]> git.hungrycats.org Git - linux/commit
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)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Tue, 27 Jan 2015 16:29:42 +0000 (08:29 -0800)
commit8db5755be1bf888ce3a2efd587e2a53043924a39
tree57d6614283cd3f7758958f85bc4be49f5bd08032
parentf0f49ab7a04ea0422c548d062979436db6b974b6
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