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@penguintechs.org>
Reported-by: Nicolas Schichan <nschichan@freebox.fr>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Link: https://lore.kernel.org/r/20210826172816.24478-1-kvalo@codeaurora.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

4 files changed, 6 insertions, 9 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 @@ exit_unprepare_channel:
 }
 
 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;