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[73.185.129.58]) by smtp.gmail.com with ESMTPSA id m15sm4647171ilh.6.2021.02.05.14.11.08 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 05 Feb 2021 14:11:08 -0800 (PST) From: Alex Elder To: davem@davemloft.net, kuba@kernel.org Cc: elder@kernel.org, evgreen@chromium.org, bjorn.andersson@linaro.org, cpratapa@codeaurora.org, subashab@codeaurora.org, netdev@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH net-next v2 2/7] net: ipa: synchronize NAPI only for suspend Date: Fri, 5 Feb 2021 16:10:55 -0600 Message-Id: <20210205221100.1738-3-elder@linaro.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20210205221100.1738-1-elder@linaro.org> References: <20210205221100.1738-1-elder@linaro.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org When stopping a channel, gsi_channel_stop() will ensure NAPI polling is complete when it calls napi_disable(). So there is no need to call napi_synchronize() in that case. Move the call to napi_synchronize() out of __gsi_channel_stop() and into gsi_channel_suspend(), so it's only used where needed. Signed-off-by: Alex Elder --- v2: - Return early to avoid blocks of indented code drivers/net/ipa/gsi.c | 18 ++++++++++-------- 1 file changed, 10 insertions(+), 8 deletions(-) diff --git a/drivers/net/ipa/gsi.c b/drivers/net/ipa/gsi.c index f0432c965168c..60eb765c53647 100644 --- a/drivers/net/ipa/gsi.c +++ b/drivers/net/ipa/gsi.c @@ -939,13 +939,7 @@ static int __gsi_channel_stop(struct gsi_channel *channel, bool stop) mutex_unlock(&gsi->mutex); - if (ret) - return ret; - - /* Ensure NAPI polling has finished. */ - napi_synchronize(&channel->napi); - - return 0; + return ret; } /* Stop a started channel */ @@ -987,8 +981,16 @@ void gsi_channel_reset(struct gsi *gsi, u32 channel_id, bool doorbell) int gsi_channel_suspend(struct gsi *gsi, u32 channel_id, bool stop) { struct gsi_channel *channel = &gsi->channel[channel_id]; + int ret; - return __gsi_channel_stop(channel, stop); + ret = __gsi_channel_stop(channel, stop); + if (ret) + return ret; + + /* Ensure NAPI polling has finished. */ + napi_synchronize(&channel->napi); + + return 0; } /* Resume a suspended channel (starting will be requested if STOPPED) */ -- 2.20.1