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path: root/drivers/scsi/ch.c
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2008-07-26[SCSI] ch: fix ch_remove oopsFUJITA Tomonori
The following commit causes ch_remove oops: commit 24b42566c3fcbb5a9011d1446783d0f5844ccd45 Author: Greg Kroah-Hartman <gregkh@suse.de> Date: Fri May 16 17:55:12 2008 -0700 SCSI: fix race in device_create There is a race from when a device is created with device_create() and then the drvdata is set with a call to dev_set_drvdata() in which a sysfs file could be open, yet the drvdata will be NULL, causing all sorts of bad things to happen. This patch fixes the problem by using the new function, device_create_drvdata(). It fixes the problem in all of the scsi drivers that need it. Cc: Kay Sievers <kay.sievers@vrfy.org> Cc: Doug Gilbert <dgilbert@interlog.com> Cc: James E.J. Bottomley <James.Bottomley@HansenPartnership.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de> The problem is ch_probe stores ch's private data at a wrong place. We need to store it at scsi_device->sdev_gendev but the above patch stores it at device struct that device_create_drvdata returns. So we hit an oops when ch_remove accesses scsi_device->sdev_gendev->driver_data, which is NULL. Actually, there wasn't a race because ch doesn't create sysfs files with device struct that device_create returns. This patch puts back dev_set_drvdata() to set ch's private data properly. Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
2008-07-14Merge commit 'v2.6.26' into bkl-removalJonathan Corbet
2008-06-20changer: BKL pushdownJonathan Corbet
Add lock_kernel() calls to ch_open(), though the existing locking looks adequate. Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2008-05-20SCSI: fix race in device_createGreg Kroah-Hartman
There is a race from when a device is created with device_create() and then the drvdata is set with a call to dev_set_drvdata() in which a sysfs file could be open, yet the drvdata will be NULL, causing all sorts of bad things to happen. This patch fixes the problem by using the new function, device_create_drvdata(). It fixes the problem in all of the scsi drivers that need it. Cc: Kay Sievers <kay.sievers@vrfy.org> Cc: Doug Gilbert <dgilbert@interlog.com> Cc: James E.J. Bottomley <James.Bottomley@HansenPartnership.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2008-04-19SCSI: convert struct class_device to struct deviceTony Jones
It's big, but there doesn't seem to be a way to split it up smaller... Signed-off-by: Tony Jones <tonyj@suse.de> Signed-off-by: Kay Sievers <kay.sievers@vrfy.org> Cc: Roland Dreier <rolandd@cisco.com> Cc: Sean Hefty <sean.hefty@intel.com> Cc: Hal Rosenstock <hal.rosenstock@gmail.com> Cc: James Bottomley <James.Bottomley@HansenPartnership.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2008-04-07[SCSI] ch: fix sparse shadowed variable warningsHarvey Harrison
Replace the global err array with ch_err. drivers/scsi/ch.c:271:6: warning: symbol 'err' shadows an earlier one drivers/scsi/ch.c:116:3: originally declared here Replace the temporary cmd buffer with ch_err to avoid shadowing the cmd function parameter. drivers/scsi/ch.c:724:11: warning: symbol 'cmd' shadows an earlier one drivers/scsi/ch.c:596:20: originally declared here Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com> Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
2008-01-25[SCSI] ch: remove forward declarationsFUJITA Tomonori
This moves ch_template and changer_fops structs to the end of file and removes forward declarations. This also removes some trailing whitespace. Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
2008-01-25[SCSI] ch: fix device minor number management bugFUJITA Tomonori
ch_probe uses the total number of ch devices as minor. ch_probe: ch->minor = ch_devcount; ... ch_devcount++; Then ch_remove decreases ch_devcount: ch_remove: ch_devcount--; If you have two ch devices, sch0 and sch1, and remove sch0, ch_devcount is 1. Then if you add another ch device, ch_probe tries to create sch1. So you get a warning and fail to create sch1: Jan 24 16:01:05 nice kernel: sysfs: duplicate filename 'sch1' can not be created Jan 24 16:01:05 nice kernel: WARNING: at fs/sysfs/dir.c:424 sysfs_add_one() Jan 24 16:01:05 nice kernel: Pid: 2571, comm: iscsid Not tainted 2.6.24-rc7-ga3d2c2e8-dirty #1 Jan 24 16:01:05 nice kernel: Jan 24 16:01:05 nice kernel: Call Trace: Jan 24 16:01:05 nice kernel: [<ffffffff802a22b8>] sysfs_add_one+0x54/0xbd Jan 24 16:01:05 nice kernel: [<ffffffff802a283c>] create_dir+0x4f/0x87 Jan 24 16:01:05 nice kernel: [<ffffffff802a28a9>] sysfs_create_dir+0x35/0x4a Jan 24 16:01:05 nice kernel: [<ffffffff803069a1>] kobject_get+0x12/0x17 Jan 24 16:01:05 nice kernel: [<ffffffff80306ece>] kobject_add+0xf3/0x1a6 Jan 24 16:01:05 nice kernel: [<ffffffff8034252b>] class_device_add+0xaa/0x39d Jan 24 16:01:05 nice kernel: [<ffffffff803428fb>] class_device_create+0xcb/0xfa Jan 24 16:01:05 nice kernel: [<ffffffff80229e09>] printk+0x4e/0x56 Jan 24 16:01:05 nice kernel: [<ffffffff802a2054>] sysfs_ilookup_test+0x0/0xf Jan 24 16:01:05 nice kernel: [<ffffffff88022580>] :ch:ch_probe+0xbe/0x61a (snip) This patch converts ch to use a standard minor number management way, idr like sg and bsg. Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
2008-01-23[SCSI] ch: handle class_device_create failure properlyFUJITA Tomonori
When class_device_create fails, ch_probe needs to fail too. Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
2008-01-23[SCSI] ch: Convert to use unlocked_ioctlMathieu Segaud
As of now, compat_ioctl already runs without the BKL, whereas ioctl runs with the BKL. This patch first converts changer_fops to use a .unlocked_ioctl member. It applies the same locking rationale than ch_ioctl_compat() uses to ch_ioctl(). Signed-off-by: Mathieu Segaud <mathieu.segaud@regala.cx> Reviewed-by: Matthew Wilcox <willy@linux.intel.com> Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
2007-05-06[SCSI] ch: kmalloc/memset->kzallocvignesh.babu@wipro.com
Replacing kmalloc/memset combination with kzalloc. Signed-off-by: vignesh babu <vignesh.babu@wipro.com> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
2007-02-14[PATCH] remove many unneeded #includes of sched.hTim Schmielau
After Al Viro (finally) succeeded in removing the sched.h #include in module.h recently, it makes sense again to remove other superfluous sched.h includes. There are quite a lot of files which include it but don't actually need anything defined in there. Presumably these includes were once needed for macros that used to live in sched.h, but moved to other header files in the course of cleaning it up. To ease the pain, this time I did not fiddle with any header files and only removed #includes from .c-files, which tend to cause less trouble. Compile tested against 2.6.20-rc2 and 2.6.20-rc2-mm2 (with offsets) on alpha, arm, i386, ia64, mips, powerpc, and x86_64 with allnoconfig, defconfig, allmodconfig, and allyesconfig as well as a few randconfigs on x86_64 and all configs in arch/arm/configs on arm. I also checked that no new warnings were introduced by the patch (actually, some warnings are removed that were emitted by unnecessarily included header files). Signed-off-by: Tim Schmielau <tim@physik3.uni-rostock.de> Acked-by: Russell King <rmk+kernel@arm.linux.org.uk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-02-12[PATCH] mark struct file_operations const 6Arjan van de Ven
Many struct file_operations in the kernel can be "const". Marking them const moves these to the .rodata section, which avoids false sharing with potential dirty data. In addition it'll catch accidental writes at compile time to these shared resources. Signed-off-by: Arjan van de Ven <arjan@linux.intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2006-06-30Remove obsolete #include <linux/config.h>Jörn Engel
Signed-off-by: Jörn Engel <joern@wohnheim.fh-wedel.de> Signed-off-by: Adrian Bunk <bunk@stusta.de>
2006-03-12[SCSI] MODULE_ALIAS_{BLOCK,CHAR}DEV_MAJOR for drivers/scsiRene Herman
Add device-major aliases in drivers/scsi, allowing kmod autoload: MODULE_ALIAS_CHARDEV_MAJOR(SCSI_CHANGER_MAJOR) MODULE_ALIAS_CHARDEV_MAJOR(OSST_MAJOR) MODULE_ALIAS_CHARDEV_MAJOR(SCSI_TAPE_MAJOR) MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_CDROM_MAJOR) MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_DISKN_MAJOR) Signed-off-by: Andrew Morton <akpm@osdl.org> Acked-by: Kai Makisara <kai.makisara@kolumbus.fi> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
2006-01-12[SCSI] turn most scsi semaphores into mutexesArjan van de Ven
the scsi layer is using semaphores in a mutex way, this patch converts these into using mutexes instead Signed-off-by: Arjan van de Ven <arjan@infradead.org> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
2006-01-10[PATCH] don't include ioctl32.h in driversChristoph Hellwig
These days ioctl32.h is only used for communication of fs/compat.c and fs/compat_ioctl.c and doesn't contain anything of interest to drivers. Remove inclusion in various drivers. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-12-13[SCSI] Mark some core scsi data structures constArjan van de Ven
patch below marks a few scsi core datastructures as const, so that they end up in the .rodata section and don't cacheline share with things that get dirtied Signed-off-by: Arjan van de Ven <arjan@infradead.org> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
2005-11-04Merge by HandJames Bottomley
Conflicts in dec_esp.c (Thanks Bacchus), scsi_transport_iscsi.c and scsi_transport_fc.h Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
2005-10-28[SCSI] use sfoo_printk() in driversJeff Garzik
Rejections fixed up and Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
2005-10-28[PATCH] Driver Core: fix up all callers of class_device_create()Greg Kroah-Hartman
The previous patch adding the ability to nest struct class_device changed the paramaters to the call class_device_create(). This patch fixes up all in-kernel users of the function. Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2005-09-10[PATCH] __user annotations (scsi/ch)viro@ZenIV.linux.org.uk
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-09-09[PATCH] more SPIN_LOCK_UNLOCKED -> DEFINE_SPINLOCK conversionsIngo Molnar
This converts the final 20 DEFINE_SPINLOCK holdouts. (another 580 places are already using DEFINE_SPINLOCK). Build tested on x86. Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-08-28[SCSI] convert ch to use scsi_execute_reqJames Bottomley
I also tinkered with it's sense recognition routines to make them take scsi_sense_hdr structures instead of raw sense data. Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
2005-07-30[SCSI] git-scsi-misc: drivers/scsi/ch.c: remove devfs stuffAdrian Bunk
It seems very unlikely that this driver will go into any stable kernel before devfs will be removed. Signed-off-by: Adrian Bunk <bunk@stusta.de> Cc: James Bottomley <James.Bottomley@steeleye.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
2005-05-20[SCSI] convert scsi changer driver from class simpleGerd Knorr
Here is a incremental patch which switches the driver over to the new non-simple functions. Compile-tested. Signed-off-by: Gerd Knorr <kraxel@bytesex.org> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
2005-05-20[SCSI] add scsi changer driverGerd Knorr
This patch adds a device driver for scsi media changer devices. Signed-off-by: Gerd Knorr <kraxel@bytesex.org> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>