* [PATCH 1/2] opal: Fix the overflow of message notifiers head array
@ 2015-02-10 17:14 Neelesh Gupta
2015-02-10 17:15 ` [PATCH 2/2] opal: Add message notifier unregister function Neelesh Gupta
2015-02-11 3:14 ` [PATCH 1/2] opal: Fix the overflow of message notifiers head array Michael Ellerman
0 siblings, 2 replies; 3+ messages in thread
From: Neelesh Gupta @ 2015-02-10 17:14 UTC (permalink / raw)
To: mpe, linuxppc-dev, benh
Signed-off-by: Neelesh Gupta <neelegup@linux.vnet.ibm.com>
Reviewed-by: Vasant Hegde <hegdevasant@linux.vnet.ibm.com>
---
arch/powerpc/platforms/powernv/opal.c | 12 ++++--------
1 file changed, 4 insertions(+), 8 deletions(-)
diff --git a/arch/powerpc/platforms/powernv/opal.c b/arch/powerpc/platforms/powernv/opal.c
index f10b9ec..2651e22 100644
--- a/arch/powerpc/platforms/powernv/opal.c
+++ b/arch/powerpc/platforms/powernv/opal.c
@@ -305,16 +305,12 @@ void opal_notifier_disable(void)
int opal_message_notifier_register(enum OpalMessageType msg_type,
struct notifier_block *nb)
{
- if (!nb) {
- pr_warning("%s: Invalid argument (%p)\n",
- __func__, nb);
- return -EINVAL;
- }
- if (msg_type > OPAL_MSG_TYPE_MAX) {
- pr_warning("%s: Invalid message type argument (%d)\n",
+ if (!nb || msg_type >= OPAL_MSG_TYPE_MAX) {
+ pr_warning("%s: Invalid arguments, msg_type:%d\n",
__func__, msg_type);
return -EINVAL;
}
+
return atomic_notifier_chain_register(
&opal_msg_notifier_head[msg_type], nb);
}
@@ -351,7 +347,7 @@ static void opal_handle_message(void)
type = be32_to_cpu(msg.msg_type);
/* Sanity check */
- if (type > OPAL_MSG_TYPE_MAX) {
+ if (type >= OPAL_MSG_TYPE_MAX) {
pr_warning("%s: Unknown message type: %u\n", __func__, type);
return;
}
^ permalink raw reply related [flat|nested] 3+ messages in thread* [PATCH 2/2] opal: Add message notifier unregister function
2015-02-10 17:14 [PATCH 1/2] opal: Fix the overflow of message notifiers head array Neelesh Gupta
@ 2015-02-10 17:15 ` Neelesh Gupta
2015-02-11 3:14 ` [PATCH 1/2] opal: Fix the overflow of message notifiers head array Michael Ellerman
1 sibling, 0 replies; 3+ messages in thread
From: Neelesh Gupta @ 2015-02-10 17:15 UTC (permalink / raw)
To: mpe, linuxppc-dev, benh
Provide an unregister interface for the opal message notifiers
to be called when not needed like during driver unload/remove.
Signed-off-by: Neelesh Gupta <neelegup@linux.vnet.ibm.com>
Reviewed-by: Vasant Hegde <hegdevasant@linux.vnet.ibm.com>
---
arch/powerpc/include/asm/opal.h | 2 ++
arch/powerpc/platforms/powernv/opal.c | 7 +++++++
2 files changed, 9 insertions(+)
diff --git a/arch/powerpc/include/asm/opal.h b/arch/powerpc/include/asm/opal.h
index eb95b67..70eb45f 100644
--- a/arch/powerpc/include/asm/opal.h
+++ b/arch/powerpc/include/asm/opal.h
@@ -940,6 +940,8 @@ extern int opal_notifier_unregister(struct notifier_block *nb);
extern int opal_message_notifier_register(enum OpalMessageType msg_type,
struct notifier_block *nb);
+extern int opal_message_notifier_unregister(enum OpalMessageType msg_type,
+ struct notifier_block *nb);
extern void opal_notifier_enable(void);
extern void opal_notifier_disable(void);
extern void opal_notifier_update_evt(uint64_t evt_mask, uint64_t evt_val);
diff --git a/arch/powerpc/platforms/powernv/opal.c b/arch/powerpc/platforms/powernv/opal.c
index 2651e22..6c108ce 100644
--- a/arch/powerpc/platforms/powernv/opal.c
+++ b/arch/powerpc/platforms/powernv/opal.c
@@ -315,6 +315,13 @@ int opal_message_notifier_register(enum OpalMessageType msg_type,
&opal_msg_notifier_head[msg_type], nb);
}
+int opal_message_notifier_unregister(enum OpalMessageType msg_type,
+ struct notifier_block *nb)
+{
+ return atomic_notifier_chain_unregister(
+ &opal_msg_notifier_head[msg_type], nb);
+}
+
static void opal_message_do_notify(uint32_t msg_type, void *msg)
{
/* notify subscribers */
^ permalink raw reply related [flat|nested] 3+ messages in thread* Re: [PATCH 1/2] opal: Fix the overflow of message notifiers head array
2015-02-10 17:14 [PATCH 1/2] opal: Fix the overflow of message notifiers head array Neelesh Gupta
2015-02-10 17:15 ` [PATCH 2/2] opal: Add message notifier unregister function Neelesh Gupta
@ 2015-02-11 3:14 ` Michael Ellerman
1 sibling, 0 replies; 3+ messages in thread
From: Michael Ellerman @ 2015-02-11 3:14 UTC (permalink / raw)
To: Neelesh Gupta; +Cc: linuxppc-dev
On Tue, 2015-02-10 at 22:44 +0530, Neelesh Gupta wrote:
You forgot to write the changelog.
> Signed-off-by: Neelesh Gupta <neelegup@linux.vnet.ibm.com>
> Reviewed-by: Vasant Hegde <hegdevasant@linux.vnet.ibm.com>
> ---
> arch/powerpc/platforms/powernv/opal.c | 12 ++++--------
> 1 file changed, 4 insertions(+), 8 deletions(-)
>
> diff --git a/arch/powerpc/platforms/powernv/opal.c b/arch/powerpc/platforms/powernv/opal.c
> index f10b9ec..2651e22 100644
> --- a/arch/powerpc/platforms/powernv/opal.c
> +++ b/arch/powerpc/platforms/powernv/opal.c
> @@ -305,16 +305,12 @@ void opal_notifier_disable(void)
> int opal_message_notifier_register(enum OpalMessageType msg_type,
> struct notifier_block *nb)
> {
> - if (!nb) {
> - pr_warning("%s: Invalid argument (%p)\n",
> - __func__, nb);
> - return -EINVAL;
> - }
> - if (msg_type > OPAL_MSG_TYPE_MAX) {
> - pr_warning("%s: Invalid message type argument (%d)\n",
> + if (!nb || msg_type >= OPAL_MSG_TYPE_MAX) {
> + pr_warning("%s: Invalid arguments, msg_type:%d\n",
> __func__, msg_type);
> return -EINVAL;
> }
> +
> return atomic_notifier_chain_register(
> &opal_msg_notifier_head[msg_type], nb);
> }
> @@ -351,7 +347,7 @@ static void opal_handle_message(void)
> type = be32_to_cpu(msg.msg_type);
>
> /* Sanity check */
> - if (type > OPAL_MSG_TYPE_MAX) {
> + if (type >= OPAL_MSG_TYPE_MAX) {
> pr_warning("%s: Unknown message type: %u\n", __func__, type);
> return;
> }
>
^ permalink raw reply [flat|nested] 3+ messages in thread
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2015-02-10 17:14 [PATCH 1/2] opal: Fix the overflow of message notifiers head array Neelesh Gupta
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2015-02-11 3:14 ` [PATCH 1/2] opal: Fix the overflow of message notifiers head array Michael Ellerman
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