* [Qemu-devel] [PATCH] ide: avoid referencing NULL dev in rotational rate setting
@ 2017-10-20 9:14 Daniel P. Berrange
2017-10-20 9:34 ` [Qemu-devel] [Qemu-block] " Stefan Hajnoczi
2017-10-24 7:43 ` [Qemu-devel] " Daniel P. Berrange
0 siblings, 2 replies; 4+ messages in thread
From: Daniel P. Berrange @ 2017-10-20 9:14 UTC (permalink / raw)
To: qemu-devel; +Cc: Paolo Bonzini, qemu-block, Kevin Wolf, Daniel P. Berrange
The 'dev' variable can be NULL when the guest OS calls identify on an IDE
unit that does not have a drive attached to it.
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
---
hw/ide/core.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/hw/ide/core.c b/hw/ide/core.c
index a04766aee7..471d0c928b 100644
--- a/hw/ide/core.c
+++ b/hw/ide/core.c
@@ -208,7 +208,9 @@ static void ide_identify(IDEState *s)
if (dev && dev->conf.discard_granularity) {
put_le16(p + 169, 1); /* TRIM support */
}
- put_le16(p + 217, dev->rotation_rate); /* Nominal media rotation rate */
+ if (dev) {
+ put_le16(p + 217, dev->rotation_rate); /* Nominal media rotation rate */
+ }
ide_identify_size(s);
s->identify_set = 1;
--
2.13.6
^ permalink raw reply related [flat|nested] 4+ messages in thread* Re: [Qemu-devel] [Qemu-block] [PATCH] ide: avoid referencing NULL dev in rotational rate setting
2017-10-20 9:14 [Qemu-devel] [PATCH] ide: avoid referencing NULL dev in rotational rate setting Daniel P. Berrange
@ 2017-10-20 9:34 ` Stefan Hajnoczi
2017-10-24 7:43 ` [Qemu-devel] " Daniel P. Berrange
1 sibling, 0 replies; 4+ messages in thread
From: Stefan Hajnoczi @ 2017-10-20 9:34 UTC (permalink / raw)
To: Daniel P. Berrange; +Cc: qemu-devel, Kevin Wolf, Paolo Bonzini, qemu-block
On Fri, Oct 20, 2017 at 10:14:03AM +0100, Daniel P. Berrange wrote:
> The 'dev' variable can be NULL when the guest OS calls identify on an IDE
> unit that does not have a drive attached to it.
>
> Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
> ---
> hw/ide/core.c | 4 +++-
> 1 file changed, 3 insertions(+), 1 deletion(-)
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [Qemu-devel] [PATCH] ide: avoid referencing NULL dev in rotational rate setting
2017-10-20 9:14 [Qemu-devel] [PATCH] ide: avoid referencing NULL dev in rotational rate setting Daniel P. Berrange
2017-10-20 9:34 ` [Qemu-devel] [Qemu-block] " Stefan Hajnoczi
@ 2017-10-24 7:43 ` Daniel P. Berrange
2017-10-24 12:20 ` [Qemu-devel] [Qemu-block] " Stefan Hajnoczi
1 sibling, 1 reply; 4+ messages in thread
From: Daniel P. Berrange @ 2017-10-24 7:43 UTC (permalink / raw)
To: qemu-devel, John Snow; +Cc: Paolo Bonzini, qemu-block, Kevin Wolf
CC John
On Fri, Oct 20, 2017 at 10:14:03AM +0100, Daniel P. Berrange wrote:
> The 'dev' variable can be NULL when the guest OS calls identify on an IDE
> unit that does not have a drive attached to it.
>
> Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
> ---
> hw/ide/core.c | 4 +++-
> 1 file changed, 3 insertions(+), 1 deletion(-)
>
> diff --git a/hw/ide/core.c b/hw/ide/core.c
> index a04766aee7..471d0c928b 100644
> --- a/hw/ide/core.c
> +++ b/hw/ide/core.c
> @@ -208,7 +208,9 @@ static void ide_identify(IDEState *s)
> if (dev && dev->conf.discard_granularity) {
> put_le16(p + 169, 1); /* TRIM support */
> }
> - put_le16(p + 217, dev->rotation_rate); /* Nominal media rotation rate */
> + if (dev) {
> + put_le16(p + 217, dev->rotation_rate); /* Nominal media rotation rate */
> + }
>
> ide_identify_size(s);
> s->identify_set = 1;
> --
> 2.13.6
>
Regards,
Daniel
--
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^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2017-10-24 12:28 UTC | newest]
Thread overview: 4+ messages (download: mbox.gz follow: Atom feed
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2017-10-20 9:14 [Qemu-devel] [PATCH] ide: avoid referencing NULL dev in rotational rate setting Daniel P. Berrange
2017-10-20 9:34 ` [Qemu-devel] [Qemu-block] " Stefan Hajnoczi
2017-10-24 7:43 ` [Qemu-devel] " Daniel P. Berrange
2017-10-24 12:20 ` [Qemu-devel] [Qemu-block] " Stefan Hajnoczi
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