bcm27xx: sync 5.4 patches with RPi Foundation

Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>

1 files changed, 0 insertions, 60 deletions

diff --git a/target/linux/bcm27xx/patches-5.4/950-0305-xhci-Use-more-event-ring-segment-table-entries.patch b/target/linux/bcm27xx/patches-5.4/950-0305-xhci-Use-more-event-ring-segment-table-entries.patch
deleted file mode 100644
index 4b4766f739..0000000000
--- a/target/linux/bcm27xx/patches-5.4/950-0305-xhci-Use-more-event-ring-segment-table-entries.patch
+++ /dev/null
@@ -1,60 +0,0 @@
-From 90c56c8f52c912aa6e990e63d953b6dbccea7250 Mon Sep 17 00:00:00 2001
-From: Jonathan Bell <jonathan@raspberrypi.org>
-Date: Tue, 13 Aug 2019 15:53:29 +0100
-Subject: [PATCH] xhci: Use more event ring segment table entries
-
-Users have reported log spam created by "Event Ring Full" xHC event
-TRBs. These are caused by interrupt latency in conjunction with a very
-busy set of devices on the bus. The errors are benign, but throughput
-will suffer as the xHC will pause processing of transfers until the
-event ring is drained by the kernel. Expand the number of event TRB slots
-available by increasing the number of event ring segments in the ERST.
-
-Controllers have a hardware-defined limit as to the number of ERST
-entries they can process, so make the actual number in use
-min(ERST_MAX_SEGS, hw_max).
-
-Signed-off-by: Jonathan Bell <jonathan@raspberrypi.org>
----
- drivers/usb/host/xhci-mem.c | 8 +++++---
- drivers/usb/host/xhci.h     | 4 ++--
- 2 files changed, 7 insertions(+), 5 deletions(-)
-
---- a/drivers/usb/host/xhci-mem.c
-+++ b/drivers/usb/host/xhci-mem.c
-@@ -2503,9 +2503,11 @@ int xhci_mem_init(struct xhci_hcd *xhci,
- 	 * Event ring setup: Allocate a normal ring, but also setup
- 	 * the event ring segment table (ERST).  Section 4.9.3.
- 	 */
-+	val2 = 1 << HCS_ERST_MAX(xhci->hcs_params2);
-+	val2 = min_t(unsigned int, ERST_MAX_SEGS, val2);
- 	xhci_dbg_trace(xhci, trace_xhci_dbg_init, "// Allocating event ring");
--	xhci->event_ring = xhci_ring_alloc(xhci, ERST_NUM_SEGS, 1, TYPE_EVENT,
--					0, flags);
-+	xhci->event_ring = xhci_ring_alloc(xhci, val2, 1, TYPE_EVENT,
-+					   0, flags);
- 	if (!xhci->event_ring)
- 		goto fail;
- 	if (xhci_check_trb_in_td_math(xhci) < 0)
-@@ -2518,7 +2520,7 @@ int xhci_mem_init(struct xhci_hcd *xhci,
- 	/* set ERST count with the number of entries in the segment table */
- 	val = readl(&xhci->ir_set->erst_size);
- 	val &= ERST_SIZE_MASK;
--	val |= ERST_NUM_SEGS;
-+	val |= val2;
- 	xhci_dbg_trace(xhci, trace_xhci_dbg_init,
- 			"// Write ERST size = %i to ir_set 0 (some bits preserved)",
- 			val);
---- a/drivers/usb/host/xhci.h
-+++ b/drivers/usb/host/xhci.h
-@@ -1649,8 +1649,8 @@ struct urb_priv {
-  * Each segment table entry is 4*32bits long.  1K seems like an ok size:
-  * (1K bytes * 8bytes/bit) / (4*32 bits) = 64 segment entries in the table,
-  * meaning 64 ring segments.
-- * Initial allocated size of the ERST, in number of entries */
--#define	ERST_NUM_SEGS	1
-+ * Maximum number of segments in the ERST */
-+#define	ERST_MAX_SEGS	8
- /* Initial allocated size of the ERST, in number of entries */
- #define	ERST_SIZE	64
- /* Initial number of event segment rings allocated */