OHCI: add a quirk for ULi M5237 blocking on reset
authorArseny Solokha <asolokha@kb.kras.ru>
Sat, 6 Dec 2014 02:54:06 +0000 (09:54 +0700)
committerDanny Wood <danwood76@gmail.com>
Tue, 29 Jan 2019 13:06:01 +0000 (13:06 +0000)
commit051e7a8093787c639f24cec4eba996fc1814dfce
treeb3284af8206a47b580264875441445bdf47dda58
parent5ab6c597000fbcfffabcc716d301aa8918ccac04
OHCI: add a quirk for ULi M5237 blocking on reset

commit 56abcab833fafcfaeb2f5b25e0364c1dec45f53e upstream.

Commit 8dccddbc2368 ("OHCI: final fix for NVIDIA problems (I hope)")
introduced into 3.1.9 broke boot on e.g. Freescale P2020DS development
board. The code path that was previously specific to NVIDIA controllers
had then become taken for all chips.

However, the M5237 installed on the board wedges solid when accessing
its base+OHCI_FMINTERVAL register, making it impossible to boot any
kernel newer than 3.1.8 on this particular and apparently other similar
machines.

Don't readl() and writel() base+OHCI_FMINTERVAL on PCI ID 10b9:5237.

The patch is suitable for the -next tree as well as all maintained
kernels up to 3.2 inclusive.

Signed-off-by: Arseny Solokha <asolokha@kb.kras.ru>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
drivers/usb/host/pci-quirks.c