[BUG] gma500: Possible sleep-in-atomic bugs in gma_resume_pci

[Jia-Ju Bai]

The driver may sleep under a spinlock, and the function call paths are:
gma_power_begin (acquire the spinlock)
   gma_resume_pci
     pci_set_power_state
       __pci_start_power_transition (drivers/pci/pci.c)
         msleep --> may sleep

gma_power_begin (acquire the spinlock)
   gma_resume_pci
     pci_enable_device
       pci_enable_device_flags (drivers/pci/pci.c)
         do_pci_enable_device
           pci_set_power_state
             __pci_start_power_transition
               msleep --> may sleep

A possible fix is to replace msleep with mdelay in 
__pci_start_power_transition in drivers/pci/pci.c.

These bugs are found by my static analysis tool and my code review.


Thanks,
Jia-Ju Bai