diff options
Diffstat (limited to 'drivers/platform/x86/p2sb.c')
-rw-r--r-- | drivers/platform/x86/p2sb.c | 46 |
1 files changed, 20 insertions, 26 deletions
diff --git a/drivers/platform/x86/p2sb.c b/drivers/platform/x86/p2sb.c index 3d66e1d4eb1f..31f38309b389 100644 --- a/drivers/platform/x86/p2sb.c +++ b/drivers/platform/x86/p2sb.c @@ -24,7 +24,7 @@ #define SPI_DEVFN_GOLDMONT PCI_DEVFN(13, 2) static const struct x86_cpu_id p2sb_cpu_ids[] = { - X86_MATCH_INTEL_FAM6_MODEL(ATOM_GOLDMONT, P2SB_DEVFN_GOLDMONT), + X86_MATCH_VFM(INTEL_ATOM_GOLDMONT, P2SB_DEVFN_GOLDMONT), {} }; @@ -43,7 +43,7 @@ struct p2sb_res_cache { static struct p2sb_res_cache p2sb_resources[NR_P2SB_RES_CACHE]; -static int p2sb_get_devfn(unsigned int *devfn) +static void p2sb_get_devfn(unsigned int *devfn) { unsigned int fn = P2SB_DEVFN_DEFAULT; const struct x86_cpu_id *id; @@ -53,15 +53,11 @@ static int p2sb_get_devfn(unsigned int *devfn) fn = (unsigned int)id->driver_data; *devfn = fn; - return 0; } -static bool p2sb_valid_resource(struct resource *res) +static bool p2sb_valid_resource(const struct resource *res) { - if (res->flags) - return true; - - return false; + return res->flags & ~IORESOURCE_UNSET; } /* Copy resource from the first BAR of the device in question */ @@ -135,9 +131,7 @@ static int p2sb_cache_resources(void) int ret; /* Get devfn for P2SB device itself */ - ret = p2sb_get_devfn(&devfn_p2sb); - if (ret) - return ret; + p2sb_get_devfn(&devfn_p2sb); bus = p2sb_get_bus(NULL); if (!bus) @@ -194,17 +188,13 @@ static int p2sb_cache_resources(void) int p2sb_bar(struct pci_bus *bus, unsigned int devfn, struct resource *mem) { struct p2sb_res_cache *cache; - int ret; bus = p2sb_get_bus(bus); if (!bus) return -ENODEV; - if (!devfn) { - ret = p2sb_get_devfn(&devfn); - if (ret) - return ret; - } + if (!devfn) + p2sb_get_devfn(&devfn); cache = &p2sb_resources[PCI_FUNC(devfn)]; if (cache->bus_dev_id != bus->dev.id) @@ -220,16 +210,20 @@ EXPORT_SYMBOL_GPL(p2sb_bar); static int __init p2sb_fs_init(void) { - p2sb_cache_resources(); - return 0; + return p2sb_cache_resources(); } /* - * pci_rescan_remove_lock to avoid access to unhidden P2SB devices can - * not be locked in sysfs pci bus rescan path because of deadlock. To - * avoid the deadlock, access to P2SB devices with the lock at an early - * step in kernel initialization and cache required resources. This - * should happen after subsys_initcall which initializes PCI subsystem - * and before device_initcall which requires P2SB resources. + * pci_rescan_remove_lock() can not be locked in sysfs PCI bus rescan path + * because of deadlock. To avoid the deadlock, access P2SB devices with the lock + * at an early step in kernel initialization and cache required resources. + * + * We want to run as early as possible. If the P2SB was assigned a bad BAR, + * we'll need to wait on pcibios_assign_resources() to fix it. So, our list of + * initcall dependencies looks something like this: + * + * ... + * subsys_initcall (pci_subsys_init) + * fs_initcall (pcibios_assign_resources) */ -fs_initcall(p2sb_fs_init); +fs_initcall_sync(p2sb_fs_init); |