diff options
author | Sebastian Ott <sebott@linux.vnet.ibm.com> | 2013-06-05 16:06:42 +0200 |
---|---|---|
committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2013-06-26 21:10:07 +0200 |
commit | 4bee2a5dce45096851cb8694d962bf8c016816a8 (patch) | |
tree | 282a39310da585ad5e88d57791bfba728ed46280 /drivers/pci | |
parent | 944239c59e93a2a76c0c0dfa473700f82572e17d (diff) | |
download | linux-4bee2a5dce45096851cb8694d962bf8c016816a8.tar.bz2 |
s390/pci: cleanup hotplug code
Provide wrappers for the [de]configure operations, add some error
handling, and use pci_scan_slot instead of pci_scan_single_device.
Reviewed-by: Gerald Schaefer <gerald.schaefer@de.ibm.com>
Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'drivers/pci')
-rw-r--r-- | drivers/pci/hotplug/s390_pci_hpc.c | 53 |
1 files changed, 40 insertions, 13 deletions
diff --git a/drivers/pci/hotplug/s390_pci_hpc.c b/drivers/pci/hotplug/s390_pci_hpc.c index 46a7b738f61f..b12acaad9dc6 100644 --- a/drivers/pci/hotplug/s390_pci_hpc.c +++ b/drivers/pci/hotplug/s390_pci_hpc.c @@ -41,6 +41,28 @@ struct slot { struct zpci_dev *zdev; }; +static inline int slot_configure(struct slot *slot) +{ + int ret = sclp_pci_configure(slot->zdev->fid); + + zpci_dbg(3, "conf fid:%x, rc:%d\n", slot->zdev->fid, ret); + if (!ret) + slot->zdev->state = ZPCI_FN_STATE_CONFIGURED; + + return ret; +} + +static inline int slot_deconfigure(struct slot *slot) +{ + int ret = sclp_pci_deconfigure(slot->zdev->fid); + + zpci_dbg(3, "deconf fid:%x, rc:%d\n", slot->zdev->fid, ret); + if (!ret) + slot->zdev->state = ZPCI_FN_STATE_STANDBY; + + return ret; +} + static int enable_slot(struct hotplug_slot *hotplug_slot) { struct slot *slot = hotplug_slot->private; @@ -49,14 +71,23 @@ static int enable_slot(struct hotplug_slot *hotplug_slot) if (slot->zdev->state != ZPCI_FN_STATE_STANDBY) return -EIO; - rc = sclp_pci_configure(slot->zdev->fid); - zpci_dbg(3, "conf fid:%x, rc:%d\n", slot->zdev->fid, rc); - if (!rc) { - slot->zdev->state = ZPCI_FN_STATE_CONFIGURED; - /* automatically scan the device after is was configured */ - zpci_enable_device(slot->zdev); - zpci_scan_device(slot->zdev); - } + rc = slot_configure(slot); + if (rc) + return rc; + + rc = zpci_enable_device(slot->zdev); + if (rc) + goto out_deconfigure; + + slot->zdev->state = ZPCI_FN_STATE_ONLINE; + + pci_scan_slot(slot->zdev->bus, ZPCI_DEVFN); + pci_bus_add_devices(slot->zdev->bus); + + return rc; + +out_deconfigure: + slot_deconfigure(slot); return rc; } @@ -74,11 +105,7 @@ static int disable_slot(struct hotplug_slot *hotplug_slot) /* TODO: we rely on the user to unbind/remove the device, is that plausible * or do we need to trigger that here? */ - rc = sclp_pci_deconfigure(slot->zdev->fid); - zpci_dbg(3, "deconf fid:%x, rc:%d\n", slot->zdev->fid, rc); - if (!rc) - slot->zdev->state = ZPCI_FN_STATE_STANDBY; - return rc; + return slot_deconfigure(slot); } static int get_power_status(struct hotplug_slot *hotplug_slot, u8 *value) |