xhci: Add a quirk for writing ERST in high-low order

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[ Upstream commit bc162403e3 ]

This quirk is for the controller that has a limitation in supporting
separate ERSTBA_HI and ERSTBA_LO programming. It's supported when
the ERSTBA is programmed ERSTBA_HI before ERSTBA_LO. That's because
the internal initialization of event ring fetches the
"Event Ring Segment Table Entry" based on the indication of ERSTBA_LO
written.

Signed-off-by: Daehwan Jung <dh10.jung@samsung.com>
Link: https://lore.kernel.org/r/1718019553-111939-3-git-send-email-dh10.jung@samsung.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Stable-dep-of: e5fa8db0be ("usb: xhci: fix loss of data on Cadence xHC")
Signed-off-by: Sasha Levin <sashal@kernel.org>

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Daehwan Jung 2024-06-10 20:39:12 +09:00 • committed by Greg Kroah-Hartman

parent 66cffb20a0

commit 72b2ef7bb3

2 changed files with 6 additions and 1 deletions

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5

drivers/usb/host/xhci-mem.c

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2

drivers/usb/host/xhci.h

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