diff options
| author | Guenter Roeck <[email protected]> | 2014-10-17 12:30:58 -0700 |
|---|---|---|
| committer | David S. Miller <[email protected]> | 2014-10-17 23:52:08 -0400 |
| commit | b184e497f7fe2895b2175859e0cb21ae5d531555 (patch) | |
| tree | ea1d277d73e4388820caf1fab98f8d6f53f993dc /scripts/gdb/linux/proc.py | |
| parent | 643566d4b47e2956110e79c0e6f65db9b9ea42c6 (diff) | |
dsa: Fix conversion from host device to mii bus
Commit b4d2394d01bc ("dsa: Replace mii_bus with a generic host device")
replaces mii_bus with a generic host_dev, and introduces
dsa_host_dev_to_mii_bus() to support conversion from host_dev to mii_bus.
However, in some cases it uses to_mii_bus to perform that conversion.
Since host_dev is not the phy bus device but typically a platform device,
this fails and results in a crash with the affected drivers.
BUG: unable to handle kernel NULL pointer dereference at (null)
IP: [<ffffffff81781d35>] __mutex_lock_slowpath+0x75/0x100
PGD 406783067 PUD 406784067 PMD 0
Oops: 0002 [#1] SMP
...
Call Trace:
[<ffffffff810a538b>] ? pick_next_task_fair+0x61b/0x880
[<ffffffff81781de3>] mutex_lock+0x23/0x37
[<ffffffff81533244>] mdiobus_read+0x34/0x60
[<ffffffff8153b95a>] __mv88e6xxx_reg_read+0x8a/0xa0
[<ffffffff8153b9bc>] mv88e6xxx_reg_read+0x4c/0xa0
Fixes: b4d2394d01bc ("dsa: Replace mii_bus with a generic host device")
Cc: Alexander Duyck <[email protected]>
Signed-off-by: Guenter Roeck <[email protected]>
Acked-by: Alexander Duyck <[email protected]>
Acked-by: Florian Fainelli <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
Diffstat (limited to 'scripts/gdb/linux/proc.py')
0 files changed, 0 insertions, 0 deletions