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2014-08-28block,scsi: fixup blk_get_request dead queue scenariosJoe Lawrence1-2/+2
The blk_get_request function may fail in low-memory conditions or during device removal (even if __GFP_WAIT is set). To distinguish between these errors, modify the blk_get_request call stack to return the appropriate ERR_PTR. Verify that all callers check the return status and consider IS_ERR instead of a simple NULL pointer check. For consistency, make a similar change to the blk_mq_alloc_request leg of blk_get_request. It may fail if the queue is dead, or the caller was unwilling to wait. Signed-off-by: Joe Lawrence <joe.lawrence@stratus.com> Acked-by: Jiri Kosina <jkosina@suse.cz> [for pktdvd] Acked-by: Boaz Harrosh <bharrosh@panasas.com> [for osd] Reviewed-by: Jeff Moyer <jmoyer@redhat.com> Signed-off-by: Jens Axboe <axboe@fb.com>
2014-06-11Merge branch 'for-linus' of git://git.kernel.dk/linux-blockLinus Torvalds1-1/+1
Pull block layer fixes from Jens Axboe: "Final small batch of fixes to be included before -rc1. Some general cleanups in here as well, but some of the blk-mq fixes we need for the NVMe conversion and/or scsi-mq. The pull request contains: - Support for not merging across a specified "chunk size", if set by the driver. Some NVMe devices perform poorly for IO that crosses such a chunk, so we need to support it generically as part of request merging avoid having to do complicated split logic. From me. - Bump max tag depth to 10Ki tags. Some scsi devices have a huge shared tag space. Before we failed with EINVAL if a too large tag depth was specified, now we truncate it and pass back the actual value. From me. - Various blk-mq rq init fixes from me and others. - A fix for enter on a dying queue for blk-mq from Keith. This is needed to prevent oopsing on hot device removal. - Fixup for blk-mq timer addition from Ming Lei. - Small round of performance fixes for mtip32xx from Sam Bradshaw. - Minor stack leak fix from Rickard Strandqvist. - Two __init annotations from Fabian Frederick" * 'for-linus' of git://git.kernel.dk/linux-block: block: add __init to blkcg_policy_register block: add __init to elv_register block: ensure that bio_add_page() always accepts a page for an empty bio blk-mq: add timer in blk_mq_start_request blk-mq: always initialize request->start_time block: blk-exec.c: Cleaning up local variable address returnd mtip32xx: minor performance enhancements blk-mq: ->timeout should be cleared in blk_mq_rq_ctx_init() blk-mq: don't allow queue entering for a dying queue blk-mq: bump max tag depth to 10K tags block: add blk_rq_set_block_pc() block: add notion of a chunk size for request merging
2014-06-06cdrom: convert use of typedef ctl_table to struct ctl_tableJoe Perches1-5/+5
This typedef is unnecessary and should just be removed. Signed-off-by: Joe Perches <joe@perches.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2014-06-06block: add blk_rq_set_block_pc()Jens Axboe1-1/+1
With the optimizations around not clearing the full request at alloc time, we are leaving some of the needed init for REQ_TYPE_BLOCK_PC up to the user allocating the request. Add a blk_rq_set_block_pc() that sets the command type to REQ_TYPE_BLOCK_PC, and properly initializes the members associated with this type of request. Update callers to use this function instead of manipulating rq->cmd_type directly. Includes fixes from Christoph Hellwig <hch@lst.de> for my half-assed attempt. Signed-off-by: Jens Axboe <axboe@fb.com>
2014-05-05cdrom: Remove unnecessary prototype for cdrom_get_disc_infoJoe Perches1-35/+36
Move the function to the proper spot instead. Signed-off-by: Joe Perches <joe@perches.com> Signed-off-by: Jens Axboe <axboe@fb.com>
2014-05-05cdrom: Remove unnecessary prototype for cdrom_mrw_exitJoe Perches1-117/+121
Move the function to appropriate locations instead. Signed-off-by: Joe Perches <joe@perches.com> Signed-off-by: Jens Axboe <axboe@fb.com>
2014-05-05cdrom: Remove cdrom_count_tracks prototypeJoe Perches1-47/+47
Move function to proper location instead. Fix whitespace and embedded if too. Signed-off-by: Joe Perches <joe@perches.com> Signed-off-by: Jens Axboe <axboe@fb.com>
2014-05-05cdrom: Remove cdrom_get_next_writeable prototypeJoe Perches1-50/+51
Move the function to the right spot instead. Signed-off-by: Joe Perches <joe@perches.com> Signed-off-by: Jens Axboe <axboe@fb.com>
2014-05-05cdrom: Remove cdrom_get_last_written prototypeJoe Perches1-96/+97
Move the function instead. Signed-off-by: Joe Perches <joe@perches.com> Signed-off-by: Jens Axboe <axboe@fb.com>
2014-05-05cdrom: Move mmc_ioctls above cdrom_ioctl to remove unnecessary prototypeJoe Perches1-124/+122
Neaten the spacing too. Signed-off-by: Joe Perches <joe@perches.com> Signed-off-by: Jens Axboe <axboe@fb.com>
2014-05-05cdrom: Remove unnecessary sanitize_format prototypeJoe Perches1-2/+0
It's defined below without being called. Signed-off-by: Joe Perches <joe@perches.com> Signed-off-by: Jens Axboe <axboe@fb.com>
2014-05-05cdrom: Remove unnecessary check_for_audio_disc prototypeJoe Perches1-2/+0
The actual static is defined below it but not used until later. Signed-off-by: Joe Perches <joe@perches.com> Signed-off-by: Jens Axboe <axboe@fb.com>
2014-05-05cdrom: Remove prototype for open_for_dataJoe Perches1-57/+57
Move static function to the appropriate place to remove the now unnecessary prototype. Signed-off-by: Joe Perches <joe@perches.com> Signed-off-by: Jens Axboe <axboe@fb.com>
2014-05-05cdrom: Remove obfuscating IOCTL_IN and IOCTL_OUT macrosJoe Perches1-21/+27
Macros with hidden control flow aren't nice. Just use copy_to/from_user directly instead. Signed-off-by: Joe Perches <joe@perches.com> Signed-off-by: Jens Axboe <axboe@fb.com>
2014-05-05cdrom: Remove unused CHECKAUDIO macroJoe Perches1-3/+0
It's unused, make it disappear. Signed-off-by: Joe Perches <joe@perches.com> Signed-off-by: Jens Axboe <axboe@fb.com>
2014-05-05cdrom: convert cdinfo to cd_dbgJoe Perches1-120/+121
It's a debugging message, mark it so. Signed-off-by: Joe Perches <joe@perches.com> Signed-off-by: Jens Axboe <axboe@fb.com>
2013-07-03drivers/cdrom/cdrom.c: use kzalloc() for failing hardwareJonathan Salwan1-1/+1
In drivers/cdrom/cdrom.c mmc_ioctl_cdrom_read_data() allocates a memory area with kmalloc in line 2885. 2885 cgc->buffer = kmalloc(blocksize, GFP_KERNEL); 2886 if (cgc->buffer == NULL) 2887 return -ENOMEM; In line 2908 we can find the copy_to_user function: 2908 if (!ret && copy_to_user(arg, cgc->buffer, blocksize)) The cgc->buffer is never cleaned and initialized before this function. If ret = 0 with the previous basic block, it's possible to display some memory bytes in kernel space from userspace. When we read a block from the disk it normally fills the ->buffer but if the drive is malfunctioning there is a chance that it would only be partially filled. The result is an leak information to userspace. Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Cc: Jens Axboe <axboe@kernel.dk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2012-02-08cdrom: move shared static to cdrom_device_infoPaolo Bonzini1-7/+5
The keeplocked variable in the cdrom driver is shared across multiple drives, but set in per-device ioctls. Move it to the per-device struct, avoiding that the setting on one drive affects the driver's behavior when closing another. [ Impact: limit udev's confusion to one drive when a CD burning program unlocks the CD door at the end of burning. ] Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2012-02-06cdrom: use copy_to_user() without the underscoresDan Carpenter1-7/+1
"nframes" comes from the user and "nframes * CD_FRAMESIZE_RAW" can wrap on 32 bit systems. That would have been ok if we used the same wrapped value for the copy, but we use a shifted value. We should just use the checked version of copy_to_user() because it's not going to make a difference to the speed. Cc: stable@vger.kernel.com Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2012-01-14block: add and use scsi_blk_cmd_ioctlPaolo Bonzini1-2/+1
Introduce a wrapper around scsi_cmd_ioctl that takes a block device. The function will then be enhanced to detect partition block devices and, in that case, subject the ioctls to whitelisting. Cc: linux-scsi@vger.kernel.org Cc: Jens Axboe <axboe@kernel.dk> Cc: James Bottomley <JBottomley@parallels.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2012-01-13module_param: make bool parameters really bool (drivers & misc)Rusty Russell1-6/+6
module_param(bool) used to counter-intuitively take an int. In fddd5201 (mid-2009) we allowed bool or int/unsigned int using a messy trick. It's time to remove the int/unsigned int option. For this version it'll simply give a warning, but it'll break next kernel version. Acked-by: Mauro Carvalho Chehab <mchehab@redhat.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
2012-01-03fs: move code out of buffer.cAl Viro1-1/+0
Move invalidate_bdev, block_sync_page into fs/block_dev.c. Export kill_bdev as well, so brd doesn't have to open code it. Reduce buffer_head.h requirement accordingly. Removed a rather large comment from invalidate_bdev, as it looked a bit obsolete to bother moving. The small comment replacing it says enough. Signed-off-by: Nick Piggin <npiggin@suse.de> Cc: Al Viro <viro@ZenIV.linux.org.uk> Cc: Christoph Hellwig <hch@lst.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2011-08-02drivers/cdrom/cdrom.c: relax check on dvd manufacturer valueAndrew Morton1-1/+7
The report has an ISO which has a very long manufacturer ID. It seems that Linux is wrong, not the ISO maker. Relax the check for the length of this field: emit a warning and truncate the incoming data to 2048 bytes rather than rejecting the entire thing. dvd_manufact.value isn't null-terminated. I'm not even sure if it's a string. The kernel doesn't apepar to use it anyway. Addresses https://bugzilla.kernel.org/show_bug.cgi?id=39062 Reported-by: <ale.goujon@gmail.com> Tested-by: <ale.goujon@gmail.com> Cc: Jens Axboe <axboe@kernel.dk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
2011-04-29cdrom: always check_disk_change() on openTejun Heo1-3/+3
cdrom_open() called check_disk_change() after the rest of open path succeeded which leads to the following bizarre behavior. * After media change, if the device opened without O_NONBLOCK, open_for_data() naturally fails with -ENOMEDIA and check_disk_change() is never called. The media is known to be gone and the open failure makes it obvious to the userland but device invalidation never happens. * But if the device is opened with O_NONBLOCK, all the checks are bypassed and cdrom_open() doesn't notice that the media is not there and check_disk_change() is called and invalidation happens. There's nothing to be gained by avoiding calling check_disk_change() on open failure. Common cases end up calling check_disk_change() anyway. All we get is inconsistent behavior. Fix it by moving check_disk_change() invocation to the top of cdrom_open() so that it always gets called regardless of how the rest of open proceeds. Stable: 2.6.38 Signed-off-by: Tejun Heo <tj@kernel.org> Reported-by: Amit Shah <amit.shah@redhat.com> Tested-by: Amit Shah <amit.shah@redhat.com> Cc: stable@kernel.org Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
2011-03-31Fix common misspellingsLucas De Marchi1-2/+2
Fixes generated by 'codespell' and manually reviewed. Signed-off-by: Lucas De Marchi <lucas.demarchi@profusion.mobi>
2011-02-09cdrom: support devices that have check_events but not media_changedSimon Arlott1-1/+2
Commit 93aae17af1172c40c6f74b7294e93a90c3cfaa5d ("sr: implement sr_check_events()") replaced the media_changed op with the check_events op in drivers/scsi/sr.c All users that check for the CDC_MEDIA_CHANGED capbility try both the check_events op and the media_changed op, but register_cdrom() was requiring media_changed. This patch fixes the capability checking. The cdrom_select_disc ioctl is also using the two operations, so they should be required for CDC_SELECT_DISC too. Signed-off-by: Simon Arlott <simon@fire.lp0.eu> Cc: Tejun Heo <tj@kernel.org> Cc: Kay Sievers <kay.sievers@vrfy.org> Tested-by: Chris Clayton <chris2553@googlemail.com> Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
2010-12-16cdrom: export cdrom_check_events()Jens Axboe1-0/+1
It's used by sr, so we need to export it. Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
2010-12-16cdrom: add ->check_events() supportTejun Heo1-3/+52
In principle, cdrom just needs to pass through ->check_events() but CDROM_MEDIA_CHANGED ioctl makes things a bit more complex. Just as with ->media_changed() support, cdrom code needs to buffer the events and serve them to ioctl and vfs as requested. As the code has to deal with both ->check_events() and ->media_changed(), and vfs and ioctl event buffering, this patch adds check_events caching on top of the existing cdi->mc_flags buffering. It may be a good idea to deprecate CDROM_MEDIA_CHANGED ioctl and remove all this mess. Signed-off-by: Tejun Heo <tj@kernel.org> Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
2010-08-07drivers/cdrom: use pr_<level>Joe Perches1-20/+26
- add pr_fmt. - convert printks to pr_<level> - add if (0) and printf argument checking to cdinfo - coalesce consecutive printks to single pr_ - fix a typo "back ground" to "background" - convert printks without level to pr_info - remove VIOCD_ prefixes and use pr_fmt/pr_<level> - add a missing newline to an OS/400 message Signed-off-by: Joe Perches <joe@perches.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Folded in tab indentation fix from Andrew. Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
2009-11-18sysctl: Drop & in front of every proc_handler.Eric W. Biederman1-6/+6
For consistency drop & in front of every proc_handler. Explicity taking the address is unnecessary and it prevents optimizations like stubbing the proc_handlers to NULL. Cc: Alexey Dobriyan <adobriyan@gmail.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Joe Perches <joe@perches.com> Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
2009-11-12sysctl drivers: Remove dead binary sysctl supportEric W. Biederman1-5/+3
Now that sys_sysctl is a wrapper around /proc/sys all of the binary sysctl support elsewhere in the tree is dead code. Cc: Jens Axboe <axboe@kernel.dk> Cc: Corey Minyard <minyard@acm.org> Cc: Greg Kroah-Hartman <gregkh@suse.de> Cc: Matt Mackall <mpm@selenic.com> Cc: Herbert Xu <herbert@gondor.apana.org.au> Cc: Neil Brown <neilb@suse.de> Cc: "James E.J. Bottomley" <James.Bottomley@suse.de> Acked-by: Clemens Ladisch <clemens@ladisch.de> for drivers/char/hpet.c Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
2009-09-24sysctl: remove "struct file *" argument of ->proc_handlerAlexey Dobriyan1-4/+4
It's unused. It isn't needed -- read or write flag is already passed and sysctl shouldn't care about the rest. It _was_ used in two places at arch/frv for some reason. Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> Cc: David Howells <dhowells@redhat.com> Cc: "Eric W. Biederman" <ebiederm@xmission.com> Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: "David S. Miller" <davem@davemloft.net> Cc: James Morris <jmorris@namei.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-05-22block: Use accessor functions for queue limitsMartin K. Petersen1-2/+2
Convert all external users of queue limits to using wrapper functions instead of poking the request queue variables directly. Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
2008-12-29cdrom: reduce stack usage of mmc_ioctl_dvd_read_structMarcin Slusarz1-62/+77
1. kmalloc 192 bytes in dvd_read_bca (which is inlined into dvd_read_struct) 2. Pass struct packet_command to all dvd_read_* functions. Checkstack output: Before: mmc_ioctl_dvd_read_struct: 280 After: mmc_ioctl_dvd_read_struct: 56 Signed-off-by: Marcin Slusarz <marcin.slusarz@gmail.com> Cc: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Jens Axboe <jens.axboe@oracle.com> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
2008-12-29cdrom: split mmc_ioctl to lower stack usageMarcin Slusarz1-241/+329
Checkstack output: Before: mmc_ioctl: 584 After: mmc_ioctl_dvd_read_struct: 280 mmc_ioctl_cdrom_subchannel: 152 mmc_ioctl_cdrom_read_data: 120 mmc_ioctl_cdrom_volume: 104 mmc_ioctl_cdrom_read_audio: 104 (mmc_ioctl is inlined into cdrom_ioctl - 104 bytes) Signed-off-by: Marcin Slusarz <marcin.slusarz@gmail.com> Cc: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Jens Axboe <jens.axboe@oracle.com> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
2008-12-12Commands needing to be retried require a complete re-initialization.Alan D. Brunelle1-6/+10
The test-unit-ready portion of this patch was causing boots to fail on my test machine (as in http://lkml.org/lkml/2008/12/5/161). With this patch in place, the system is booting reliably. Mike Anderson found the same problem in the hp_hw_start_stop code, and I applied the same solution in cdrom_read_cdda_bpc. Signed-off-by: Alan D. Brunelle <alan.brunelle@hp.com> Cc: Mike Anderson <andmike@linux.vnet.ibm.com> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
2008-10-21[PATCH] switch cdrom_{open,release,ioctl} to sane APIsAl Viro1-12/+11
... convert to it in callers Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2008-10-21[PATCH] switch scsi_cmd_ioctl() to passing fmode_tAl Viro1-1/+1
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2008-10-21[PATCH] eliminate use of ->f_flags in block methodsAl Viro1-2/+2
store needed information in f_mode Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2008-10-09block: introduce struct rq_map_data to use reserved pagesFUJITA Tomonori1-1/+1
This patch introduces struct rq_map_data to enable bio_copy_use_iov() use reserved pages. Currently, bio_copy_user_iov allocates bounce pages but drivers/scsi/sg.c wants to allocate pages by itself and use them. struct rq_map_data can be used to pass allocated pages to bio_copy_user_iov. The current users of bio_copy_user_iov simply passes NULL (they don't want to use pre-allocated pages). Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Cc: Jens Axboe <jens.axboe@oracle.com> Cc: Douglas Gilbert <dougg@torque.net> Cc: Mike Christie <michaelc@cs.wisc.edu> Cc: James Bottomley <James.Bottomley@HansenPartnership.com> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
2008-10-09block: add gfp_mask argument to blk_rq_map_user and blk_rq_map_user_iovFUJITA Tomonori1-1/+1
Currently, blk_rq_map_user and blk_rq_map_user_iov always do GFP_KERNEL allocation. This adds gfp_mask argument to blk_rq_map_user and blk_rq_map_user_iov so sg can use it (sg always does GFP_ATOMIC allocation). Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Signed-off-by: Douglas Gilbert <dougg@torque.net> Cc: Mike Christie <michaelc@cs.wisc.edu> Cc: James Bottomley <James.Bottomley@HansenPartnership.com> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
2008-08-18cdrom: handle TOCAlexander Inyukhin1-7/+0
This patch should fix TOC handling for cdroms that can not play audio. It extends commit af744e3294d09d706c4eae26cffaaa68a8d40337 ("cdrom: don't check CDC_PLAY_AUDIO in cdrom_count_tracks()") with a safety check and non-audio ioctls support. Since CDC_PLAY_AUDIO flag was used not only to check ability to play audio but also to ensure that audio_ioctl was not NULL, all TOC-related operations had to use it. As far as I understand, now audio_ioctl is never NULL, so a sanity check during device registration should be sufficient. It was tested on Optiarc AD7203A device, that has no ability to play audio. Cc: Tejun Heo <tj@kernel.org> Cc: Jens Axboe <jens.axboe@oracle.com> Cc: Borislav Petkov <petkovbb@googlemail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> [bart: remove now unneeded ->audio_ioctl check (noticed by Borislav)] Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
2008-08-05cdrom: don't check CDC_PLAY_AUDIO in cdrom_count_tracks()Tejun Heo1-4/+0
According to MMC-3 (or any later versions) READ TOCs are mandatory commands and have nothing to do with CDC_PLAY_AUDIO. I have no idea why the check was put there in the first place but it now only breaks automatic actions on certain drives. Note that this test was only effective when ide-cdrom was being used as sr didn't mask CDC_PLAY_AUDIO according to the capabilities. Signed-off-by: Tejun Heo <tj@kernel.org> Acked-by: Jens Axboe <jens.axboe@oracle.com> Cc: Borislav Petkov <petkovbb@googlemail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
2008-07-04cdrom: revert commit 22a9189 (cdrom: use kmalloced buffers instead of ↵FUJITA Tomonori1-181/+93
buffers on stack) The commit 22a9189fd073db3d03a4cf8b8c098aa207602de1 (cdrom: use kmalloced buffers instead of buffers on stack) is introduced to use kmalloced buffers for packet commands to avoid stack corruption on non coherent platforms. SCSI cdrom uses blk_rq_map_kern, which properly avoids DMA on the stack by using the bounce buffers. IDE cdrom also has the mechnism to avoids DMA on the stack. So we don't need this extra complexitiy in cdrom.c, such as allocating just 8 bytes. The lower layers can handle it. Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Cc: Thomas Bogendoerfer <tsbogend@alpha.franken.de> Cc: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com> Cc: Thomas Bogendoerfer <tsbogend@alpha.franken.de> Cc: Tejun Heo <htejun@gmail.com> Cc: James Bottomley <James.Bottomley@HansenPartnership.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
2008-04-29block: no need to initialize rq->cmd with blk_get_requestFUJITA Tomonori1-1/+0
blk_get_request initializes rq->cmd (rq_init does) so the users don't need to do that. The purpose of this patch is to remove sizeof(rq->cmd) and &rq->cmd, as a preparation for large command support, which changes rq->cmd from the static array to a pointer. sizeof(rq->cmd) will not make sense and &rq->cmd won't work. Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Cc: James Bottomley <James.Bottomley@HansenPartnership.com> Cc: Alasdair G Kergon <agk@redhat.com> Cc: Jens Axboe <jens.axboe@oracle.com> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
2008-04-21cdrom: use kmalloced buffers instead of buffers on stackThomas Bogendoerfer1-93/+181
If cdrom commands are issued to a scsi drive in most cases the buffer will be filled via dma. This leads to bad stack corruption on non coherent platforms, because the buffers are neither cache line aligned nor is the size a multiple of the cache line size. Using kmalloced buffers avoids this. Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
2008-04-21cdrom: make unregister_cdrom() return voidAkinobu Mita1-2/+1
Now unregister_cdrom() always returns 0. Make it return void and update all callers that check the return value. Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com> Cc: Adrian McMenamin <adrian@mcmen.demon.co.uk> Cc: Borislav Petkov <petkovbb@gmail.com> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
2008-04-21cdrom: use list_head for cdrom_device_info listAkinobu Mita1-23/+6
Use list_head for cdrom_device_info list instead of opencoded singly list handling. Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
2008-04-21cdrom: protect cdrom_device_info list by mutexAkinobu Mita1-0/+2
This patch protects the list of cdrom_device_info by cdrom_mutex when the file in /proc/sys/dev/cdrom/ is written. Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
2008-04-21cdrom: cleanup hardcoded error-codeAkinobu Mita1-1/+1
This patch eliminates hardcoded return value of register_cdrom(). It also changes the return value to -EINVAL. It is more appropriate than -2 (-ENOENT) because it is only happen invalid usage of register_cdrom() by broken cdrom driver. Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
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