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i2400m/usb: wrap USB power saving in #ifdef CONFIG_PM 

Current code was assuming PM was always enabled, which is not
correct. Code which accesses members in the struct usb_device that are
dependant on CONFIG_PM must be protected the same.

Reported by Randy Dunlap from a build error in the linux-next tree on
07/01/2009.

Signed-off-by: Inaky Perez-Gonzalez <inaky@linux.intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Inaky Perez-Gonzalez 2009-01-08 11:08:25 -08:00 committed by David S. Miller
parent a2e9da4b09
commit 9fd7a1d92b
1 changed files with 6 additions and 0 deletions
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6
drivers/net/wimax/i2400m/usb.c
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@ -397,11 +397,13 @@ int i2400mu_probe(struct usb_interface *iface,
i2400m->bus_fw_name = I2400MU_FW_FILE_NAME;
i2400m->bus_bm_mac_addr_impaired = 0;
#ifdef CONFIG_PM
iface->needs_remote_wakeup = 1; /* autosuspend (15s delay) */
device_init_wakeup(dev, 1);
usb_autopm_enable(i2400mu->usb_iface);
usb_dev->autosuspend_delay = 15 * HZ;
usb_dev->autosuspend_disabled = 0;
#endif
result = i2400m_setup(i2400m, I2400M_BRI_MAC_REINIT);
if (result < 0) {
@ -493,7 +495,9 @@ int i2400mu_suspend(struct usb_interface *iface, pm_message_t pm_msg)
int result = 0;
struct device *dev = &iface->dev;
struct i2400mu *i2400mu = usb_get_intfdata(iface);
#ifdef CONFIG_PM
struct usb_device *usb_dev = i2400mu->usb_dev;
#endif
struct i2400m *i2400m = &i2400mu->i2400m;
d_fnstart(3, dev, "(iface %p pm_msg %u)\n", iface, pm_msg.event);
@ -503,11 +507,13 @@ int i2400mu_suspend(struct usb_interface *iface, pm_message_t pm_msg)
atomic_dec(&i2400mu->do_autopm);
result = i2400m_cmd_enter_powersave(i2400m);
atomic_inc(&i2400mu->do_autopm);
#ifdef CONFIG_PM
if (result < 0 && usb_dev->auto_pm == 0) {
/* System suspend, can't fail */
dev_err(dev, "failed to suspend, will reset on resume\n");
result = 0;
}
#endif
if (result < 0)
goto error_enter_powersave;
i2400mu_notification_release(i2400mu);