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staging: unisys: visorbus: Consolidate controlvm channel creation.

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The functions to create the controlvm channel were disjointed and ignoring
information that was available. This patch consolidates it so it clearer
what is happening.

Signed-off-by: David Kershner <david.kershner@unisys.com>
Reviewed-by: Tim Sell <timothy.sell@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
David Kershner 2017-08-30 13:36:19 -04:00 committed by Greg Kroah-Hartman
parent eaec40a3d1
commit f1f537c2e7
1 changed files with 17 additions and 30 deletions
repo.diff.show_diff_stats Download patch file Download diff file Expand all files Collapse all files

47
drivers/staging/unisys/visorbus/visorchipset.c
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@ -1332,34 +1332,27 @@ static int unisys_vmcall(unsigned long tuple, unsigned long param)
}
}
static unsigned int issue_vmcall_io_controlvm_addr(u64 *control_addr,
u32 *control_bytes)
static int controlvm_channel_create(struct visorchipset_device *dev)
{
u64 physaddr;
struct visorchannel *chan;
u64 addr;
u32 size;
int err;
physaddr = virt_to_phys(&chipset_dev->controlvm_params);
err = unisys_vmcall(VMCALL_CONTROLVM_ADDR, physaddr);
err = unisys_vmcall(VMCALL_CONTROLVM_ADDR,
virt_to_phys(&dev->controlvm_params));
if (err)
return err;
*control_addr = chipset_dev->controlvm_params.address;
*control_bytes = chipset_dev->controlvm_params.channel_bytes;
addr = dev->controlvm_params.address;
size = dev->controlvm_params.channel_bytes;
chan = visorchannel_create_with_lock(addr, size, GFP_KERNEL,
&visor_controlvm_channel_guid);
if (!chan)
return -ENOMEM;
dev->controlvm_channel = chan;
return 0;
}
static u64 controlvm_get_channel_address(void)
{
u64 addr = 0;
u32 size = 0;
if (issue_vmcall_io_controlvm_addr(&addr, &size))
return 0;
return addr;
}
static void setup_crash_devices_work_queue(struct work_struct *work)
{
struct controlvm_message local_crash_bus_msg;
@ -1739,32 +1732,26 @@ static void controlvm_periodic_work(struct work_struct *work)
static int visorchipset_init(struct acpi_device *acpi_device)
{
int err = -ENODEV;
u64 addr;
struct visorchannel *controlvm_channel;
chipset_dev = kzalloc(sizeof(*chipset_dev), GFP_KERNEL);
if (!chipset_dev)
goto error;
addr = controlvm_get_channel_address();
if (!addr)
goto error;
err = controlvm_channel_create(chipset_dev);
if (err)
goto error_free_chipset_dev;
acpi_device->driver_data = chipset_dev;
chipset_dev->acpi_device = acpi_device;
chipset_dev->poll_jiffies = POLLJIFFIES_CONTROLVMCHANNEL_FAST;
controlvm_channel = visorchannel_create_with_lock(addr, 0, GFP_KERNEL,
&visor_controlvm_channel_guid);
if (!controlvm_channel)
goto error_free_chipset_dev;
chipset_dev->controlvm_channel = controlvm_channel;
err = sysfs_create_groups(&chipset_dev->acpi_device->dev.kobj,
visorchipset_dev_groups);
if (err < 0)
goto error_destroy_channel;
controlvm_channel = chipset_dev->controlvm_channel;
if (!visor_check_channel(visorchannel_get_header(controlvm_channel),
&visor_controlvm_channel_guid,
"controlvm",