linux.git/drivers/ide/falconide.c, branch v5.10.258

ide/falconide: Fix module unload

2021-03-04T10:38:21+00:00

[ Upstream commit 07f1dc8cc85bbfb2f9270f25060c4755f4509f45 ]

Unloading the falconide module results in a crash:

Unable to handle kernel NULL pointer dereference at virtual address 00000000
Oops: 00000000
Modules linked in: falconide(-)
PC: [<002930b2>] ide_host_remove+0x2e/0x1d2
SR: 2000  SP: 00b49e28  a2: 009b0f90
d0: 00000000    d1: 009b0f90    d2: 00000000    d3: 00b48000
d4: 003cef32    d5: 00299188    a0: 0086d000    a1: 0086d000
Process rmmod (pid: 322, task=009b0f90)
Frame format=7 eff addr=00000000 ssw=0505 faddr=00000000
wb 1 stat/addr/data: 0000 00000000 00000000
wb 2 stat/addr/data: 0000 00000000 00000000
wb 3 stat/addr/data: 0000 00000000 00018da9
push data: 00000000 00000000 00000000 00000000
Stack from 00b49e90:
        004c456a 0027f176 0027cb0a 0027cb9e 00000000 0086d00a 2187d3f0 0027f0e0
        00b49ebc 2187d1f6 00000000 00b49ec8 002811e8 0086d000 00b49ef0 0028024c
        0086d00a 002800d6 00279a1a 00000001 00000001 0086d00a 2187d3f0 00279a58
        00b49f1c 002802e0 0086d00a 2187d3f0 004c456a 0086d00a ef96af74 00000000
        2187d3f0 002805d2 800de064 00b49f44 0027f088 2187d3f0 00ac1cf4 2187d3f0
        004c43be 2187d3f0 00000000 2187d3f0 800b66a8 00b49f5c 00280776 2187d3f0
Call Trace: [<0027f176>] __device_driver_unlock+0x0/0x48
 [<0027cb0a>] device_links_busy+0x0/0x94
 [<0027cb9e>] device_links_unbind_consumers+0x0/0x130
 [<0027f0e0>] __device_driver_lock+0x0/0x5a
 [<2187d1f6>] falconide_remove+0x12/0x18 [falconide]
 [<002811e8>] platform_drv_remove+0x1c/0x28
 [<0028024c>] device_release_driver_internal+0x176/0x17c
 [<002800d6>] device_release_driver_internal+0x0/0x17c
 [<00279a1a>] get_device+0x0/0x22
 [<00279a58>] put_device+0x0/0x18
 [<002802e0>] driver_detach+0x56/0x82
 [<002805d2>] driver_remove_file+0x0/0x24
 [<0027f088>] bus_remove_driver+0x4c/0xa4
 [<00280776>] driver_unregister+0x28/0x5a
 [<00281a00>] platform_driver_unregister+0x12/0x18
 [<2187d2a0>] ide_falcon_driver_exit+0x10/0x16 [falconide]
 [<000764f0>] sys_delete_module+0x110/0x1f2
 [<000e83ea>] sys_rename+0x1a/0x1e
 [<00002e0c>] syscall+0x8/0xc
 [<00188004>] ext4_multi_mount_protect+0x35a/0x3ce
Code: 0029 9188 4bf9 0027 aa1c 283c 003c ef32 <265c> 4a8b 6700 00b8 2043 2028 000c 0280 00ff ff00 6600 0176 40c0 7202 b2b9 004c
Disabling lock debugging due to kernel taint

This happens because the driver_data pointer is uninitialized.
Add the missing platform_set_drvdata() call. For clarity, use the
matching platform_get_drvdata() as well.

Cc: Michael Schmitz 
Cc: Bartlomiej Zolnierkiewicz 
Fixes: 5ed0794cde593 ("m68k/atari: Convert Falcon IDE drivers to platform drivers")
Reviewed-by: Geert Uytterhoeven 
Reviewed-by: Michael Schmitz 
Signed-off-by: Finn Thain 
Signed-off-by: Jens Axboe 
Signed-off-by: Sasha Levin

m68k/atari: Convert Falcon IDE drivers to platform drivers

2019-11-18T09:18:59+00:00

Autoloading of Falcon IDE driver modules requires converting these
drivers to platform drivers.

Add platform device for Falcon IDE interface in Atari platform setup
code. Use this in the pata_falcon driver in place of the simple
platform device set up on the fly.

Convert falconide driver to use the same platform device that is used
by pata_falcon also. (With the introduction of a platform device for
the Atari Falcon IDE interface, the old Falcon IDE driver no longer
loads (resource already claimed by the platform device)).

Tested (as built-in driver) on my Atari Falcon.

Signed-off-by: Michael Schmitz 
Acked-by: Bartlomiej Zolnierkiewicz 
Link: https://lore.kernel.org/r/1573008449-8226-1-git-send-email-schmitzmic@gmail.com
Signed-off-by: Geert Uytterhoeven

ide: move ack_intr() method into 'struct ide_port_ops' (take 2)

2009-06-15T16:52:58+00:00

Move the ack_intr() method into 'struct ide_port_ops', also renaming it to
test_irq() while at it...

Signed-off-by: Sergei Shtylyov 
Signed-off-by: Bartlomiej Zolnierkiewicz

ide: remove hw_regs_t typedef

2009-05-17T17:12:25+00:00

Remove hw_regs_t typedef and rename struct hw_regs_s to struct ide_hw.

There should be no functional changes caused by this patch.

Acked-by: Sergei Shtylyov 
Signed-off-by: Bartlomiej Zolnierkiewicz

ide: pass number of ports to ide_host_{alloc,add}() (v2)

2009-05-17T17:12:24+00:00

Pass number of ports to ide_host_{alloc,add}() and then update
all users accordingly.

v2:
- drop no longer needed NULL initializers in buddha.c, cmd640.c and gayle.c
  (noticed by Sergei)

There should be no functional changes caused by this patch.

Acked-by: Sergei Shtylyov 
Signed-off-by: Bartlomiej Zolnierkiewicz

ide: remove chipset field from hw_regs_t

2009-05-17T17:12:22+00:00

* Convert host drivers that still use hw_regs_t's chipset field to use
  the one in struct ide_port_info instead.

* Move special handling of ide_pci chipset type from ide_hw_configure()
  to ide_init_port().

* Remove chipset field from hw_regs_t.

While at it:
- remove stale comment in delkin_cb.c

There should be no functional changes caused by this patch.

Acked-by: Sergei Shtylyov 
Signed-off-by: Bartlomiej Zolnierkiewicz

ide: falconide/q40ide - Use __ide_mm_{in,out}sw() for data

2009-04-08T12:12:48+00:00

Both of commits f94116aeec7a299640dd692128e1d22178affa8d ("ide: cleanup
") and 15a453a955f89f6545118770c669b52e925368bd ("ide: include
 only when needed") break falconide:

| Uniform Multi-Platform E-IDE driver
| ide: Falcon IDE controller
| Probing IDE interface ide0...
| hda: Sarge m68k, ATA DISK drive
| ide0 at 0xfff00000 on irq 15 (serialized)
| ide-gd driver 1.18
| hda: max request size: 128KiB
| hda: 2118816 sectors (1084 MB) w/256KiB Cache, CHS=2102/16/63
|  hda:<4>hda: lost interrupt

This happens because falconide relies on {in,out}sw() being redefined in
, as included by , which is no longer the case.
Use __ide_mm_{in,out}sw() from  instead, just like
ide_{in,out}put_data() do.

The same problem seems to exist in q40ide.

Signed-off-by: Geert Uytterhoeven 
Signed-off-by: Bartlomiej Zolnierkiewicz

ide: turn selectproc() method into dev_select() method (take 5)

2009-03-31T18:15:32+00:00

Turn selectproc() method into dev_select() method by teaching it to write to the
device register and moving it from 'struct ide_port_ops' to 'struct ide_tp_ops'.

Signed-off-by: Sergei Shtylyov 
Cc: benh@kernel.crashing.org
Cc: petkovbb@gmail.com
[bart: add ->dev_select to at91_ide.c and tx4939.c (__BIG_ENDIAN case)]
Signed-off-by: Bartlomiej Zolnierkiewicz

ide: turn set_irq() method into write_devctl() method

2009-03-31T18:15:30+00:00

Turn set_irq() method with its software reset hack into write_devctl() method
(for just writing a value into the device control register) at last...

Signed-off-by: Sergei Shtylyov 
Signed-off-by: Bartlomiej Zolnierkiewicz

ide: pass command instead of request to ide_pio_datablock()

2009-03-27T11:46:38+00:00

* Add IDE_TFLAG_FS taskfile flag and set it for REQ_TYPE_FS requests.

* Convert ->{in,out}put_data methods to take command instead of request
  as an argument.  Then convert pre_task_out_intr(), task_end_request(),
  task_error(), task_in_unexpected(), ide_pio_sector(), ide_pio_multi()
  and ide_pio_datablock() in similar way.

* Rename task_end_request() to ide_finish_cmd().

There should be no functional changes caused by this patch.

Signed-off-by: Bartlomiej Zolnierkiewicz