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    Subject2.6.5-rc1 SCSI + st regressions (was: Linux 2.6.5-rc1)
    On Mon, 15 Mar 2004, Linus Torvalds wrote:

    > Here's the current set of patches I've merged from various poeple..
    > Merging from Andrew, but also i2c updates, ALSA CVS merge, netconsole,
    > prism54 driver merge, sata updates, carmel driver, pcmcia and nfs client
    > updates..
    > And a few architectures updated: ia64, ppc32, sparc32, arm.

    > Summary of changes from v2.6.4 to v2.6.5-rc1
    > ============================================


    I have some SCSI troubles with 2.6.5-rc1 (from BK) that 2.6.4 didn't

    Modprobe, loading the st driver, tries a NULL pointer dereference in
    kernel space and my 2nd tape drive isn't found: st1 is not shown. cat
    /proc/scsi/scsi (typed after the attempted zero page dereference) hangs
    in rwsem_down_read_failed with process state D.

    I've re-built the kernel after doing a "make clean"
    but to no avail (as expected).

    sym0: <875> rev 0x26 at pci 0000:00:0d.0 irq 16
    sym0: Tekram NVRAM, ID 7, Fast-20, SE, parity checking
    sym0: SCSI BUS has been reset.
    scsi0 : sym-2.1.18i
    Vendor: FUJITSU Model: MAH3182MP Rev: 0114
    Type: Direct-Access ANSI SCSI revision: 04
    sym0:1:0: tagged command queuing enabled, command queue depth 32.
    Vendor: PLEXTOR Model: CD-ROM PX-32TS Rev: 1.02
    Type: CD-ROM ANSI SCSI revision: 02
    Vendor: TANDBERG Model: TDC 4222 Rev: =07:
    Type: Sequential-Access ANSI SCSI revision: 02
    Vendor: TANDBERG Model: SLR6 Rev: 0404
    Type: Sequential-Access ANSI SCSI revision: 02
    DC390: 0 adapters found
    libata version 1.01 loaded.
    sym0:1: FAST-20 WIDE SCSI 40.0 MB/s ST (50.0 ns, offset 16)
    SCSI device sda: 35701260 512-byte hdwr sectors (18279 MB)
    SCSI device sda: drive cache: write through
    sda: sda1 sda2 sda3 < sda5 >
    Attached scsi disk sda at scsi0, channel 0, id 1, lun 0
    Attached scsi generic sg0 at scsi0, channel 0, id 1, lun 0, type 0
    Attached scsi generic sg1 at scsi0, channel 0, id 2, lun 0, type 5
    Attached scsi generic sg2 at scsi0, channel 0, id 6, lun 0, type 1
    Attached scsi generic sg3 at scsi0, channel 0, id 8, lun 0, type 1
    sym0:2: FAST-20 SCSI 20.0 MB/s ST (50.0 ns, offset 15)
    sr0: scsi-1 drive
    Attached scsi CD-ROM sr0 at scsi0, channel 0, id 2, lun 0
    st: Version 20040226, fixed bufsize 32768, s/g segs 256
    Unable to handle kernel NULL pointer dereference at virtual address 0000002e
    printing eip:
    *pde = 00000000
    Oops: 0002 [#1]
    CPU: 0
    EIP: 0060:[<d1ba00fc>] Not tainted
    EFLAGS: 00010282 (2.6.5-rc1)
    EIP is at st_probe+0x7dc/0x99f [st]
    eax: cd20024c ebx: ffffffea ecx: 00000000 edx: 0000000a
    esi: 00000004 edi: 00000000 ebp: cd10bdbc esp: cd10bd34
    ds: 007b es: 007b ss: 0068
    Process modprobe (pid: 1303, threadinfo=cd10a000 task=cd148d80)
    Stack: cd5f9cc0 00900000 cfa3597c d1ba0628 cd70c6c4 00000000 cd10bd68 cd10bd68
    00000000 cd20024c 00000000 cd20024c cc623c80 cd10bd84 00000000 cd200200
    cd9d2980 00000008 cd88b000 00000000 d1ba2bf0 00000000 00000000 cd20024c
    Call Trace:
    [<c027eaeb>] bus_match+0x3b/0x70
    [<c027ed00>] driver_attach+0x50/0x90
    [<c027eddb>] bus_add_driver+0x9b/0xc0
    [<c027f3c1>] driver_register+0x31/0x40
    [<d19e50b6>] init_st+0xb6/0x155 [st]
    [<c0131200>] sys_init_module+0x130/0x1670
    [<c01bd5c1>] journal_stop+0x171/0x210
    [<c01af4b7>] ext3_mark_inode_dirty+0x47/0x60
    [<c0157110>] cdev_alloc+0x0/0x60
    [<c0144c55>] do_mmap_pgoff+0x365/0x6c0
    [<c014cda7>] filp_close+0x57/0x90
    [<c014ce2f>] sys_close+0x4f/0x60
    [<c01070ff>] syscall_call+0x7/0xb

    Code: 89 43 44 89 1c 24 c7 44 24 04 5c 2a ba d1 e8 f1 fb 6d ee c7
    <6>sym0:6: FAST-5 SCSI 4.8 MB/s ST (208.0 ns, offset 8)
    st0: Block limits 1 - 16777215 bytes.
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