* [PATCH net v2] net: ipa: skip suspend/resume activities if not set up
@ 2020-10-09 20:28 Alex Elder
2020-10-09 23:10 ` patchwork-bot+netdevbpf
0 siblings, 1 reply; 2+ messages in thread
From: Alex Elder @ 2020-10-09 20:28 UTC (permalink / raw)
To: davem, kuba
Cc: evgreen, subashab, cpratapa, bjorn.andersson, mka, netdev, linux-kernel
When processing a system suspend request we suspend modem endpoints
if they are enabled, and call ipa_cmd_tag_process() (which issues
IPA commands) to ensure the IPA pipeline is cleared. It is an error
to attempt to issue an IPA command before setup is complete, so this
is clearly a bug. But we also shouldn't suspend or resume any
endpoints that have not been set up.
Have ipa_endpoint_suspend() and ipa_endpoint_resume() immediately
return if setup hasn't completed, to avoid any attempt to configure
endpoints or issue IPA commands in that case.
Fixes: 84f9bd12d46d ("soc: qcom: ipa: IPA endpoints")
Tested-by: Matthias Kaehlcke <mka@chromium.org>
Signed-off-by: Alex Elder <elder@linaro.org>
---
v2: Patch posted alone (Jakub pointed out the other was unnecessary)
drivers/net/ipa/ipa_endpoint.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/drivers/net/ipa/ipa_endpoint.c b/drivers/net/ipa/ipa_endpoint.c
index b7efd7c95e9c8..ed60fa5bcdaca 100644
--- a/drivers/net/ipa/ipa_endpoint.c
+++ b/drivers/net/ipa/ipa_endpoint.c
@@ -1471,6 +1471,9 @@ void ipa_endpoint_resume_one(struct ipa_endpoint *endpoint)
void ipa_endpoint_suspend(struct ipa *ipa)
{
+ if (!ipa->setup_complete)
+ return;
+
if (ipa->modem_netdev)
ipa_modem_suspend(ipa->modem_netdev);
@@ -1482,6 +1485,9 @@ void ipa_endpoint_suspend(struct ipa *ipa)
void ipa_endpoint_resume(struct ipa *ipa)
{
+ if (!ipa->setup_complete)
+ return;
+
ipa_endpoint_resume_one(ipa->name_map[IPA_ENDPOINT_AP_COMMAND_TX]);
ipa_endpoint_resume_one(ipa->name_map[IPA_ENDPOINT_AP_LAN_RX]);
--
2.20.1
^ permalink raw reply related [flat|nested] 2+ messages in thread
* Re: [PATCH net v2] net: ipa: skip suspend/resume activities if not set up
2020-10-09 20:28 [PATCH net v2] net: ipa: skip suspend/resume activities if not set up Alex Elder
@ 2020-10-09 23:10 ` patchwork-bot+netdevbpf
0 siblings, 0 replies; 2+ messages in thread
From: patchwork-bot+netdevbpf @ 2020-10-09 23:10 UTC (permalink / raw)
To: Alex Elder
Cc: davem, kuba, evgreen, subashab, cpratapa, bjorn.andersson, mka,
netdev, linux-kernel
Hello:
This patch was applied to netdev/net.git (refs/heads/master):
On Fri, 9 Oct 2020 15:28:48 -0500 you wrote:
> When processing a system suspend request we suspend modem endpoints
> if they are enabled, and call ipa_cmd_tag_process() (which issues
> IPA commands) to ensure the IPA pipeline is cleared. It is an error
> to attempt to issue an IPA command before setup is complete, so this
> is clearly a bug. But we also shouldn't suspend or resume any
> endpoints that have not been set up.
>
> [...]
Here is the summary with links:
- [net,v2] net: ipa: skip suspend/resume activities if not set up
https://git.kernel.org/netdev/net/c/d17043828210
You are awesome, thank you!
--
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