• Jia-Ju Bai's avatar
    xen: xen-pciback: Replace GFP_ATOMIC with GFP_KERNEL in xen_pcibk_config_quirks_init · 230d2114
    Jia-Ju Bai authored
    xen_pcibk_config_quirks_init() is never called in atomic context.
    
    The call chains ending up at xen_pcibk_config_quirks_init() are:
    [1] xen_pcibk_config_quirks_init() <- xen_pcibk_config_init_dev() <-
    	pcistub_init_device() <- pcistub_seize() <- pcistub_probe()
    [2] xen_pcibk_config_quirks_init() <- xen_pcibk_config_init_dev() <-
    	pcistub_init_device() <- pcistub_init_devices_late() <-
    	xen_pcibk_init()
    pcistub_probe() is only set as ".probe" in struct pci_driver.
    xen_pcibk_init() is is only set as a parameter of module_init().
    These functions are not called in atomic context.
    
    Despite never getting called from atomic context,
    xen_pcibk_config_quirks_init() calls kzalloc() with GFP_ATOMIC,
    which does not sleep for allocation.
    GFP_ATOMIC is not necessary and can be replaced with GFP_KERNEL,
    which can sleep and improve the possibility of sucessful allocation.
    Signed-off-by: default avatarJia-Ju Bai <baijiaju1990@gmail.com>
    Reviewed-by: default avatarBoris Ostrovsky <boris.ostrovsky@oracle.com>
    Signed-off-by: default avatarBoris Ostrovsky <boris.ostrovsky@oracle.com>
    230d2114
conf_space_quirks.c 3.09 KB