forked from pool/u-boot
Guillaume GARDET
529744c22f
OBS-URL: https://build.opensuse.org/request/show/802701 OBS-URL: https://build.opensuse.org/package/show/hardware:boot/u-boot?expand=0&rev=98
36 lines
1.3 KiB
Diff
36 lines
1.3 KiB
Diff
From 96a515925eddcb28645391a0605710cfa79e7351 Mon Sep 17 00:00:00 2001
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From: Sylwester Nawrocki <s.nawrocki@samsung.com>
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Date: Mon, 4 May 2020 14:45:14 +0200
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Subject: [PATCH] usb: xhci: Add missing cache flush in the scratchpad array
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initialization
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In current code there is no cache flush after initializing the scratchpad
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buffer array with the scratchpad buffer pointers. This leads to a failure
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of the "slot enable" command on the rpi4 board (Broadcom STB PCIe
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controller + VL805 USB hub) - the very first TRB transfer on the command
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ring fails and there is a timeout while waiting for the command completion
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event. After adding the missing cache flush everything seems to be working
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as expected.
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Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
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Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
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Reviewed-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
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---
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drivers/usb/host/xhci-mem.c | 3 +++
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1 file changed, 3 insertions(+)
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diff --git a/drivers/usb/host/xhci-mem.c b/drivers/usb/host/xhci-mem.c
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index 93450ee3b7..729bdc3c84 100644
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--- a/drivers/usb/host/xhci-mem.c
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+++ b/drivers/usb/host/xhci-mem.c
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@@ -393,6 +393,9 @@ static int xhci_scratchpad_alloc(struct xhci_ctrl *ctrl)
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scratchpad->sp_array[i] = cpu_to_le64(ptr);
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}
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+ xhci_flush_cache((uintptr_t)scratchpad->sp_array,
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+ sizeof(u64) * num_sp);
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+
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return 0;
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fail_sp3:
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