[PATCH v2 2/2] powerpc/powernv: Skip registering log region when CONFIG_PRINTK=n

When CONFIG_PRINTK=n, log_buf_addr_get() returns NULL and log_buf_len_get()
return 0. Check for these return values and skip registering the dump buffer.

Signed-off-by: Pranith Kumar <redacted>
CC: Michael Ellerman <mpe@ellerman.id.au>
---
 arch/powerpc/platforms/powernv/opal.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/arch/powerpc/platforms/powernv/opal.c b/arch/powerpc/platforms/powernv/opal.c
index f10b9ec..1db119f0 100644
--- a/arch/powerpc/platforms/powernv/opal.c
+++ b/arch/powerpc/platforms/powernv/opal.c

@@ -667,7 +667,13 @@ static void __init opal_dump_region_init(void)
 
 	/* Register kernel log buffer */
 	addr = log_buf_addr_get();
+	if (addr == NULL)
+		return;
+
 	size = log_buf_len_get();
+	if (size == 0)
+		return;
+
 	rc = opal_register_dump_region(OPAL_DUMP_REGION_LOG_BUF,
 				       __pa(addr), size);
 	/* Don't warn if this is just an older OPAL that doesn't

-- 
1.9.1

On Wed, 2015-01-21 at 21:26 -0500, Pranith Kumar wrote:

When CONFIG_PRINTK=n, log_buf_addr_get() returns NULL and log_buf_len_get()
return 0. Check for these return values and skip registering the dump buffer.

Signed-off-by: Pranith Kumar <redacted>
CC: Michael Ellerman <mpe@ellerman.id.au>
---
 arch/powerpc/platforms/powernv/opal.c | 6 ++++++
 1 file changed, 6 insertions(+)

What changed since v1? I don't see anything?

cheers

On Thu, Jan 22, 2015 at 12:19 AM, Michael Ellerman [off-list ref] wrote:

On Wed, 2015-01-21 at 21:26 -0500, Pranith Kumar wrote:

quoted

When CONFIG_PRINTK=n, log_buf_addr_get() returns NULL and log_buf_len_get()
return 0. Check for these return values and skip registering the dump buffer.

Signed-off-by: Pranith Kumar <redacted>
CC: Michael Ellerman <mpe@ellerman.id.au>
---
 arch/powerpc/platforms/powernv/opal.c | 6 ++++++
 1 file changed, 6 insertions(+)

What changed since v1? I don't see anything?

Nothing in this patch but there is a v2 of the first patch in this
series, so had to resend this patch with a v2.

Thanks!
-- 
Pranith

Pranith Kumar [off-list ref] writes:

On Thu, Jan 22, 2015 at 12:19 AM, Michael Ellerman [off-list ref] wrote:

quoted

On Wed, 2015-01-21 at 21:26 -0500, Pranith Kumar wrote:

quoted

When CONFIG_PRINTK=n, log_buf_addr_get() returns NULL and log_buf_len_get()
return 0. Check for these return values and skip registering the dump buffer.

Signed-off-by: Pranith Kumar <redacted>
CC: Michael Ellerman <mpe@ellerman.id.au>
---
 arch/powerpc/platforms/powernv/opal.c | 6 ++++++
 1 file changed, 6 insertions(+)

What changed since v1? I don't see anything?

Nothing in this patch but there is a v2 of the first patch in this
series, so had to resend this patch with a v2.

You also missed my Reviewed-by :)

On Thu, Jan 22, 2015 at 5:35 PM, Stewart Smith
[off-list ref] wrote:

Pranith Kumar [off-list ref] writes:

quoted

On Thu, Jan 22, 2015 at 12:19 AM, Michael Ellerman [off-list ref] wrote:

quoted

On Wed, 2015-01-21 at 21:26 -0500, Pranith Kumar wrote:

quoted

When CONFIG_PRINTK=n, log_buf_addr_get() returns NULL and log_buf_len_get()
return 0. Check for these return values and skip registering the dump buffer.

Signed-off-by: Pranith Kumar <redacted>
CC: Michael Ellerman <mpe@ellerman.id.au>
---
 arch/powerpc/platforms/powernv/opal.c | 6 ++++++
 1 file changed, 6 insertions(+)

What changed since v1? I don't see anything?

Nothing in this patch but there is a v2 of the first patch in this
series, so had to resend this patch with a v2.

You also missed my Reviewed-by :)

Sincere apologies for the oversight. Maintainers, could you please add
this Reviewed-by tag when picking this up?

Reviewed-by: Stewart Smith <redacted>

Thanks!

-- 
Pranith

On Thu, 2015-01-22 at 23:03 -0500, Pranith Kumar wrote:

On Thu, Jan 22, 2015 at 5:35 PM, Stewart Smith
[off-list ref] wrote:

quoted

Pranith Kumar [off-list ref] writes:

quoted

On Thu, Jan 22, 2015 at 12:19 AM, Michael Ellerman [off-list ref] wrote:

quoted

On Wed, 2015-01-21 at 21:26 -0500, Pranith Kumar wrote:

quoted

When CONFIG_PRINTK=n, log_buf_addr_get() returns NULL and log_buf_len_get()
return 0. Check for these return values and skip registering the dump buffer.

Signed-off-by: Pranith Kumar <redacted>
CC: Michael Ellerman <mpe@ellerman.id.au>
---
 arch/powerpc/platforms/powernv/opal.c | 6 ++++++
 1 file changed, 6 insertions(+)

What changed since v1? I don't see anything?

Nothing in this patch but there is a v2 of the first patch in this
series, so had to resend this patch with a v2.

OK. You didn't send patch 1 to the this list though, so I only saw it on lkml.
Please don't do that in future.

quoted

You also missed my Reviewed-by :)

Sincere apologies for the oversight. Maintainers, could you please add
this Reviewed-by tag when picking this up?

Reviewed-by: Stewart Smith <redacted>

For future reference patchwork will catch these tags automatically. So if you
have forgotten to add them you can always reply to your own patch like you have
here and patchwork will detect them.

eg:

http://patchwork.ozlabs.org/patch/431648/mbox/

cheers