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2008-06-04Merge branch 'master' of ↵David S. Miller
master.kernel.org:/pub/scm/linux/kernel/git/linville/wireless-2.6
2008-06-04USB ID for Philips CPWUA054/00 Wireless USB Adapter 11gFelix Homann
Enable the Philips CPWUA054/00 in p54usb. Cc: Jeff Garzik <jeff@garzik.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: John W. Linville <linville@tuxdriver.com>
2008-06-04ssb: Fix context assertion in ssb_pcicore_dev_irqvecs_enableMichael Buesch
This fixes a context assertion in ssb that makes b44 print out warnings on resume. This fixes the following kernel oops: http://www.kerneloops.org/oops.php?number=12732 http://www.kerneloops.org/oops.php?number=11410 Signed-off-by: Michael Buesch <mb@bu3sch.de> Signed-off-by: John W. Linville <linville@tuxdriver.com>
2008-06-04libertas: fix command size for CMD_802_11_SUBSCRIBE_EVENTHolger Schurig
The size was two small by two bytes. Signed-off-by: Holger Schurig Signed-off-by: John W. Linville <linville@tuxdriver.com>
2008-06-04ipw2200: expire and use oldest BSS on adhoc createDan Williams
If there are no networks on the free list, expire the oldest one when creating a new adhoc network. Because ipw2200 and the ieee80211 stack don't actually cull old networks and place them back on the free list unless they are needed for new probe responses, over time the free list would become empty and creating an adhoc network would fail due to the ! list_empty(...) check. Signed-off-by: Dan Williams <dcbw@redhat.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
2008-06-04airo warning fixAndrew Morton
WARNING: space prohibited between function name and open parenthesis '(' #22: FILE: drivers/net/wireless/airo.c:2907: + while ((IN4500 (ai, COMMAND) & COMMAND_BUSY) && (delay < 10000)) { total: 0 errors, 1 warnings, 8 lines checked ./patches/wireless-airo-waitbusy-wont-delay.patch has style problems, please review. If any of these errors are false positives report them to the maintainer, see CHECKPATCH in MAINTAINERS. Please run checkpatch prior to sending patches Cc: Dan Williams <dcbw@redhat.com> Cc: Roel Kluin <roel.kluin@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: John W. Linville <linville@tuxdriver.com>
2008-06-04b43legacy: Fix controller restart crashMichael Buesch
This fixes a kernel crash on rmmod, in the case where the controller was restarted before doing the rmmod. Signed-off-by: Michael Buesch <mb@bu3sch.de> Signed-off-by: John W. Linville <linville@tuxdriver.com>
2008-06-04sunhme: Cleanup use of deprecated calls to save_and_cli and restore_flags.Mark Asselstine
Make use of local_irq_save and local_irq_restore rather then the deprecated save_and_cli and restore_flags calls. Signed-off-by: Mark Asselstine <mark.asselstine@windriver.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-06-04Merge branch 'davem-fixes' of ↵David S. Miller
master.kernel.org:/pub/scm/linux/kernel/git/jgarzik/netdev-2.6
2008-06-02Merge branch 'for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/cooloney/blackfin-2.6 * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/cooloney/blackfin-2.6: 8250 Serial Driver: revert extra IRQ flag definition patch Blackfin arch: update anomaly headers from toolchain trunk Blackfin arch: Remove bad and usless code Blackfin arch: Fix bug - set corret SSEL and IRQ to enable AD7877 on BF527 Blackfin arch: Fix typo. it should be _outsw_8 Blackfin arch: Cleanup no functional changes
2008-06-02Merge branch 'merge' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc * 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc: [POWERPC] Fix DMA nodes in the MPC8610 HPCD device tree [POWERPC] Export empty_zero_page and copy_page in arch/ppc [POWERPC] Add "memory" clobber to MMIO accessors [POWERPC] pasemi: update pasemi_defconfig, enable electra_cf electra_cf: Add MODULE_DEVICE_TABLE()
2008-05-318250 Serial Driver: revert extra IRQ flag definition patchBryan Wu
As Russell pointed out, original patch will break some serial configurations because of the dependency of the <asm/serial.h> header file. Revert it first and try to find out other solution later Cc: Javier Herrero <jherrero@hvsistemas.es> Cc: Alan Cox <alan@lxorguk.ukuu.org.uk> Cc: Russell King <rmk+lkml@arm.linux.org.uk> Signed-off-by: Bryan Wu <cooloney@kernel.org>
2008-05-30[netdrvr] tulip: oops in tulip_interrupt when hibernating with swsusp/suspend2Grant Grundler
The following patch is seems to fix the tulip suspend/resume panic: http://bugzilla.kernel.org/show_bug.cgi?id=8952#c46 My attempts at a cleaner patch failed and Pavel thinks this is OK. Original from: kernelbugs@tap.homeip.net Signed-off-by: Grant Grundler <grundler@parisc-linux.org> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
2008-05-30atl1: fix 4G memory corruption bugAlexey Dobriyan
When using 4+ GB RAM and SWIOTLB is active, the driver corrupts memory by writing an skb after the relevant DMA page has been unmapped. Although this doesn't happen when *not* using bounce buffers, clearing the pointer to the DMA page after unmapping it fixes the problem. http://marc.info/?t=120861317000005&r=2&w=2 Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> Signed-off-by: Jay Cliburn <jacliburn@bellsouth.net> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
2008-05-30ucc_geth_ethtool: Add a missing HW stats counterLi Yang
Signed-off-by: Joakim Tjernlund <Joakim.Tjernlund@transmode.se> Signed-off-by: Li Yang <leoli@freescale.com> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
2008-05-30ucc_geth_ethtool: Fix typoJoakim Tjernlund
Signed-off-by: Joakim Tjernlund <Joakim.Tjernlund@transmode.se> Signed-off-by: Li Yang <leoli@freescale.com> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
2008-05-30virtio: fix delayed xmit of packet and freeing of old packets.Rusty Russell
Because we cache the last failed-to-xmit packet, if there are no packets queued behind that one we may never send it (reproduced here as TCP stalls, "cured" by an outgoing ping). Cc: Mark McLoughlin <markmc@redhat.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
2008-05-30virtio: fix virtio_net xmit of freed skb bugRusty Russell
If we fail to transmit a packet, we assume the queue is full and put the skb into last_xmit_skb. However, if more space frees up before we xmit it, we loop, and the result can be transmitting the same skb twice. Fix is simple: set skb to NULL if we've used it in some way, and check before sending. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
2008-05-30myri10ge: update driver versionBrice Goglin
Update myri10ge version to 1.3.99-1.347. Signed-off-by: Brice Goglin <brice@myri.com> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
2008-05-30sc92031: remove bogus unlikely()Cesar Eduardo Barros
Commit 5a0a92e67b5009a71e011658da04fb92dad8961f mentions len < ETH_ZLEN is true for ARP packets. This obviously is not unlikely. Signed-off-by: Cesar Eduardo Barros <cesarb@cesarb.net> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
2008-05-30[netdrvr] CS89X0: Add cleanup for dma after failWang Chen
After request_dma() succeeding, any error path should do free_dma(). Signed-off-by: Wang Chen <wangchen@cn.fujitsu.com> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
2008-05-30[netdrvr] sfc: Report XAUI link down at default log levelBen Hutchings
This is normal when the external link is down so don't report it as an error. Signed-off-by: Ben Hutchings <bhutchings@solarflare.com> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
2008-05-30Merge branch 'upstream-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/jgarzik/libata-dev * 'upstream-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jgarzik/libata-dev: ahci: change the Device IDs of nvidia MCP7B AHCI controller in ahci.c [libata] sata_fsl: Fix broken driver, add port multiplier (PMP) support libata: SRST can't be trusted on PMP sil3726 libata: fix libata-scsi kernel-doc notation ata: Convert to static DEFINE_SPINLOCK(lock) ata_piix: fix macbook ich8m problems sata_mv: implement SoC guideline SATA_S11 sata_mv: workaround for 60x1 errata sata13 sata_mv: nuke unreleased GenIIe revisions sata_mv: PHY_MODEx errata fixes sata_mv: move SOC_FLAG to hpriv
2008-05-30Merge git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux-2.6-for-linusLinus Torvalds
* git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux-2.6-for-linus: lguest: notify on empty virtio: force callback on empty. virtio_blk: fix endianess annotations virtio_config: fix len calculation of config elements virtio_net: another race with virtio_net and enable_cb virtio: An entropy device, as suggested by hpa. virtio_blk: allow read-only disks lguest: fix ugly <NULL> in /proc/interrupts virtio: set device index in common code. virtio: virtio_pci should not set bus_id. virtio: bus_id for devices should contain 'virtio' Fix crash in virtio_blk during modprobe ; rmmod ; modprobe lguest: use ioremap_cache, not ioremap
2008-05-30Merge branch 'for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/jbarnes/pci-2.6 * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jbarnes/pci-2.6: PCI: fix rpadlpar pci hotplug driver sysfs usage
2008-05-30Merge branch 'for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input: Input: rename SW_RADIO to SW_RFKILL_ALL Input: gtco - fix double kfree in error handling path Input: pxa27x_keypad - miscellaneous fixes Input: atkbd - mark keyboard as disabled when suspending/unloading Input: apanel - remove duplicate include Input: wm9713 - support five wire panels Input: wm97xx-core - fix race on PHY init Input: wm97xx-core - fix driver name Input: wm97xx-core - report a phys for WM97xx touchscreens Input: i8042 - make sure Dritek quirk is invoked at resume Input: i8042 - add Dritek quirk for Acer TravelMate 660
2008-05-30drivers/watchdog/geodewdt.c: build fixIngo Molnar
* Wim Van Sebroeck <wim@iguana.be> wrote: > Author: Jordan Crouse <jordan.crouse@amd.com> > Date: Mon Jan 21 10:07:00 2008 -0700 > > [WATCHDOG] Add a watchdog driver based on the CS5535/CS5536 MFGPT timers -tip testing found the following build failure on latest -git: drivers/watchdog/geodewdt.c: In function 'geodewdt_probe': drivers/watchdog/geodewdt.c:225: error: too many arguments to function 'geode_mfgpt_alloc_timer' make[1]: *** [drivers/watchdog/geodewdt.o] Error 1 make: *** [drivers/watchdog/geodewdt.o] Error 2 with this config: http://redhat.com/~mingo/misc/config-Fri_May_30_15_19_52_CEST_2008.bad find the fix below. Signed-off-by: Ingo Molnar <mingo@elte.hu> Acked-by: Jordan Crouse <jordan.crouse@amd.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-05-30PCI: fix rpadlpar pci hotplug driver sysfs usageBenjamin Herrenschmidt
When Greg "fixed" the sysfs usage of that driver a while back, he seem to have introduced a bug where the quotes are added around the name of our specific sysfs files, thus breaking the user space tool. This fixes it. Tested DLPAR operations on a POWER6 machine successfully. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
2008-05-30ahci: change the Device IDs of nvidia MCP7B AHCI controller in ahci.cpeerchen
Change the partial Device IDs of nvidia MCP7B AHCI controller in ahci.c, as the actual PCI IDs deployed in the field differed from the forecasted ones preemptively placed in the driver. Signed-off-by: Peer Chen <peerchen@gmail.com> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
2008-05-30[libata] sata_fsl: Fix broken driver, add port multiplier (PMP) supportAshish Kalra
The following commit (4c9bf4e799ce06a7378f1196587084802a414c03): libata: replace tf_read with qc_fill_rtf for non-SFF drivers Broke the sata_fsl.c driver in 2.6.26-rc. I know the following patch fixes the issue, it clearly also adds port multipler support. The current 2.6.26-rc driver is broken. On boot with debug enabled we get something like (w/o this patch): spurious interrupt!!, CC = 0x1 interrupt status 0x1 xx_scr_read, reg_in = 1 spurious interrupt!!, CC = 0x1 interrupt status 0x1 xx_scr_read, reg_in = 1 spurious interrupt!!, CC = 0x1 interrupt status 0x1 xx_scr_read, reg_in = 1 .. continues for ever. This change fixes this as a side effect of adding port multiplier support. Signed-off-by: Ashish Kalra <ashish.kalra@freescale.com> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
2008-05-30libata: SRST can't be trusted on PMP sil3726Tejun Heo
As in sil4726, SRST can't be trusted on sil3726 causing detection problems under certain configuraitons. I thought it was from the Config Disk device but apparently not. Signed-off-by: Tejun Heo <htejun@gmail.com> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
2008-05-30libata: fix libata-scsi kernel-doc notationRandy Dunlap
Fix libata-scsi kernel-doc notation: Warning(linux-2.6.25-git15//drivers/ata/libata-scsi.c:1659): No description found for parameter 'cmd' Warning(linux-2.6.25-git15//drivers/ata/libata-scsi.c:1971): No description found for parameter 'buf' Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
2008-05-30ata: Convert to static DEFINE_SPINLOCK(lock)Pradeep Singh Rautela
Replace deprecated static spinlock_t instance to static DEFINE_SPINLOCK(lock). Signed-off-by: Pradeep Singh <rautelap@gmail.com> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
2008-05-30ata_piix: fix macbook ich8m problemsTejun Heo
ICH8M on macbooks are peculiar in that some of them lock up when the second port is enabled, some return bogus values on SIDPR access while yet others hang on SIDPR access. Also, the ich8m_apple_sata entry was wrongly added below generic ich8m entry making it virtually useless. This patch works around macbook ich8m problems by * moving ich8m_apple_sata entry above generic ich8m entry * dropping PIIX_FLAG_SIDPR from ich8m_apple_sata * adding subsystem 106b:00a1 as ich8m_apple_sata Reported and tested by MATSUBAYASHI. Signed-off-by: Tejun Heo <htejun@gmail.com> Cc: MATSUBAYASHI 'Shaolin' Kohji <shaolin@rhythmaning.org> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
2008-05-30sata_mv: implement SoC guideline SATA_S11Mark Lord
The 5182 System-On-Chip (SOC) variant wants certain lower bits to be cleared on any write to the PHY_MODE3 register. If/when support is added for other SOC variants, we'll need some way to uniquely identify the 5182, and not perform this workaround for the others. But for now, it is the only SOC variant we support here. Signed-off-by: Mark Lord <mlord@pobox.com> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
2008-05-30sata_mv: workaround for 60x1 errata sata13Mark Lord
The "B2" variant of the 6041/6081 (genII) chips requires that the PHY_MODE3 register be rewritten after any write to PHY_MODE4. This fixes a regression introduced by an earlier patch. Signed-off-by: Mark Lord <mlord@pobox.com> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
2008-05-30sata_mv: nuke unreleased GenIIe revisionsMark Lord
The only public release of the 6042/7042 chips was/is revision "B0". Remove code that attempted to deal with earlier, non-released revs. This matches the logic of the current Marvell "proprietary" driver. Also, bump up the sata_mv version number, to reflect this batch of erratas. Signed-off-by: Mark Lord <mlord@pobox.com> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
2008-05-30sata_mv: PHY_MODEx errata fixesMark Lord
Fix and update the errata handling for the PHY_MODEx registers. This improves receiver noise tolerance, among other things. Signed-off-by: Mark Lord <mlord@pobox.com> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
2008-05-30sata_mv: move SOC_FLAG to hprivMark Lord
Convert the System-on-Chip flag from a host flag to an hpriv flag, for better consistency with other chip-rev flags, and for easier use in errata fixes etc. Also change the related "HAS_PCI()" into "!IS_SOC()" for better consistency of naming/use (everything else SOC-related already uses "SOC"). There are no functionality changes in this patch. Signed-off-by: Mark Lord <mlord@pobox.com> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
2008-05-30Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6Linus Torvalds
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6: (26 commits) llc: Fix double accounting of received packets netfilter: nf_conntrack_expect: fix error path unwind in nf_conntrack_expect_init() bluetooth: fix locking bug in the rfcomm socket cleanup handling mac80211: fix alignment issue with compare_ether_addr() mac80211: Fix for NULL pointer dereference in sta_info_get() mac80211: fix a typo in ieee80211_handle_filtered_frame comment rndis_wlan: add missing range check for power_output modparam iwlwifi: fix rate scale TLC column selection bug iwlwifi: fix exit from stay_in_table state rndis_wlan: Make connections to TKIP PSK networks work mac80211 : Fixes the status message for iwconfig rt2x00: Use atomic interface iteration in irq context rt2x00: Reset antenna RSSI after switch rt2x00: Don't count retries as failure rt2x00: Fix memleak in tx() path mac80211: reorder channel and freq reporting in wext scan report b43: Fix controller restart crash mac80211: fix ieee80211_rx_bss_put/get imbalance net/mac80211: always true conditionals b43: Upload both beacon templates on initial load ...
2008-05-30Merge branch 'for-linus' of git://git390.osdl.marist.edu/pub/scm/linux-2.6Linus Torvalds
* 'for-linus' of git://git390.osdl.marist.edu/pub/scm/linux-2.6: [S390] Update default configuration. [S390] disassembler: fix idte instruction format. [S390] tape: fix race with stack local wait_queue_head_t. [S390] 3270: fix race with stack local wait_queue_head_t. [S390] dasd: use a generic wait_queue for sleep_on [S390] sclp_vt220: fix scheduling while atomic bug. [S390] showmem: Only walk spanned pages. [S390] appldata: prevent cpu hotplug when walking cpu_online_map. [S390] Fix section mismatch warnings. [S390] s390 types: make dma_addr_t 64 bit capable [S390] tape: Fix race condition in tape block device driver [S390] fix sparsemem related compile error with allnoconfig on s390
2008-05-30acpi: fix sparse const errorsHarvey Harrison
In this case we want a constant pointer to constant chars: drivers/misc/thinkpad_acpi.c:3824:19: error: Just how const do you want this type to be? Like the error says. drivers/misc/thinkpad_acpi.c:3863:19: error: Just how const do you want this type to be? drivers/misc/thinkpad_acpi.c:3864:19: error: Just how const do you want this type to be? drivers/misc/thinkpad_acpi.c:3865:19: error: Just how const do you want this type to be? drivers/misc/thinkpad_acpi.c:3866:19: error: Just how const do you want this type to be? Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com> Acked-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-05-30Input: gtco - fix double kfree in error handling pathDmitry Torokhov
The code would try to free 'report' twice upon input_register_device() failure. Reported-by: Julia Lawall <julia@diku.dk> Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
2008-05-30[S390] tape: fix race with stack local wait_queue_head_t.Martin Schwidefsky
A wait_event call with a stack local wait_queue_head_t structure that is used to do the wake up for the wait_event is inherently racy. After the wait_event finished the wake_up call might not have completed yet. Replace the stack local wait_queue_head_t in tape_do_io and tape_do_io_interruptible with a per device wait queue. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2008-05-30[S390] 3270: fix race with stack local wait_queue_head_t.Martin Schwidefsky
A wait_event call with a stack local wait_queue_head_t structure that is used to do the wake up for the wait_event is inherently racy. After the wait_event finished the wake_up call might not have completed yet. Remove the stack local wait_queue_head_t from raw3270_start_init and use the global raw3270_wait_queue instead. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2008-05-30[S390] dasd: use a generic wait_queue for sleep_onStefan Haberland
Use a generic wait_queue to prevent the wait_queue in dasd_sleep_on_ functions from being referenced by callback_data while it does not exist any more. Signed-off-by: Stefan Haberland <stefan.haberland@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2008-05-30[S390] sclp_vt220: fix scheduling while atomic bug.Heiko Carstens
The driver incorrectly assumed that putchar will only be called from schedulable process context and therefore blocked and waited if no free output buffers where available. Since putchar may also be called from BH context this may lead to deadlocks. To fix this just return the number of characters accepted and let the upper layer handle the rest. The console write function will busy wait (sclp_sync_wait) until a buffer is available again. Cc: Peter Oberparleiter <peter.oberparleiter@de.ibm.com> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2008-05-30[S390] Fix section mismatch warnings.Heiko Carstens
This fixes the last remaining section mismatch warnings in s390 architecture code. It reveals also a real bug introduced by... me with git commit 2069e978d5a6e7b45d58027e3de7f879b8c5e488 ("[S390] sparsemem vmemmap: initialize memmap.") Calling the generic vmemmap_alloc_block() function to get initialized memory is a nice idea, however that function is __meminit annotated and therefore the function might be gone if we try to call it later. This can happen if a DCSS segment gets added. So basically revert the patch and clear the memmap explicitly to fix the original bug. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2008-05-30[S390] tape: Fix race condition in tape block device driverMichael Holzheu
Due to incorrect function call sequence it can happen that a tape block request is finished before the request is taken from the block request queue. The following sequence leads to that condition: * tapeblock_start_request() -> start CCW program * Request finishes -> IO interrupt * tapeblock_end_request() * end_that_request_last() If blkdev_dequeue_request() has not been called before end_that_request_last(), a kernel bug is triggered in end_that_request_last() because the request is still queued. To solve that problem blkdev_dequeue_request() has to be called before starting the CCW program. Signed-off-by: Michael Holzheu <holzheu@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2008-05-30virtio: force callback on empty.Rusty Russell
virtio allows drivers to suppress callbacks (ie. interrupts) for efficiency (no locking, it's just an optimization). There's a similar mechanism for the host to suppress notifications coming from the guest: in that case, we ignore the suppression if the ring is completely full. It turns out that life is simpler if the host similarly ignores callback suppression when the ring is completely empty: the network driver wants to free up old packets in a timely manner, and otherwise has to use a timer to poll. We have to remove the code which ignores interrupts when the driver has disabled them (again, it had no locking and hence was unreliable anyway). Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
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