brcm2708: rename target to bcm27xx

[openwrt/staging/dedeckeh.git] / target / linux / brcm2708 / patches-4.19 / 950-0667-dwc_otg-use-align_buf-for-small-IN-control-transfers.patch

diff --git a/target/linux/brcm2708/patches-4.19/950-0667-dwc_otg-use-align_buf-for-small-IN-control-transfers.patch b/target/linux/brcm2708/patches-4.19/950-0667-dwc_otg-use-align_buf-for-small-IN-control-transfers.patch
deleted file mode 100644 (file)
index fbfef01..0000000
--- a/target/linux/brcm2708/patches-4.19/950-0667-dwc_otg-use-align_buf-for-small-IN-control-transfers.patch
+++ /dev/null
@@ -1,59 +0,0 @@
-From 0c6190fa3cfeafd773b51b751a473d6775c23309 Mon Sep 17 00:00:00 2001
-From: P33M <2474547+P33M@users.noreply.github.com>
-Date: Wed, 14 Aug 2019 14:35:50 +0100
-Subject: [PATCH] dwc_otg: use align_buf for small IN control transfers
- (#3150)
-
-The hardware will do a 4-byte write to memory on any IN packet received
-that is between 1 and 3 bytes long. This tramples memory in the uvcvideo
-driver, as it uses a sequence of 1- and 2-byte control transfers to
-query the min/max/range/step of each individual camera control and
-gives us buffers that are offsets into a struct.
-
-Catch small control transfers in the data phase and use the align_buf
-to bounce the correct number of bytes into the URB's buffer.
-
-In general, short packets on non-control endpoints should be OK as URBs
-should have enough buffer space for a wMaxPacket size transfer.
-
-See: https://github.com/raspberrypi/linux/issues/3148
-
-Signed-off-by: Jonathan Bell <jonathan@raspberrypi.org>
----
- drivers/usb/host/dwc_otg/dwc_otg_hcd.c | 18 ++++++++++++++++++
- 1 file changed, 18 insertions(+)
-
---- a/drivers/usb/host/dwc_otg/dwc_otg_hcd.c
-+++ b/drivers/usb/host/dwc_otg/dwc_otg_hcd.c
-@@ -1182,6 +1182,7 @@ static void assign_and_init_hc(dwc_otg_h
-       dwc_otg_qtd_t *qtd;
-       dwc_otg_hcd_urb_t *urb;
-       void* ptr = NULL;
-+      uint16_t wLength;
-       uint32_t intr_enable;
-       unsigned long flags;
-       gintmsk_data_t gintmsk = { .d32 = 0, };
-@@ -1293,6 +1294,23 @@ static void assign_and_init_hc(dwc_otg_h
-                       break;
-               case DWC_OTG_CONTROL_DATA:
-                       DWC_DEBUGPL(DBG_HCDV, "  Control data transaction\n");
-+                      /*
-+                       * Hardware bug: small IN packets with length < 4
-+                       * cause a 4-byte write to memory. We can only catch
-+                       * the case where we know a short packet is going to be
-+                       * returned in a control transfer, as the length is
-+                       * specified in the setup packet. This is only an issue
-+                       * for drivers that insist on packing a device's various
-+                       * properties into a struct and querying them one at a
-+                       * time (uvcvideo).
-+                       * Force the use of align_buf so that the subsequent
-+                       * memcpy puts the right number of bytes in the URB's
-+                       * buffer.
-+                       */
-+                      wLength = ((uint16_t *)urb->setup_packet)[3];
-+                      if (hc->ep_is_in && wLength < 4)
-+                              ptr = hc->xfer_buff;
-+
-                       hc->data_pid_start = qtd->data_toggle;
-                       break;
-               case DWC_OTG_CONTROL_STATUS: