* [Qemu-devel] [PATCH][RESEND] pcnet: Do not receive external frames in loopback mode
@ 2010-10-19 15:03 Jan Kiszka
2010-11-17 10:18 ` [Qemu-devel] " Jan Kiszka
2010-11-21 15:18 ` [Qemu-devel] " Anthony Liguori
0 siblings, 2 replies; 3+ messages in thread
From: Jan Kiszka @ 2010-10-19 15:03 UTC (permalink / raw)
To: qemu-devel
While not explicitly stated in the spec, it was observed on real systems
that enabling loopback testing on the pcnet controller disables
reception of external frames. And some legacy software relies on it, so
provide this behavior.
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
---
hw/pcnet.c | 5 +++--
1 files changed, 3 insertions(+), 2 deletions(-)
diff --git a/hw/pcnet.c b/hw/pcnet.c
index b52935a..f970bda 100644
--- a/hw/pcnet.c
+++ b/hw/pcnet.c
@@ -1048,9 +1048,10 @@ ssize_t pcnet_receive(VLANClientState *nc, const uint8_t *buf, size_t size_)
int crc_err = 0;
int size = size_;
- if (CSR_DRX(s) || CSR_STOP(s) || CSR_SPND(s) || !size)
+ if (CSR_DRX(s) || CSR_STOP(s) || CSR_SPND(s) || !size ||
+ (CSR_LOOP(s) && !s->looptest)) {
return -1;
-
+ }
#ifdef PCNET_DEBUG
printf("pcnet_receive size=%d\n", size);
#endif
--
1.7.1
^ permalink raw reply related [flat|nested] 3+ messages in thread* [Qemu-devel] Re: [PATCH][RESEND] pcnet: Do not receive external frames in loopback mode
2010-10-19 15:03 [Qemu-devel] [PATCH][RESEND] pcnet: Do not receive external frames in loopback mode Jan Kiszka
@ 2010-11-17 10:18 ` Jan Kiszka
2010-11-21 15:18 ` [Qemu-devel] " Anthony Liguori
1 sibling, 0 replies; 3+ messages in thread
From: Jan Kiszka @ 2010-11-17 10:18 UTC (permalink / raw)
To: Anthony Liguori; +Cc: qemu-devel
Am 19.10.2010 17:03, Jan Kiszka wrote:
> While not explicitly stated in the spec, it was observed on real systems
> that enabling loopback testing on the pcnet controller disables
> reception of external frames. And some legacy software relies on it, so
> provide this behavior.
Ping.
>
> Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
> ---
> hw/pcnet.c | 5 +++--
> 1 files changed, 3 insertions(+), 2 deletions(-)
>
> diff --git a/hw/pcnet.c b/hw/pcnet.c
> index b52935a..f970bda 100644
> --- a/hw/pcnet.c
> +++ b/hw/pcnet.c
> @@ -1048,9 +1048,10 @@ ssize_t pcnet_receive(VLANClientState *nc, const uint8_t *buf, size_t size_)
> int crc_err = 0;
> int size = size_;
>
> - if (CSR_DRX(s) || CSR_STOP(s) || CSR_SPND(s) || !size)
> + if (CSR_DRX(s) || CSR_STOP(s) || CSR_SPND(s) || !size ||
> + (CSR_LOOP(s) && !s->looptest)) {
> return -1;
> -
> + }
> #ifdef PCNET_DEBUG
> printf("pcnet_receive size=%d\n", size);
> #endif
^ permalink raw reply [flat|nested] 3+ messages in thread* Re: [Qemu-devel] [PATCH][RESEND] pcnet: Do not receive external frames in loopback mode
2010-10-19 15:03 [Qemu-devel] [PATCH][RESEND] pcnet: Do not receive external frames in loopback mode Jan Kiszka
2010-11-17 10:18 ` [Qemu-devel] " Jan Kiszka
@ 2010-11-21 15:18 ` Anthony Liguori
1 sibling, 0 replies; 3+ messages in thread
From: Anthony Liguori @ 2010-11-21 15:18 UTC (permalink / raw)
To: Jan Kiszka; +Cc: qemu-devel
On 10/19/2010 10:03 AM, Jan Kiszka wrote:
> While not explicitly stated in the spec, it was observed on real systems
> that enabling loopback testing on the pcnet controller disables
> reception of external frames. And some legacy software relies on it, so
> provide this behavior.
>
> Signed-off-by: Jan Kiszka<jan.kiszka@siemens.com>
>
Applied. Thanks.
Regards,
Anthony Liguori
> ---
> hw/pcnet.c | 5 +++--
> 1 files changed, 3 insertions(+), 2 deletions(-)
>
> diff --git a/hw/pcnet.c b/hw/pcnet.c
> index b52935a..f970bda 100644
> --- a/hw/pcnet.c
> +++ b/hw/pcnet.c
> @@ -1048,9 +1048,10 @@ ssize_t pcnet_receive(VLANClientState *nc, const uint8_t *buf, size_t size_)
> int crc_err = 0;
> int size = size_;
>
> - if (CSR_DRX(s) || CSR_STOP(s) || CSR_SPND(s) || !size)
> + if (CSR_DRX(s) || CSR_STOP(s) || CSR_SPND(s) || !size ||
> + (CSR_LOOP(s)&& !s->looptest)) {
> return -1;
> -
> + }
> #ifdef PCNET_DEBUG
> printf("pcnet_receive size=%d\n", size);
> #endif
>
^ permalink raw reply [flat|nested] 3+ messages in thread
end of thread, other threads:[~2010-11-21 15:18 UTC | newest]
Thread overview: 3+ messages (download: mbox.gz follow: Atom feed
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2010-10-19 15:03 [Qemu-devel] [PATCH][RESEND] pcnet: Do not receive external frames in loopback mode Jan Kiszka
2010-11-17 10:18 ` [Qemu-devel] " Jan Kiszka
2010-11-21 15:18 ` [Qemu-devel] " Anthony Liguori
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