From: Alex Elder <elder@linaro.org>
To: davem@davemloft.net, edumazet@google.com, kuba@kernel.org,
pabeni@redhat.com
Cc: mka@chromium.org, andersson@kernel.org,
quic_cpratapa@quicinc.com, quic_avuyyuru@quicinc.com,
quic_jponduru@quicinc.com, quic_subashab@quicinc.com,
elder@kernel.org, netdev@vger.kernel.org,
linux-arm-msm@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: [PATCH net-next 6/6] net: ipa: don't bother zeroing an already zero register
Date: Fri, 23 Feb 2024 07:39:30 -0600 [thread overview]
Message-ID: <20240223133930.582041-7-elder@linaro.org> (raw)
In-Reply-To: <20240223133930.582041-1-elder@linaro.org>
In ipa_interrupt_suspend_clear_all(), if the SUSPEND_INFO register
read contains no set bits, there's no interrupt condition to clear.
Skip the write to the clear register in that case.
Signed-off-by: Alex Elder <elder@linaro.org>
---
drivers/net/ipa/ipa_interrupt.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/net/ipa/ipa_interrupt.c b/drivers/net/ipa/ipa_interrupt.c
index 501962cc4e90f..4d80bf77a5323 100644
--- a/drivers/net/ipa/ipa_interrupt.c
+++ b/drivers/net/ipa/ipa_interrupt.c
@@ -59,7 +59,7 @@ static void ipa_interrupt_suspend_clear_all(struct ipa_interrupt *interrupt)
val = ioread32(ipa->reg_virt + reg_n_offset(reg, unit));
/* SUSPEND interrupt status isn't cleared on IPA version 3.0 */
- if (ipa->version == IPA_VERSION_3_0)
+ if (!val || ipa->version == IPA_VERSION_3_0)
continue;
reg = ipa_reg(ipa, IRQ_SUSPEND_CLR);
--
2.40.1
next prev parent reply other threads:[~2024-02-23 13:39 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-02-23 13:39 [PATCH net-next 0/6] net: ipa: don't abort system suspend Alex Elder
2024-02-23 13:39 ` [PATCH net-next 1/6] net: ipa: don't bother aborting system resume Alex Elder
2024-02-27 10:23 ` Paolo Abeni
2024-02-23 13:39 ` [PATCH net-next 2/6] net: ipa: kill IPA_POWER_FLAG_SYSTEM Alex Elder
2024-02-23 13:39 ` [PATCH net-next 3/6] net: ipa: kill the IPA_POWER_FLAG_RESUMED flag Alex Elder
2024-02-23 13:39 ` [PATCH net-next 4/6] net: ipa: move ipa_interrupt_suspend_clear_all() up Alex Elder
2024-02-23 13:39 ` [PATCH net-next 5/6] net: ipa: kill ipa_power_suspend_handler() Alex Elder
2024-02-23 13:39 ` Alex Elder [this message]
2024-02-27 10:30 ` [PATCH net-next 0/6] net: ipa: don't abort system suspend patchwork-bot+netdevbpf
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