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2008-08-05remove unneeded #include <linux/ide.h>'sAdrian Bunk
This patch remove unneeded #include <linux/ide.h>'s. It also adds a required #include <linux/interrupt.h> that was previously implicitely pulled by ide.h Signed-off-by: Adrian Bunk <bunk@kernel.org> [bart: revert change to tests/lkdtm.c (spotted by Stephen Rothwell)] Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
2008-08-05ide: fix regression caused by ide_device_{get,put}() addition (take 2)Bartlomiej Zolnierkiewicz
On Monday 28 July 2008, Benjamin Herrenschmidt wrote: [...] > Vector: 300 (Data Access) at [c58b7b80] > pc: c014f264: elv_may_queue+0x10/0x44 > lr: c0152750: get_request+0x2c/0x2c0 > sp: c58b7c30 > msr: 1032 > dar: c > dsisr: 40000000 > current = 0xc58aaae0 > pid = 854, comm = media-bay > enter ? for help > mon> t > [c58b7c40] c0152750 get_request+0x2c/0x2c0 > [c58b7c70] c0152a08 get_request_wait+0x24/0xec > [c58b7cc0] c0225674 ide_cd_queue_pc+0x58/0x1a0 > [c58b7d40] c022672c ide_cdrom_packet+0x9c/0xdc > [c58b7d70] c0261810 cdrom_get_disc_info+0x60/0xd0 > [c58b7dc0] c026208c cdrom_mrw_exit+0x1c/0x11c > [c58b7e30] c0260f7c unregister_cdrom+0x84/0xe8 > [c58b7e50] c022395c ide_cd_release+0x80/0x84 > [c58b7e70] c0163650 kref_put+0x54/0x6c > [c58b7e80] c0223884 ide_cd_put+0x40/0x5c > [c58b7ea0] c0211100 generic_ide_remove+0x28/0x3c > [c58b7eb0] c01e9d34 __device_release_driver+0x78/0xb4 > [c58b7ec0] c01e9e44 device_release_driver+0x28/0x44 > [c58b7ee0] c01e8f7c bus_remove_device+0xac/0xd8 > [c58b7f00] c01e7424 device_del+0x104/0x198 > [c58b7f20] c01e74d0 device_unregister+0x18/0x30 > [c58b7f40] c02121c4 __ide_port_unregister_devices+0x6c/0x88 > [c58b7f60] c0212398 ide_port_unregister_devices+0x38/0x80 > [c58b7f80] c0208ca4 media_bay_step+0x1cc/0x5c0 > [c58b7fb0] c0209124 media_bay_task+0x8c/0xcc > [c58b7fd0] c00485c0 kthread+0x48/0x84 > [c58b7ff0] c0011b20 kernel_thread+0x44/0x60 The guilty commit turned out to be 08da591e14cf87247ec09b17c350235157a92fc3 ("ide: add ide_device_{get,put}() helpers"). ide_device_put() is called before kref_put() in ide_cd_put() so IDE device is already gone by the time ide_cd_release() is reached. Fix it by calling ide_device_get() before kref_get() and ide_device_put() after kref_put() in all affected device drivers. v2: Brown paper bag time. In v1 cd->drive was referenced after dropping last reference on cd object (which could result in OOPS in ide_device_put() as reported/debugged by Mariusz Kozlowski). Fix it by caching cd->drive in the local variable (fix other device drivers too). Reported-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Reported-by: Mariusz Kozlowski <m.kozlowski@tuxland.pl> Cc: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Cc: Borislav Petkov <petkovbb@gmail.com> Tested-by: Mariusz Kozlowski <m.kozlowski@tuxland.pl> Tested-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
2008-08-05remove unnecessary <linux/hdreg.h> includesBartlomiej Zolnierkiewicz
Following files don't need <linux/hdreg.h> at all: - arch/mips/jazz/setup.c - arch/sh/boards/mach-systemh/irq.c - drivers/macintosh/mediabay.c - drivers/scsi/hptiop.c - drivers/usb/storage/freecom.c - arch/powerpc/include/asm/ide.h - init/main.c Cc: Christoph Hellwig <hch@infradead.org> Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
2008-08-05ide: sanitize struct ide_port_ops documentation (take 2)Bartlomiej Zolnierkiewicz
v2: Add missing '@'-s. (Noticed by Randy Dunlap) Cc: Randy Dunlap <randy.dunlap@oracle.com> Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
2008-08-05ide: fix ide_fix_driveid()Bartlomiej Zolnierkiewicz
Fix byte-swapping for id->words161_175[], id->words206_254[] and id->words206_254[]. Luckily all words previously left in little-endian byte-order are marked as reserved so this fix shouldn't affect user-space applications. Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
2008-08-05ide: fix pre-EIDE SWDMA support on big-endianBartlomiej Zolnierkiewicz
id->tDMA is of 'unsigned char' type so endianness is already correct and calling le16_to_cpu() is wrong. Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
2008-08-05Merge branch 'no-ath9k' of ↵David S. Miller
git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless-2.6
2008-08-05bridge: fix compile warning in net/bridge/br_netfilter.cRami Rosen
This patch fixes the following warning due to incompatible pointer assignment: net/bridge/br_netfilter.c: In function 'br_netfilter_rtable_init': net/bridge/br_netfilter.c:116: warning: assignment from incompatible pointer type This warning is due to commit 4adf0af6818f3ea52421dc0bae836cfaf20ef72a from July 30 (send correct MTU value in PMTU (revised)). Signed-off-by: Rami Rosen <ramirose@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-08-05ipv4: remove unused field in struct flowi (include/net/flow.h).Rami Rosen
This patch removes an unused field (flags) from struct flowi; it seems that this "flags" field was used once in the past for multipath routing with FLOWI_FLAG_MULTIPATHOLDROUTE flag (which does no longer exist); however, the "flags" field of struct flowi is not used anymore. Signed-off-by: Rami Rosen <ramirose@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-08-04tg3: Fix 'scheduling while atomic' errorsMatt Carlson
This patch fixes the 'scheduling while atomic' errors introduced by commit 12dac0756d357325b107fe6ec24921ec38661839 ("tg3: adapt tg3 to use reworked PCI PM code"). The first hunk of the patch removes an unnecessary tg3_set_power_state() call. The chip will already be in the D0 state either due to a chip reset or through a previous call to tg3_set_power_state(). The second hunk of the patch moves the tg3_set_power_state() call outside the critical section guarded by tg3_full_lock() and tg3_full_unlock() functions. The power state of the device is and should be outside the lock's domain and all other tg3_set_power_state() calls support this. Signed-off-by: Matt Carlson <mcarlson@broadcom.com> Signed-off-by: Michael Chan <mchan@broadcom.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-08-04net: Kill plain NET_XMIT_BYPASS.David S. Miller
dst_input() was doing something completely absurd, looping on skb->dst->input() if NET_XMIT_BYPASS was seen, but these functions never return such an error. And as a result plain ole' NET_XMIT_BYPASS has no more references and can be completely killed off. Signed-off-by: David S. Miller <davem@davemloft.net>
2008-08-04net_sched: Add qdisc __NET_XMIT_BYPASS flagJarek Poplawski
Patrick McHardy <kaber@trash.net> noticed that it would be nice to handle NET_XMIT_BYPASS by NET_XMIT_SUCCESS with an internal qdisc flag __NET_XMIT_BYPASS and to remove the mapping from dev_queue_xmit(). David Miller <davem@davemloft.net> spotted a serious bug in the first version of this patch. Signed-off-by: Jarek Poplawski <jarkao2@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-08-04net_sched: Add qdisc __NET_XMIT_STOLEN flagJarek Poplawski
Patrick McHardy <kaber@trash.net> noticed: "The other problem that affects all qdiscs supporting actions is TC_ACT_QUEUED/TC_ACT_STOLEN getting mapped to NET_XMIT_SUCCESS even though the packet is not queued, corrupting upper qdiscs' qlen counters." and later explained: "The reason why it translates it at all seems to be to not increase the drops counter. Within a single qdisc this could be avoided by other means easily, upper qdiscs would still increase the counter when we return anything besides NET_XMIT_SUCCESS though. This means we need a new NET_XMIT return value to indicate this to the upper qdiscs. So I'd suggest to introduce NET_XMIT_STOLEN, return that to upper qdiscs and translate it to NET_XMIT_SUCCESS in dev_queue_xmit, similar to NET_XMIT_BYPASS." David Miller <davem@davemloft.net> noticed: "Maybe these NET_XMIT_* values being passed around should be a set of bits. They could be composed of base meanings, combined with specific attributes. So you could say "NET_XMIT_DROP | __NET_XMIT_NO_DROP_COUNT" The attributes get masked out by the top-level ->enqueue() caller, such that the base meanings are the only thing that make their way up into the stack. If it's only about communication within the qdisc tree, let's simply code it that way." This patch is trying to realize these ideas. Signed-off-by: Jarek Poplawski <jarkao2@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-08-04fs: rename buffer trylockNick Piggin
Like the page lock change, this also requires name change, so convert the raw test_and_set bitop to a trylock. Signed-off-by: Nick Piggin <npiggin@suse.de> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-08-04mm: rename page trylockNick Piggin
Converting page lock to new locking bitops requires a change of page flag operation naming, so we might as well convert it to something nicer (!TestSetPageLocked_Lock => trylock_page, SetPageLocked => set_page_locked). This also facilitates lockdeping of page lock. Signed-off-by: Nick Piggin <npiggin@suse.de> Acked-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Acked-by: Peter Zijlstra <peterz@infradead.org> Acked-by: Andrew Morton <akpm@linux-foundation.org> Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-08-04Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-2.6Linus Torvalds
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-2.6: sparc64: Remove all cpumask_t local variables in xcall dispatch. sparc64: Kill error_mask from hypervisor_xcall_deliver(). sparc64: Build cpu list and mondo block at top-level xcall_deliver(). sparc64: Disable local interrupts around xcall_deliver_impl() invocation. sparc64: Make all xcall_deliver's go through common helper function. sparc64: Always allocate the send mondo blocks, even on non-sun4v. sparc64: Make smp_cross_call_masked() take a cpumask_t pointer. sparc64: Directly call xcall_deliver() in smp_start_sync_tick_client. sparc64: Call xcall_deliver() directly in some cases. sparc64: Use cpumask_t pointers and for_each_cpu_mask_nr() in xcall_deliver. sparc64: Use xcall_deliver() consistently. sparc64: Use function pointer for cross-call sending. arch/sparc64/kernel/signal.c: removed duplicated #include sparc64: Need to disable preemption around smp_tsb_sync().
2008-08-04Merge git://git.kernel.org/pub/scm/linux/kernel/git/lethal/sh-2.6Linus Torvalds
* git://git.kernel.org/pub/scm/linux/kernel/git/lethal/sh-2.6: (29 commits) sh: enable maple_keyb in dreamcast_defconfig. SH2(A) cache update nommu: Provide vmalloc_exec(). add addrespace definition for sh2a. sh: Kill off ARCH_SUPPORTS_AOUT and remnants of a.out support. sh: define GENERIC_HARDIRQS_NO__DO_IRQ. sh: define GENERIC_LOCKBREAK. sh: Save NUMA node data in vmcore for crash dumps. sh: module_alloc() should be using vmalloc_exec(). sh: Fix up __bug_table handling in module loader. sh: Add documentation and integrate into docbook build. sh: Fix up broken kerneldoc comments. maple: Kill useless private_data pointer. maple: Clean up maple_driver_register/unregister routines. input: Clean up maple keyboard driver maple: allow removal and reinsertion of keyboard driver module sh: /proc/asids depends on MMU. arch/sh/boards/mach-se/7343/irq.c: removed duplicated #include arch/sh/boards/board-ap325rxa.c: removed duplicated #include sh/boards/Makefile typo fix ...
2008-08-04Merge 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: Remove use of CONFIG_PPC_MERGE powerpc: Force printing of 'total_memory' to unsigned long long powerpc: Fix compiler warning in arch/powerpc/mm/mem.c powerpc: Move include files to arch/powerpc/include/asm
2008-08-04Merge git://git.kernel.org/pub/scm/linux/kernel/git/sam/kbuild-fixesLinus Torvalds
* git://git.kernel.org/pub/scm/linux/kernel/git/sam/kbuild-fixes: kconfig: drop the ""trying to assign nonexistent symbol" warning kconfig: always write out .config
2008-08-04tracehook: kerneldoc fixRoland McGrath
My last change to tracehook.h made it confuse the kerneldoc parser. Move the #define's before the comment so it's happy again. Signed-off-by: Roland McGrath <roland@redhat.com> Acked-by: Randy Dunlap <randy.dunlap@oracle.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-08-04mn10300: Fix up __bug_table handling in module loader.Paul Mundt
Platforms that are using GENERIC_BUG must call in to module_bug_finalize()/module_bug_cleanup() in order to scan modules with their own __bug_table sections that are otherwise unaccounted. Signed-off-by: Paul Mundt <lethal@linux-sh.org> Signed-off-by: David Howells <dhowells@redhat.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-08-04Merge branch 'audit.b56' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/viro/audit-current * 'audit.b56' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/audit-current: Re: [PATCH] Fix the kernel panic of audit_filter_task when key field is set
2008-08-04Merge git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi-rc-fixes-2.6Linus Torvalds
* git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi-rc-fixes-2.6: [SCSI] scsi_transport_spi: fix oops in revalidate [SCSI] ses: fix VPD inquiry overrun [SCSI] block: Fix miscalculation of sg_io timeout in CDROM_SEND_PACKET handler. [SCSI] hptiop: add more PCI device IDs
2008-08-04m68k: some asm-sparc include files movedStephen Rothwell
So copy their contents into the asm-m68k files. Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-08-04__sched_setscheduler: don't do any policy checks when not "user"Jeremy Fitzhardinge
The "user" parameter to __sched_setscheduler indicates whether the change is being done on behalf of a user process or not. If not, we shouldn't apply any permissions checks, so don't call security_task_setscheduler(). Signed-off-by: Jeremy Fitzhardinge <jeremy@goop.org> Tested-by: Steve Wise <swise@opengridcomputing.com> Cc: Rusty Russell <rusty@rustcorp.com.au> Cc: "Rafael J. Wysocki" <rjw@sisk.pl> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-08-04Merge 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] move include/asm-s390 to arch/s390/include/asm
2008-08-04Merge git://git.kernel.org/pub/scm/linux/kernel/git/brodo/pcmcia-fixes-2.6Linus Torvalds
* git://git.kernel.org/pub/scm/linux/kernel/git/brodo/pcmcia-fixes-2.6: pcmcia: rsrc_nonstatic: check value, not pointer
2008-08-04sc1200 watchdog driver: Fix locking, sems and coding styleAlan Cox
Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Alan Cox <alan@redhat.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-08-04alpha: Fix breakage in wdt_pciAndrew Morton
drivers/watchdog/wdt_pci.c: In function 'wdtpci_ctr_mode': drivers/watchdog/wdt_pci.c:120: error: implicit declaration of function 'udelay' {standard input}: Assembler messages: Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Alan Cox <alan@redhat.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-08-04wdt: Cleanup and sort out locking and inb_pAlan Cox
Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Alan Cox <alan@redhat.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-08-04s3c2410_wdt watchdog driver: Locking and coding styleAlan Cox
Kill off use of semaphores. Fix ioctl races and locking holes. From: Alan Cox <alan@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Alan Cox <alan@redhat.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-08-04it8712f_wdt: Locking and coding styleAlan Cox
Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Alan Cox <alan@redhat.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-08-04ar7_wdt watchdog driver: Fix lockingAlan Cox
Use unlocked_ioctl Remove semaphores Signed-off-by: Alan Cox <alan@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-08-04vt: Deadlock workaroundAlan Cox
2.6.26 corrected the mutex locking on tty resizing to fix the case where you could get the tty/vt sizing out of sync. That turns out to have a deadlock. The actual fix is really major and I've got it lined up as part of the ops changes for 2.6.28 so for 2.6.26/2.6.27 it is safer to reintroduce this ages old minor bug. Signed-off-by: Alan Cox <alan@redhat.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-08-04cris: Fixup compile problemsAlan Cox
It now compiles with the tty changes but isn't tested (which has to be better than not compiling.. Closes bug #11218 Signed-off-by: Alan Cox <alan@redhat.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-08-04blackfin: Fix compile failure in tty codeAlan Cox
Blackfin peers into the ldisc in an odd way for IRDA snooping which therefore got missed. Simple enough fix. Closes bug #11233 Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-08-04Merge git://git.infradead.org/users/dwmw2/random-2.6Linus Torvalds
* git://git.infradead.org/users/dwmw2/random-2.6: drivers/video/console/promcon.c: fix build error Fix IHEX firmware generation/loading
2008-08-04sound: ensure device number is valid in snd_seq_oss_synth_make_infoWilly Tarreau
snd_seq_oss_synth_make_info() incorrectly reports information to userspace without first checking for the validity of the device number, leading to possible information leak (CVE-2008-3272). Reported-By: Tobias Klein <tk@trapkit.de> Acked-and-tested-by: Takashi Iwai <tiwai@suse.de> Cc: stable@kernel.org Signed-off-by: Willy Tarreau <w@1wt.eu> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-08-04Merge git://git.kernel.org/pub/scm/linux/kernel/git/kkeil/ISDN-2.6Linus Torvalds
* git://git.kernel.org/pub/scm/linux/kernel/git/kkeil/ISDN-2.6: Add DIP switch readout for HFC-4S IOB4ST Fix remaining big endian issue of hfcmulti mISDN cleanup user interface mISDN fix main ISDN Makefile
2008-08-04drivers/char/efirtc.c: removed duplicated #includeHuang Weiyi
Removed duplicated include <linux/smp_lock.h> in drivers/char/efirtc.c. Signed-off-by: Huang Weiyi <weiyi.huang@gmail.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-08-04mlock() fix return valuesKOSAKI Motohiro
Halesh says: Please find the below testcase provide to test mlock. Test Case : =========================== #include <sys/resource.h> #include <stdio.h> #include <sys/stat.h> #include <sys/types.h> #include <unistd.h> #include <sys/mman.h> #include <fcntl.h> #include <errno.h> #include <stdlib.h> int main(void) { int fd,ret, i = 0; char *addr, *addr1 = NULL; unsigned int page_size; struct rlimit rlim; if (0 != geteuid()) { printf("Execute this pgm as root\n"); exit(1); } /* create a file */ if ((fd = open("mmap_test.c",O_RDWR|O_CREAT,0755)) == -1) { printf("cant create test file\n"); exit(1); } page_size = sysconf(_SC_PAGE_SIZE); /* set the MEMLOCK limit */ rlim.rlim_cur = 2000; rlim.rlim_max = 2000; if ((ret = setrlimit(RLIMIT_MEMLOCK,&rlim)) != 0) { printf("Cant change limit values\n"); exit(1); } addr = 0; while (1) { /* map a page into memory each time*/ if ((addr = (char *) mmap(addr,page_size, PROT_READ | PROT_WRITE,MAP_SHARED,fd,0)) == MAP_FAILED) { printf("cant do mmap on file\n"); exit(1); } if (0 == i) addr1 = addr; i++; errno = 0; /* lock the mapped memory pagewise*/ if ((ret = mlock((char *)addr, 1500)) == -1) { printf("errno value is %d\n", errno); printf("cant lock maped region\n"); exit(1); } addr = addr + page_size; } } ====================================================== This testcase results in an mlock() failure with errno 14 that is EFAULT, but it has nowhere been specified that mlock() will return EFAULT. When I tested the same on older kernels like 2.6.18, I got the correct result i.e errno 12 (ENOMEM). I think in source code mlock(2), setting errno ENOMEM has been missed in do_mlock() , on mlock_fixup() failure. SUSv3 requires the following behavior frmo mlock(2). [ENOMEM] Some or all of the address range specified by the addr and len arguments does not correspond to valid mapped pages in the address space of the process. [EAGAIN] Some or all of the memory identified by the operation could not be locked when the call was made. This rule isn't so nice and slighly strange. but many people think POSIX/SUS compliance is important. Reported-by: Halesh Sadashiv <halesh.sadashiv@ap.sony.com> Tested-by: Halesh Sadashiv <halesh.sadashiv@ap.sony.com> Signed-off-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Cc: <stable@kernel.org> [2.6.25.x, 2.6.26.x] Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-08-04atmel_spi: fix hang due to missed interruptGerard Kam
For some time my at91sam9260 board with JFFS2 on serial flash (m25p80) would hang when accessing the serial flash and SPI bus. Slowing the SPI clock down to 9 MHz reduced the occurrence of the hang from "always" during boot to a nuisance level that allowed other SW development to continue. Finally had to address this issue when an application stresses the I/O to always cause a hang. Hang seems to be caused by a missed SPI interrupt, so that the task ends up waiting forever after calling spi_sync(). The fix has 2 parts. First is to halt the DMA engine before the "current" PDC registers are loaded. This ensures that the "next" registers are loaded before the DMA operation takes off. The second part of the fix is a kludge that adds a "completion" interrupt in case the ENDRX interrupt for the last segment of the DMA chaining operation was missed. The patch allows the SPI clock for the serial flash to be increased from 9 MHz to 15 MHz (or more?). No hangs or SPI overruns were encountered. Haavard: while this patch does indeed improve things, I still see overruns and CRC errors on my NGW100 board when running the DataFlash at 10 MHz. However, I think some improvement is better than nothing, so I'm passing this on for inclusion in 2.6.27. Signed-off-by: Gerard Kam <gerardk5@verizon.net> Signed-off-by: Haavard Skinnemoen <haavard.skinnemoen@atmel.com> Cc: David Brownell <david-b@pacbell.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-08-04spi: S3C24XX: reset register status on resume.Ben Dooks
Fix a bug in the spi_s3c24xx driver where it does not reset the registers of the hardware when resuming from suspend (this block has been reset over suspend). Signed-off-by: Ben Dooks <ben-linux@fluff.org> Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-08-04sparc64: Remove all cpumask_t local variables in xcall dispatch.David S. Miller
All of the xcall delivery implementation is cpumask agnostic, so we can pass around pointers to const cpumask_t objects everywhere. The sad remaining case is the argument to arch_send_call_function_ipi(). Signed-off-by: David S. Miller <davem@davemloft.net>
2008-08-04Revert "UFS: add const to parser token table"Linus Torvalds
This reverts commit f9247273cb69ba101877e946d2d83044409cc8c5 (and fb2e405fc1fc8b20d9c78eaa1c7fd5a297efde43 - "fix fs/nfs/nfsroot.c compilation" - that fixed a missed conversion). The changes cause problems for at least the sparc build. Let's re-do them when the exact issues are resolved. Requested-by: Andrew Morton <akpm@linux-foundation.org> Requested-by: Steven Whitehouse <swhiteho@redhat.com> Cc: David Miller <davem@davemloft.net> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-08-04sparc64: Kill error_mask from hypervisor_xcall_deliver().David S. Miller
It can eat up a lot of stack space when NR_CPUS is large. We retain some of it's functionality by reporting at least one of the cpu's which are seen in error state. Signed-off-by: David S. Miller <davem@davemloft.net>
2008-08-04sparc64: Build cpu list and mondo block at top-level xcall_deliver().David S. Miller
Then modify all of the xcall dispatch implementations get passed and use this information. Now all of the xcall dispatch implementations do not need to be mindful of details such as "is current cpu in the list?" and "is cpu online?" Signed-off-by: David S. Miller <davem@davemloft.net>
2008-08-04Revert "[SCSI] extend the last_sector_bug flag to cover more sectors"Linus Torvalds
This reverts commit 2b142900784c6e38c8d39fa57d5f95ef08e735d8, since it seems to break some other USB storage devices (at least a JMicron USB to ATA bridge). As such, while it apparently fixes some cardreaders, it would need to be made conditional on the exact reader it fixes in order to avoid causing regressions. Cc: Alan Jenkins <alan-jenkins@tuffmail.co.uk> Cc: James Bottomley <James.Bottomley@HansenPartnership.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-08-04sparc64: Disable local interrupts around xcall_deliver_impl() invocation.David S. Miller
Signed-off-by: David S. Miller <davem@davemloft.net>
2008-08-04sparc64: Make all xcall_deliver's go through common helper function.David S. Miller
This just facilitates the next changeset where we'll be building the cpu list and mondo block in this helper function. Signed-off-by: David S. Miller <davem@davemloft.net>