xhci: fix event ring segment table related masks and variables in header

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[ Upstream commit 8c1cbec9db ]

xHC controller can supports up to 1024 interrupters.
To fit these change the max_interrupters varable from u8 to u16.

Add a separate mask for the reserve and preserve bits [5:0] in the erst
base register and use it instead of the ERST_PRT_MASK.
ERSR_PTR_MASK [3:0] is intended for masking bits in the
event ring dequeue pointer register.

Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Link: https://lore.kernel.org/r/20230202150505.618915-2-mathias.nyman@linux.intel.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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This commit is contained in:

Mathias Nyman 2023-02-02 17:04:55 +02:00 • committed by Greg Kroah-Hartman

parent 0bf337c41c

commit a646b4e596

2 changed files with 6 additions and 3 deletions

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4

drivers/usb/host/xhci-mem.c

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5

drivers/usb/host/xhci.h

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