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path: root/drivers/scsi/sg.c
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2005-06-20[PATCH] class: convert drivers/scsi/* to use the new class api instead of ↵gregkh@suse.de
class_simple Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2005-06-03[SCSI] sg: Command completion after remove oopsbrking@us.ibm.com
A problem exists todayin the sg driver that if an SG_IO request is outstanding to a device when it is removed from the system. The system may oops if that command completes later in time. 1. sg_remove gets called 2. sg_remove calls sg_finish_req_req on all pending requests This removes the Sg_request's from the headrp list in the Sg_fd 3. The sleeping SG_IO ioctl is woken. It does nothing and returns. 4. The caller closes the fd, which invokes sg_release 5. sg_release calls sg_remove_sfp. It finds no outstanding commands since the headrp list is empty, so it calls __sg_remove_sfp, which frees the sfp. 6. Now when sg_cmd_done gets called, sg uses upper_private_data in the Scsi_Request, which should point to the srp, which has been freed, so it points to freed memory. 7. sg then dereferences the srp pointer to get the sfp, and we oops. The fix is to NULL out the upper_private_data field in this path, which sg_cmd_done already checks for, which will prevent the oops from occurring. cpu 0x1: Vector: 300 (Data Access) at [c00000000fff7aa0] pc: d0000000002bbea8: .sg_cmd_done+0x70/0x394 [sg] lr: d000000000073304: .scsi_finish_command+0x10c/0x130 [scsi_mod] sp: c00000000fff7d20 msr: 8000000000009032 dar: 2f70726f63202f78 dsisr: 40000000 current = 0xc0000000024589b0 paca = 0xc0000000003da800 pid = 7, comm = events/1 [c00000000fff7dc0] d000000000073304 .scsi_finish_command+0x10c/0x130 [scsi_mod] [c00000000fff7e50] d00000000007317c .scsi_softirq+0x140/0x168 [scsi_mod] [c00000000fff7ef0] c0000000000634dc .__do_softirq+0xa0/0x17c [c00000000fff7f90] c000000000018430 .call_do_softirq+0x14/0x24 [c00000000ed472e0] c0000000000142e0 .do_softirq+0x74/0x9c [c00000000ed47370] c000000000013c9c .do_IRQ+0xe8/0x100 [c00000000ed473f0] c00000000000ae34 HardwareInterrupt_entry+0x8/0x54 c00000000003df28 .smp_call_function+0 x100/0x1d0 [c00000000ed47780] c0000000000ba99c .invalidate_bh_lrus+0x30/0x70 [c00000000ed47810] c0000000000b91a0 .invalidate_bdev+0x18/0x3c [c00000000ed478a0] c0000000000da7b8 .__invalidate_device+0x70/0x94 [c00000000ed47930] c0000000001d40bc .invalidate_partition+0x4c/0x7c [c00000000ed479c0] c00000000010a944 .del_gendisk+0x48/0x15c [c00000000ed47a50] d00000000003d55c .sd_remove+0x34/0xe4 [sd_mod] [c00000000ed47ae0] c0000000001c5d30 .device_release_driver+0x90/0xb4 [c00000000ed47b70] c0000000001c6130 .bus_remove_device+0xb0/0x12c [c00000000ed47c00] c0000000001c4378 .device_del+0x120/0x198 [c00000000ed47ca0] d00000000007dcdc .scsi_remove_device+0xb4/0x194 [scsi_mod] [c00000000ed47d30] d0000000000a5864 .ipr_worker_thread+0x1d4/0x27c [ipr] [c00000000ed47dd0] c0000000000734c4 .worker_thread+0x238/0x2f4 [c00000000ed47ee0] c0000000000796c0 .kthread+0xcc/0x11c [c00000000ed47f90] c000000000018ad0 .kernel_thread+0x4c/0x6c Signed-off-by: Brian King <brking@us.ibm.com> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
2005-04-18[PATCH] remove old scsi data direction macros
these have been wrappers for the generic dma direction bits since 2.5.x. This patch converts the few remaining drivers and removes the macros. Arjan noticed there's some hunk in here that shouldn't. Updated patch below: Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
2005-04-18merge by hand (scsi_device.h)James Bottomley
2005-04-18[PATCH] remove outdated print_* functions
We have the scsi_print_* functions in the proper namespace for a long time now and there weren't a lot users left. Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
2005-04-16[PATCH] sg.c: update
The attachment combines the most recent patch from Yum Rayan <yum.rayan@gmail.com> (to reduce sg stack usage), Adrian Bunk <bunk@stusta.de> (to fix check after use) and me (fix elapsed time calculation (duration) on ia64 machines). I have modified the patch from Yum Rayan so kmalloc() in sg_read() is only called for the (rare) code paths that need them. Changelog: - reduce stack usage in sg_ioctl() and sg_read() - fix check after use in sg_mmap() - hold duration internally in milliseconds and check current time later than held time Signed-off-by: Douglas Gilbert <dougg@torque.net> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
2005-04-16Linux-2.6.12-rc2Linus Torvalds
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!