diff options
| author | Geert Uytterhoeven <geert+renesas@glider.be> | 2015-02-23 16:37:24 +0100 |
|---|---|---|
| committer | Eduardo Valentin <edubezval@gmail.com> | 2015-02-24 14:56:42 -0400 |
| commit | 0b37a83a91e885250c68546ce7271ce722120c99 (patch) | |
| tree | 30af05e3cf65ae0ca9ecca44f02a473c55a40e2a /Kconfig | |
| parent | 12ca7188468ee29c4e717f73db4bf43c90954fc7 (diff) | |
thermal: rcar: Fix race condition between init and interrupt
As soon as the interrupt has been enabled by devm_request_irq(), the
interrupt routine may be called, depending on the current status of the
hardware.
However, at that point rcar_thermal_common hasn't been initialized
complely yet. E.g. rcar_thermal_common.base is still NULL, causing a
NULL pointer dereference:
Unable to handle kernel NULL pointer dereference at virtual address 0000000c
pgd = c0004000
[0000000c] *pgd=00000000
Internal error: Oops: 5 [#1] SMP ARM
CPU: 0 PID: 1 Comm: swapper/0 Not tainted 3.19.0-rc7-ape6evm-04564-gb6e46cb7cbe82389 #30
Hardware name: Generic R8A73A4 (Flattened Device Tree)
task: ee8953c0 ti: ee896000 task.ti: ee896000
PC is at rcar_thermal_irq+0x1c/0xf0
LR is at _raw_spin_lock_irqsave+0x48/0x54
Postpone the call to devm_request_irq() until all initialization has
been done to fix this.
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Acked-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
Diffstat (limited to 'Kconfig')
0 files changed, 0 insertions, 0 deletions