Jarod Wilson <jwilson@redhat.com>
* firewire: remove unused struct memberStefan Richter2008-04-18
| | | | | | request_generation is internal to fw-ohci and unneeded in fw_card. Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
* firewire: use bitwise and to get reg in handle_registersJarod Wilson2008-04-18
| | | | | | | for code efficiency. Signed-off-by: Jarod Wilson <jwilson@redhat.com> Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
* firewire: replace more hex values with defined csr constantsJarod Wilson2008-04-18
| | | | | | | | Trivial change to replace more meaningless (to the untrained eye) hex values with defined CSR constants. Signed-off-by: Jarod Wilson <jwilson@redhat.com> Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
* firewire: reread config ROM when device reset the busStefan Richter2008-04-18
| | | | | | | | | | | | | | | | | | | When a device changes its configuration ROM, it announces this with a bus reset. firewire-core has to check which node initiated a bus reset and whether any unit directories went away or were added on this node. Tested with an IOI FWB-IDE01AB which has its link-on bit set if bus power is available but does not respond to ROM read requests if self power is off. This implements - recognition of the units if self power is switched on after fw-core gave up the initial attempt to read the config ROM, - shutdown of the units when self power is switched off. Also tested with a second PC running Linux/ieee1394. When the eth1394 driver is inserted and removed on that node, fw-core now notices the addition and removal of the IPv4 unit on the ieee1394 node. Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
* firewire: replace static ROM cache by allocated cacheStefan Richter2008-04-18
| | | | | | | | read_bus_info_block() is repeatedly called by workqueue jobs. These will step on each others toes eventually if there are multiple workqueue threads, and we end up with corrupt config ROM images. Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
* firewire: fw-ohci: work around generation bug in TI controllers (fix AV/C ↵Stefan Richter2008-04-18
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | and more) Unlike the ohci1394 driver, fw-ohci uses the selfIDGeneration field of bus reset packets to determine the generation of incoming requests as per OHCI 1.1 clause 8.4.2.3. This is more precise --- provided that the controller inserts the correct generation. Texas Instruments chips often don't. This prevented the transmission of response packets, which for example broke AV/C transactions as used when communicating with miniDV cameras and any other AV/C devices. There is apparently no way to detect and adjust incorrect generations. Therefore we ignore the generation of bus reset packets from TI chips and use the generation of the self ID buffer instead. Alas this is received at a slightly wrong time. In rare cases, this could cause us to not respond to legitimate requests or to respond to expired requests. (The latter is less likely because the bus reset packet AR event is typically handled before the self ID complete event.) Bug reported by Mladen Kuntner, who was extraordinarily patient while dealing with the driver maintainers. Fix confirmed to be required and effective for TSB82AA2 and a TSB43AB22 or TSB43AB22A. https://bugzilla.redhat.com/show_bug.cgi?id=243081 Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de> Signed-off-by: Jarod Wilson <jwilson@redhat.com>
* firewire: fw-ohci: extend logging of bus generations and node IDStefan Richter2008-04-18
| | | | | | | | | | | | | | Extend the logging of "AR evt_bus_reset, link internal" to "AR evt_bus_reset, generation ${selfIDGeneration}". That way we can check whether this generation matches the one seen in self ID complete event logging. See OHCI 1.1 clause 8.4.2.3. Also extend logging of "firewire_ohci: * selfIDs, generation *" by "local node ID ffc*" in self ID logging to make the local node in AT/AR event logs more obvious. Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de> Signed-off-by: Jarod Wilson <jwilson@redhat.com>
* firewire: fw-ohci: conditionally log busReset interruptsStefan Richter2008-04-18
| | | | | | | | | | | | | | | | | | | | Add a debug option to watch bus reset interrupt events. Half of this patch is taken from Jarod Wilson's first version of the JMicron fix. BusReset interrupts are only generated if the respective module parameter flag was set before the controller is being initialized. Else we keep this event masked to reduce IRQ load in normal operation and to avoid potential problems with buggy chips. Note, this is unlike the other IRQ events whose logging can be enabled any time after chip initialization. This and the influence on what interrupts the chip generates is why I added an extra flag for it. Also, reorder the debug parameter flags according to their perceived usefulness. Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de> Signed-off-by: Jarod Wilson <jwilson@redhat.com>
* firewire: fw-ohci: don't append to AT context when it's not activeJarod Wilson2008-04-18
| | | | | | | | | | | | | | | | | | | | | | I finally tracked down the issues with this JMicron PCI-e card in my possession to a failure to comply with section 7.2.3.2 of the OHCI 1.1 specification (thanks to Kristian for the pointer to illustrate that it is indeed a flaw in this card, not the driver). The controller should simply flush the packets we've appended to its AT queue if a bus reset occurs before they've been transmitted and we'll try again, but something goes wrong and the controller winds up hung. However, we can avoid the problem by simply checking if the IntEvent.busReset register had been set before we try appending to the AT context. When busReset is set, the AT context is completely halted until busReset is cleared, so there's no point in appending AT packets until the register is cleared. So at_context_queue_packet() now checks for busReset being set, and bails with an RCODE_GENERATION packet ack, which results in us trying to append the packet again after recognizing the fact there has been a bus reset, and clearing busReset. Signed-off-by: Jarod Wilson <jwilson@redhat.com> Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
* firewire: fw-ohci: log regAccessFail eventsJarod Wilson2008-04-18
| | | | | | | | | | While trying to debug this piece of crap JMicron PCI-e controller in my possession, one thought was that perhaps I was encountering register access failures. I'm not, but logging them would be good, so we can see if they are a real problem we should be taking into account anywhere in the code. Signed-off-by: Jarod Wilson <jwilson@redhat.com> Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de> (added list contact)
* firewire: fw-ohci: make sure HCControl register LPS bit is setJarod Wilson2008-04-18
| | | | | | | | | | | | | | | I've now witnessed multiple occasions where one of my controllers (a very poorly working JMicron PCIe card) fails to get its registers properly set up in ohci_enable(), apparently due to an occasionally very slow to initiate SClk. The easy fix for this problem is to add a tiny while loop to try again a time or three after initially enabling LPS before we move on (or give up). Of course, the card still isn't fully functional yet, but this gets it at least one tiny step closer... Signed-off-by: Jarod Wilson <jwilson@redhat.com> Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
* firewire: fw-ohci: missing PPC PMac feature calls in failure pathStefan Richter2008-04-18
| | | | | | Balance ohci_pmac_on and ohci_pmac_off if pci_driver.probe fails. Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
* firewire: fw-ohci: untangle a mixed unsigned/signed expressionStefan Richter2008-04-18
| | | | | | and make another expression more readable. Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
* firewire: debug interrupt eventsStefan Richter2008-04-18
| | | | | | | | | | | | | | | | | | | | This adds debug printks for asynchronous transmission and reception and for self ID reception. They can be enabled at module load time, and at runtime via /sys/module/firewire_ohci/parameters/debug. Signed-off-by: Jarod Wilson <jwilson@redhat.com> Also added: Logging of interrupt event codes and of cancelled AT packets. The code now depends on a Kconfig variable. This makes it easier to build firewire-ohci without the feature or to make it an option in the future. The variable is currently hidden and always on. This feature inflates firewire-ohci.ko by 7 kB = 27% on x86-64 and by 4 kB = 23% on i686. Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
* firewire: fw-ohci: catch self_id_count == 0Stefan Richter2008-04-18
| | | | | | | | | | | | | fw_core_handle_bus_reset() incorrectly relied on the assumption that self_id_count > 0. We check early in fw-ohci and discard the self ID complete event if self_id_count == 0 because a valid event always has at least one self ID packet in it (the one of the local node). Hence treat self_id_count == 0 like any other kind of invalid self ID buffer. Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de> Signed-off-by: Jarod Wilson <jwilson@redhat.com>
* firewire: fw-ohci: add self ID error checkStefan Richter2008-04-18
| | | | | | | | | Discard self ID buffer contents if - the selfIDError flag is set, - any of the self ID packets has bit errors. Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de> Signed-off-by: Jarod Wilson <jwilson@redhat.com>
* firewire: fw-ohci: refactor probe, remove, suspend, resumeStefan Richter2008-04-18
| | | | | | Clean up shared code and variable names. Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
* firewire: fw-ohci: switch on bus power after resume on PPC PMacStefan Richter2008-04-18
| | | | | | | | | | | The platform feature calls in the suspend method switched off cable power, but the calls in the resume method did not switch it back on. Add the necessary feature call to .resume. Also add the corresponding call to .suspend to make .suspend's behavior explicitly the same on all PMacs. Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
* firewire: fw-ohci: add option for remote debuggingStefan Richter2008-04-18
| | | | | | | | This way firewire-ohci can be used for remote debugging like ohci1394. Version with amendment from Fri, 11 Apr 2008 00:08:08 +0200. Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de> Acked-by: Bernhard Kaindl <bk@suse.de>
* firewire: fw-sbp2: set dual-phase cycle_limitJarod Wilson2008-04-18
| | | | | | | | | | | | | | | | | Try to write dual-phase retry protocol limits to BUSY_TIMEOUT register. - The dual-phase retry protocol is optional to implement, and if not supported, writes to the dual-phase portion of the register will be ignored. We try to write the original 1394-1995 default here. - In the case of devices that are also SBP-3-compliant, all writes are ignored, as the register is read-only, but contains single-phase retry of 15, which is what we're trying to set for all SBP-2 device anyway, so this write attempt is safe and yields more consistent behavior for all devices. See section 8.3.2.3.5 of the 1394-1995 spec, section 6.2 of the SBP-2 spec, and section 6.4 of the SBP-3 spec for further details. Signed-off-by: Jarod Wilson <jwilson@redhat.com> Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
* firewire: fw-sbp2: reduce log noiseStefan Richter2008-04-18
| | | | | | The block/unblock logic is now sufficiently tested. Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
* firewire: fw-sbp2: remove unnecessary memsetStefan Richter2008-04-18
| | | | | | orb came from kzalloc. Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
* firewire: fw-sbp2: simplify some macrosStefan Richter2008-04-18
| | | | | | How hard can it be to switch on one bit? :-) Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
* firewire: fw-sbp2: remove usages of fw_memcpy_to_be32Stefan Richter2008-04-18
| | | | | | | | Write directly in big endian instead of byte-swapping after the fact. This saves a few conversions, lets gcc use constant endianess conversions where possible, and enables deeper endianess annotation. Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
* firewire: fw-sbp2: relax SCSI DMA alignmentStefan Richter2008-04-18
| | | | Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
* firewire: refactor fw_unit reference countingStefan Richter2008-04-18
| | | | | | | | Add wrappers for getting and putting a unit. Remove some line breaks. Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de> Signed-off-by: Jarod Wilson <jwilson@redhat.com>
* firewire: fw-sbp2: fix reference countingStefan Richter2008-04-18
| | | | | | | | The reference count of the unit dropped too low in an error path in sbp2_probe. Fixed by moving the _get further up. Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de> Signed-off-by: Jarod Wilson <jwilson@redhat.com>
* firewire: remove superfluous reference countingStefan Richter2008-04-18
| | | | | | | | The card->kref became obsolete since patch "firewire: fix crash in automatic module unloading" added another counter of card users. Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de> Signed-off-by: Jarod Wilson <jwilson@redhat.com>
* firewire: fw-ohci: plug dma memory leak in AR handlerJarod Wilson2008-03-27
| | | | | | | | | | | | | | | | | | | There's an ugly little memory leak in firewire-ohci's ar_context_tasklet(), where we're not freeing up some of the memory we use for each ar_buffer, due to a moving pointer. The problem has been there for a while, but didn't get noticed until after converting the AR routines over to use coherent DMA and I started running into I/O stall- outs with the following message output repeatedly to the console: PCI-DMA: Out of IOMMU space for 53248 bytes at device 0000:04:09.0 Plugging this leak is definitely necessary, but unfortunately, isn't the entire answer to my problem, it only increases the amount of I/O that I can do before hitting the problem. Still working on tracking down the root cause.. Signed-off-by: Jarod Wilson <jwilson@redhat.com> Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
* firewire: fix panic in handle_at_packetStefan Richter2008-03-20
| | | | | | | | | | | | | | This fixes a use-after-free bug in the handling of split transactions. The AT DMA handler of the request was occasionally executed after the AR DMA handler of the response. The AT DMA handler then accessed an already freed packet. Reported by Johannes Berg. http://bugzilla.kernel.org/show_bug.cgi?id=9617 Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de> Tested-by: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: Jarod Wilson <jwilson@redhat.com>
* firewire: fw-ohci: shut up false compiler warning on PPC32Stefan Richter2008-03-13
| | | | | | | Shut up "may be used uninitialised in this function" warnings due to PPC32's implementation of dma_alloc_coherent(). Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
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