From ed5298c7d500abaf34ed7783969e953a1f028e5b Mon Sep 17 00:00:00 2001
From: Loic Poulain <loic.poulain@linaro.org>
Date: Mon, 28 Sep 2020 09:39:50 +0530
Subject: [PATCH] bus: mhi: Remove auto-start option
There is really no point having an auto-start for channels.
This is confusing for the device drivers, some have to enable the
channels, others don't have... and waste resources (e.g. pre allocated
buffers) that may never be used.
This is really up to the MHI device(channel) driver to manage the state
of its channels.
While at it, let's also remove the auto-start option from ath11k mhi
controller.
Signed-off-by: Loic Poulain <loic.poulain@linaro.org>
Acked-by: Kalle Valo <kvalo@codeaurora.org>
Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
[mani: clubbed ath11k change]
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
---
drivers/bus/mhi/core/init.c | 9 ---------
drivers/bus/mhi/core/internal.h | 1 -
drivers/net/wireless/ath/ath11k/mhi.c | 4 ----
include/linux/mhi.h | 2 --
4 files changed, 16 deletions(-)
diff --git a/drivers/bus/mhi/core/init.c b/drivers/bus/mhi/core/init.c
index 0ffdebde82657..381fdea2eb9fe 100644
--- a/drivers/bus/mhi/core/init.c
+++ b/drivers/bus/mhi/core/init.c
@@ -758,7 +758,6 @@ static int parse_ch_cfg(struct mhi_controller *mhi_cntrl,
mhi_chan->offload_ch = ch_cfg->offload_channel;
mhi_chan->db_cfg.reset_req = ch_cfg->doorbell_mode_switch;
mhi_chan->pre_alloc = ch_cfg->auto_queue;
- mhi_chan->auto_start = ch_cfg->auto_start;
/*
* If MHI host allocates buffers, then the channel direction
@@ -1160,11 +1159,6 @@ static int mhi_driver_probe(struct device *dev)
goto exit_probe;
ul_chan->xfer_cb = mhi_drv->ul_xfer_cb;
- if (ul_chan->auto_start) {
- ret = mhi_prepare_channel(mhi_cntrl, ul_chan);
- if (ret)
- goto exit_probe;
- }
}
ret = -EINVAL;
@@ -1198,9 +1192,6 @@ static int mhi_driver_probe(struct device *dev)
if (ret)
goto exit_probe;
- if (dl_chan && dl_chan->auto_start)
- mhi_prepare_channel(mhi_cntrl, dl_chan);
-
mhi_device_put(mhi_dev);
return ret;
diff --git a/drivers/bus/mhi/core/internal.h b/drivers/bus/mhi/core/internal.h
index 7989269ddd963..33c23203c5315 100644
--- a/drivers/bus/mhi/core/internal.h
+++ b/drivers/bus/mhi/core/internal.h
@@ -563,7 +563,6 @@ struct mhi_chan {
bool configured;
bool offload_ch;
bool pre_alloc;
- bool auto_start;
bool wake_capable;
};
diff --git a/drivers/net/wireless/ath/ath11k/mhi.c b/drivers/net/wireless/ath/ath11k/mhi.c
index aded9a719d51e..47a1ce1bee4f4 100644
--- a/drivers/net/wireless/ath/ath11k/mhi.c
+++ b/drivers/net/wireless/ath/ath11k/mhi.c
@@ -24,7 +24,6 @@ static struct mhi_channel_config ath11k_mhi_channels[] = {
.offload_channel = false,
.doorbell_mode_switch = false,
.auto_queue = false,
- .auto_start = false,
},
{
.num = 1,
@@ -39,7 +38,6 @@ static struct mhi_channel_config ath11k_mhi_channels[] = {
.offload_channel = false,
.doorbell_mode_switch = false,
.auto_queue = false,
- .auto_start = false,
},
{
.num = 20,
@@ -54,7 +52,6 @@ static struct mhi_channel_config ath11k_mhi_channels[] = {
.offload_channel = false,
.doorbell_mode_switch = false,
.auto_queue = false,
- .auto_start = true,
},
{
.num = 21,
@@ -69,7 +66,6 @@ static struct mhi_channel_config ath11k_mhi_channels[] = {
.offload_channel = false,
.doorbell_mode_switch = false,
.auto_queue = true,
- .auto_start = true,
},
};
diff --git a/include/linux/mhi.h b/include/linux/mhi.h
index d4841e5a5f458..6522a4adc7947 100644
--- a/include/linux/mhi.h
+++ b/include/linux/mhi.h
@@ -214,7 +214,6 @@ enum mhi_db_brst_mode {
* @offload_channel: The client manages the channel completely
* @doorbell_mode_switch: Channel switches to doorbell mode on M0 transition
* @auto_queue: Framework will automatically queue buffers for DL traffic
- * @auto_start: Automatically start (open) this channel
* @wake-capable: Channel capable of waking up the system
*/
struct mhi_channel_config {
@@ -232,7 +231,6 @@ struct mhi_channel_config {
bool offload_channel;
bool doorbell_mode_switch;
bool auto_queue;
- bool auto_start;
bool wake_capable;
};
--
2.30.2