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
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