Trying to resolve ath9k issues with a patch from @SolidHal

This patch is untested. However it compiles fine.

It's supposed to resolve some issues stated in
#3

That said, since I don't have any Veyron Chromebook in hands, I cannot
test it directly.

Signed-off-by: Miouyouyou (Myy) <[email protected]>

GetPatchAndCompileKernel.sh

@@ -56,6 +56,7 @@ export KERNEL_PATCHES="
 0004-Remove-the-dependency-to-the-clk_mali-symbol.patch
 0005-drivers-mmc-dw-mci-rockchip-Handle-ASUS-Tinkerboard.patch
 0006-soc-rockchip-power-domain-export-idle-request.patch
+0007-drivers-wifi-ath9k-reverse-do-not-use-bulk-on-EP3-and-EP4.patch
 0100-media-Add-JPEG_RAW-format.patch
 0101-media-Add-controls-for-JPEG-quantization-tables.patch
 "

patches/kernel/v4.19/0007-drivers-wifi-ath9k-reverse-do-not-use-bulk-on-EP3-and-EP4.patch

@@ -0,0 +1,101 @@
+FROM: Solidhal <[email protected]>
+
+This patch reverses commit 2b721118b7821107757eb1d37af4b60e877b27e7, as can bee seen here:
+https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=2b721118b7821107757eb1d37af4b60e877b27e7
+
+This commit caused issues on veyron speedy with ath9k and dwc2 drivers. Any ath9k device (ar9271) 
+would intermittently work, most of the time ending in errors as can bee seen here:
+https://github.com/SolidHal/PrawnOS/issues/38
+This commit fixes that issue.
+This is only a temporary work around while a permenant fix is found, as this commit seems to only cause issues
+with dwc2
+
+diff --git a/drivers/net/wireless/ath/ath9k/hif_usb.c b/drivers/net/wireless/ath/ath9k/hif_usb.c
+--- b/drivers/net/wireless/ath/ath9k/hif_usb.c
++++ a/drivers/net/wireless/ath/ath9k/hif_usb.c
+@@ -115,10 +115,10 @@
+ 	cmd->skb = skb;
+ 	cmd->hif_dev = hif_dev;
+
++	usb_fill_bulk_urb(urb, hif_dev->udev,
++			 usb_sndbulkpipe(hif_dev->udev, USB_REG_OUT_PIPE),
+-	usb_fill_int_urb(urb, hif_dev->udev,
+-			 usb_sndintpipe(hif_dev->udev, USB_REG_OUT_PIPE),
+ 			 skb->data, skb->len,
++			 hif_usb_regout_cb, cmd);
+-			 hif_usb_regout_cb, cmd, 1);
+
+ 	usb_anchor_urb(urb, &hif_dev->regout_submitted);
+ 	ret = usb_submit_urb(urb, GFP_KERNEL);
+@@ -723,11 +723,11 @@
+ 			return;
+ 		}
+
++		usb_fill_bulk_urb(urb, hif_dev->udev,
++				 usb_rcvbulkpipe(hif_dev->udev,
+-		usb_fill_int_urb(urb, hif_dev->udev,
+-				 usb_rcvintpipe(hif_dev->udev,
+ 						 USB_REG_IN_PIPE),
+ 				 nskb->data, MAX_REG_IN_BUF_SIZE,
++				 ath9k_hif_usb_reg_in_cb, nskb);
+-				 ath9k_hif_usb_reg_in_cb, nskb, 1);
+ 	}
+
+ resubmit:
+@@ -909,11 +909,11 @@
+ 			goto err_skb;
+ 		}
+
++		usb_fill_bulk_urb(urb, hif_dev->udev,
++				  usb_rcvbulkpipe(hif_dev->udev,
+-		usb_fill_int_urb(urb, hif_dev->udev,
+-				  usb_rcvintpipe(hif_dev->udev,
+ 						  USB_REG_IN_PIPE),
+ 				  skb->data, MAX_REG_IN_BUF_SIZE,
++				  ath9k_hif_usb_reg_in_cb, skb);
+-				  ath9k_hif_usb_reg_in_cb, skb, 1);
+
+ 		/* Anchor URB */
+ 		usb_anchor_urb(urb, &hif_dev->reg_in_submitted);
+@@ -1031,7 +1031,9 @@
+
+ static int ath9k_hif_usb_dev_init(struct hif_device_usb *hif_dev)
+ {
++	struct usb_host_interface *alt = &hif_dev->interface->altsetting[0];
++	struct usb_endpoint_descriptor *endp;
++	int ret, idx;
+-	int ret;
+
+ 	ret = ath9k_hif_usb_download_fw(hif_dev);
+ 	if (ret) {
+@@ -1041,6 +1043,20 @@
+ 		return ret;
+ 	}
+
++	/* On downloading the firmware to the target, the USB descriptor of EP4
++	 * is 'patched' to change the type of the endpoint to Bulk. This will
++	 * bring down CPU usage during the scan period.
++	 */
++	for (idx = 0; idx < alt->desc.bNumEndpoints; idx++) {
++		endp = &alt->endpoint[idx].desc;
++		if ((endp->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK)
++				== USB_ENDPOINT_XFER_INT) {
++			endp->bmAttributes &= ~USB_ENDPOINT_XFERTYPE_MASK;
++			endp->bmAttributes |= USB_ENDPOINT_XFER_BULK;
++			endp->bInterval = 0;
++		}
++	}
++
+ 	/* Alloc URBs */
+ 	ret = ath9k_hif_usb_alloc_urbs(hif_dev);
+ 	if (ret) {
+@@ -1252,7 +1268,7 @@
+ 	if (!buf)
+ 		return;
+
++	ret = usb_bulk_msg(udev, usb_sndbulkpipe(udev, USB_REG_OUT_PIPE),
+-	ret = usb_interrupt_msg(udev, usb_sndintpipe(udev, USB_REG_OUT_PIPE),
+ 			   buf, 4, NULL, USB_MSG_TIMEOUT);
+ 	if (ret)
+ 		dev_err(&udev->dev, "ath9k_htc: USB reboot failed\n");
+