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Message-Id: <20210826172816.24478-1-kvalo@codeaurora.org>
Date: Thu, 26 Aug 2021 20:28:16 +0300
From: Kalle Valo <kvalo@...eaurora.org>
To: netdev@...r.kernel.org
Cc: ath11k@...ts.infradead.org, linux-wireless@...r.kernel.org,
regressions@...ts.linux.dev, wt@...guintechs.org,
manivannan.sadhasivam@...aro.org, hemantk@...eaurora.org,
loic.poulain@...aro.org, nschichan@...ebox.fr
Subject: [PATCH] Revert "net: really fix the build..."
This reverts commit ce78ffa3ef1681065ba451cfd545da6126f5ca88.
Wren and Nicolas reported that ath11k was failing to initialise QCA6390
Wi-Fi 6 device with error:
qcom_mhi_qrtr: probe of mhi0_IPCR failed with error -22
Commit ce78ffa3ef16 ("net: really fix the build..."), introduced in
v5.14-rc5, caused this regression in qrtr. Most likely all ath11k
devices are broken, but I only tested QCA6390. Let's revert the broken
commit so that ath11k works again.
Reported-by: Wren Turkal <wt@...guintechs.org>
Reported-by: Nicolas Schichan <nschichan@...ebox.fr>
Signed-off-by: Kalle Valo <kvalo@...eaurora.org>
---
drivers/bus/mhi/core/internal.h | 2 +-
drivers/bus/mhi/core/main.c | 9 +++------
drivers/net/mhi/net.c | 2 +-
drivers/net/wwan/mhi_wwan_ctrl.c | 2 +-
include/linux/mhi.h | 7 +------
net/qrtr/mhi.c | 16 +---------------
6 files changed, 8 insertions(+), 30 deletions(-)
diff --git a/drivers/bus/mhi/core/internal.h b/drivers/bus/mhi/core/internal.h
index bc239a11aa69..5b9ea66b92dc 100644
--- a/drivers/bus/mhi/core/internal.h
+++ b/drivers/bus/mhi/core/internal.h
@@ -682,7 +682,7 @@ void mhi_rddm_prepare(struct mhi_controller *mhi_cntrl,
struct image_info *img_info);
void mhi_fw_load_handler(struct mhi_controller *mhi_cntrl);
int mhi_prepare_channel(struct mhi_controller *mhi_cntrl,
- struct mhi_chan *mhi_chan, unsigned int flags);
+ struct mhi_chan *mhi_chan);
int mhi_init_chan_ctxt(struct mhi_controller *mhi_cntrl,
struct mhi_chan *mhi_chan);
void mhi_deinit_chan_ctxt(struct mhi_controller *mhi_cntrl,
diff --git a/drivers/bus/mhi/core/main.c b/drivers/bus/mhi/core/main.c
index 84448233f64c..fc9196f11cb7 100644
--- a/drivers/bus/mhi/core/main.c
+++ b/drivers/bus/mhi/core/main.c
@@ -1430,7 +1430,7 @@ static void mhi_unprepare_channel(struct mhi_controller *mhi_cntrl,
}
int mhi_prepare_channel(struct mhi_controller *mhi_cntrl,
- struct mhi_chan *mhi_chan, unsigned int flags)
+ struct mhi_chan *mhi_chan)
{
int ret = 0;
struct device *dev = &mhi_chan->mhi_dev->dev;
@@ -1455,9 +1455,6 @@ int mhi_prepare_channel(struct mhi_controller *mhi_cntrl,
if (ret)
goto error_pm_state;
- if (mhi_chan->dir == DMA_FROM_DEVICE)
- mhi_chan->pre_alloc = !!(flags & MHI_CH_INBOUND_ALLOC_BUFS);
-
/* Pre-allocate buffer for xfer ring */
if (mhi_chan->pre_alloc) {
int nr_el = get_nr_avail_ring_elements(mhi_cntrl,
@@ -1613,7 +1610,7 @@ void mhi_reset_chan(struct mhi_controller *mhi_cntrl, struct mhi_chan *mhi_chan)
}
/* Move channel to start state */
-int mhi_prepare_for_transfer(struct mhi_device *mhi_dev, unsigned int flags)
+int mhi_prepare_for_transfer(struct mhi_device *mhi_dev)
{
int ret, dir;
struct mhi_controller *mhi_cntrl = mhi_dev->mhi_cntrl;
@@ -1624,7 +1621,7 @@ int mhi_prepare_for_transfer(struct mhi_device *mhi_dev, unsigned int flags)
if (!mhi_chan)
continue;
- ret = mhi_prepare_channel(mhi_cntrl, mhi_chan, flags);
+ ret = mhi_prepare_channel(mhi_cntrl, mhi_chan);
if (ret)
goto error_open_chan;
}
diff --git a/drivers/net/mhi/net.c b/drivers/net/mhi/net.c
index 11be6bcdd551..e60e38c1f09d 100644
--- a/drivers/net/mhi/net.c
+++ b/drivers/net/mhi/net.c
@@ -335,7 +335,7 @@ static int mhi_net_newlink(void *ctxt, struct net_device *ndev, u32 if_id,
u64_stats_init(&mhi_netdev->stats.tx_syncp);
/* Start MHI channels */
- err = mhi_prepare_for_transfer(mhi_dev, 0);
+ err = mhi_prepare_for_transfer(mhi_dev);
if (err)
goto out_err;
diff --git a/drivers/net/wwan/mhi_wwan_ctrl.c b/drivers/net/wwan/mhi_wwan_ctrl.c
index d0a98f34c54d..e4d0f696687f 100644
--- a/drivers/net/wwan/mhi_wwan_ctrl.c
+++ b/drivers/net/wwan/mhi_wwan_ctrl.c
@@ -110,7 +110,7 @@ static int mhi_wwan_ctrl_start(struct wwan_port *port)
int ret;
/* Start mhi device's channel(s) */
- ret = mhi_prepare_for_transfer(mhiwwan->mhi_dev, 0);
+ ret = mhi_prepare_for_transfer(mhiwwan->mhi_dev);
if (ret)
return ret;
diff --git a/include/linux/mhi.h b/include/linux/mhi.h
index 5e08468854db..944aa3aa3035 100644
--- a/include/linux/mhi.h
+++ b/include/linux/mhi.h
@@ -719,13 +719,8 @@ void mhi_device_put(struct mhi_device *mhi_dev);
* host and device execution environments match and
* channels are in a DISABLED state.
* @mhi_dev: Device associated with the channels
- * @flags: MHI channel flags
*/
-int mhi_prepare_for_transfer(struct mhi_device *mhi_dev,
- unsigned int flags);
-
-/* Automatically allocate and queue inbound buffers */
-#define MHI_CH_INBOUND_ALLOC_BUFS BIT(0)
+int mhi_prepare_for_transfer(struct mhi_device *mhi_dev);
/**
* mhi_unprepare_from_transfer - Reset UL and DL channels for data transfer.
diff --git a/net/qrtr/mhi.c b/net/qrtr/mhi.c
index 1dc955ca57d3..fa611678af05 100644
--- a/net/qrtr/mhi.c
+++ b/net/qrtr/mhi.c
@@ -15,7 +15,6 @@ struct qrtr_mhi_dev {
struct qrtr_endpoint ep;
struct mhi_device *mhi_dev;
struct device *dev;
- struct completion ready;
};
/* From MHI to QRTR */
@@ -51,10 +50,6 @@ static int qcom_mhi_qrtr_send(struct qrtr_endpoint *ep, struct sk_buff *skb)
struct qrtr_mhi_dev *qdev = container_of(ep, struct qrtr_mhi_dev, ep);
int rc;
- rc = wait_for_completion_interruptible(&qdev->ready);
- if (rc)
- goto free_skb;
-
if (skb->sk)
sock_hold(skb->sk);
@@ -84,7 +79,7 @@ static int qcom_mhi_qrtr_probe(struct mhi_device *mhi_dev,
int rc;
/* start channels */
- rc = mhi_prepare_for_transfer(mhi_dev, 0);
+ rc = mhi_prepare_for_transfer(mhi_dev);
if (rc)
return rc;
@@ -101,15 +96,6 @@ static int qcom_mhi_qrtr_probe(struct mhi_device *mhi_dev,
if (rc)
return rc;
- /* start channels */
- rc = mhi_prepare_for_transfer(mhi_dev, MHI_CH_INBOUND_ALLOC_BUFS);
- if (rc) {
- qrtr_endpoint_unregister(&qdev->ep);
- dev_set_drvdata(&mhi_dev->dev, NULL);
- return rc;
- }
-
- complete_all(&qdev->ready);
dev_dbg(qdev->dev, "Qualcomm MHI QRTR driver probed\n");
return 0;
--
2.20.1
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