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staging: unisys: Lock visorchannels associated with devices 

A visorchannel associated with a device should have its writing to
the channel protected by a lock.

Fixes: b32c4997c ('staging: unisys: Move channel creation up the stack')
Signed-off-by: Tim Sell <Timothy.Sell@unisys.com>
Signed-off-by: Benjamin Romer <benjamin.romer@unisys.com>
Signed-off-by: David Kershner <david.kershner@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
David Kershner 2015-07-14 14:43:29 -04:00 committed by Greg Kroah-Hartman
parent 216c3e2c13
commit a3ef1a8e93
1 changed files with 5 additions and 4 deletions
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9
drivers/staging/unisys/visorbus/visorchipset.c
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@ -1247,10 +1247,11 @@ my_device_create(struct controlvm_message *inmsg)
POSTCODE_LINUX_4(DEVICE_CREATE_ENTRY_PC, dev_no, bus_no, POSTCODE_LINUX_4(DEVICE_CREATE_ENTRY_PC, dev_no, bus_no,
POSTCODE_SEVERITY_INFO); POSTCODE_SEVERITY_INFO);
visorchannel = visorchannel_create(cmd->create_device.channel_addr, visorchannel =
cmd->create_device.channel_bytes, visorchannel_create_with_lock(cmd->create_device.channel_addr,
GFP_KERNEL, cmd->create_device.channel_bytes,
cmd->create_device.data_type_uuid); GFP_KERNEL,
cmd->create_device.data_type_uuid);
if (!visorchannel) { if (!visorchannel) {
POSTCODE_LINUX_4(DEVICE_CREATE_FAILURE_PC, dev_no, bus_no, POSTCODE_LINUX_4(DEVICE_CREATE_FAILURE_PC, dev_no, bus_no,