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author | Linus Torvalds <torvalds@linux-foundation.org> | 2011-10-25 13:25:22 +0200 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2011-10-25 13:25:22 +0200 |
commit | 8a9ea3237e7eb5c25f09e429ad242ae5a3d5ea22 (patch) | |
tree | a0a63398a9983667d52cbbbf4e2405b4f22b1d83 /net/nfc/core.c | |
parent | 1be025d3cb40cd295123af2c394f7229ef9b30ca (diff) | |
parent | 8b3408f8ee994973869d8ba32c5bf482bc4ddca4 (diff) | |
download | linux-3.10-8a9ea3237e7eb5c25f09e429ad242ae5a3d5ea22.tar.gz linux-3.10-8a9ea3237e7eb5c25f09e429ad242ae5a3d5ea22.tar.bz2 linux-3.10-8a9ea3237e7eb5c25f09e429ad242ae5a3d5ea22.zip |
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next: (1745 commits)
dp83640: free packet queues on remove
dp83640: use proper function to free transmit time stamping packets
ipv6: Do not use routes from locally generated RAs
|PATCH net-next] tg3: add tx_dropped counter
be2net: don't create multiple RX/TX rings in multi channel mode
be2net: don't create multiple TXQs in BE2
be2net: refactor VF setup/teardown code into be_vf_setup/clear()
be2net: add vlan/rx-mode/flow-control config to be_setup()
net_sched: cls_flow: use skb_header_pointer()
ipv4: avoid useless call of the function check_peer_pmtu
TCP: remove TCP_DEBUG
net: Fix driver name for mdio-gpio.c
ipv4: tcp: fix TOS value in ACK messages sent from TIME_WAIT
rtnetlink: Add missing manual netlink notification in dev_change_net_namespaces
ipv4: fix ipsec forward performance regression
jme: fix irq storm after suspend/resume
route: fix ICMP redirect validation
net: hold sock reference while processing tx timestamps
tcp: md5: add more const attributes
Add ethtool -g support to virtio_net
...
Fix up conflicts in:
- drivers/net/Kconfig:
The split-up generated a trivial conflict with removal of a
stale reference to Documentation/networking/net-modules.txt.
Remove it from the new location instead.
- fs/sysfs/dir.c:
Fairly nasty conflicts with the sysfs rb-tree usage, conflicting
with Eric Biederman's changes for tagged directories.
Diffstat (limited to 'net/nfc/core.c')
-rw-r--r-- | net/nfc/core.c | 83 |
1 files changed, 82 insertions, 1 deletions
diff --git a/net/nfc/core.c b/net/nfc/core.c index b6fd4e1f205..47e02c1b8c0 100644 --- a/net/nfc/core.c +++ b/net/nfc/core.c @@ -53,6 +53,80 @@ int nfc_printk(const char *level, const char *format, ...) EXPORT_SYMBOL(nfc_printk); /** + * nfc_dev_up - turn on the NFC device + * + * @dev: The nfc device to be turned on + * + * The device remains up until the nfc_dev_down function is called. + */ +int nfc_dev_up(struct nfc_dev *dev) +{ + int rc = 0; + + nfc_dbg("dev_name=%s", dev_name(&dev->dev)); + + device_lock(&dev->dev); + + if (!device_is_registered(&dev->dev)) { + rc = -ENODEV; + goto error; + } + + if (dev->dev_up) { + rc = -EALREADY; + goto error; + } + + if (dev->ops->dev_up) + rc = dev->ops->dev_up(dev); + + if (!rc) + dev->dev_up = true; + +error: + device_unlock(&dev->dev); + return rc; +} + +/** + * nfc_dev_down - turn off the NFC device + * + * @dev: The nfc device to be turned off + */ +int nfc_dev_down(struct nfc_dev *dev) +{ + int rc = 0; + + nfc_dbg("dev_name=%s", dev_name(&dev->dev)); + + device_lock(&dev->dev); + + if (!device_is_registered(&dev->dev)) { + rc = -ENODEV; + goto error; + } + + if (!dev->dev_up) { + rc = -EALREADY; + goto error; + } + + if (dev->polling || dev->remote_activated) { + rc = -EBUSY; + goto error; + } + + if (dev->ops->dev_down) + dev->ops->dev_down(dev); + + dev->dev_up = false; + +error: + device_unlock(&dev->dev); + return rc; +} + +/** * nfc_start_poll - start polling for nfc targets * * @dev: The nfc device that must start polling @@ -144,6 +218,8 @@ int nfc_activate_target(struct nfc_dev *dev, u32 target_idx, u32 protocol) } rc = dev->ops->activate_target(dev, target_idx, protocol); + if (!rc) + dev->remote_activated = true; error: device_unlock(&dev->dev); @@ -170,6 +246,7 @@ int nfc_deactivate_target(struct nfc_dev *dev, u32 target_idx) } dev->ops->deactivate_target(dev, target_idx); + dev->remote_activated = false; error: device_unlock(&dev->dev); @@ -322,7 +399,9 @@ struct nfc_dev *nfc_get_device(unsigned idx) * @supported_protocols: NFC protocols supported by the device */ struct nfc_dev *nfc_allocate_device(struct nfc_ops *ops, - u32 supported_protocols) + u32 supported_protocols, + int tx_headroom, + int tx_tailroom) { static atomic_t dev_no = ATOMIC_INIT(0); struct nfc_dev *dev; @@ -345,6 +424,8 @@ struct nfc_dev *nfc_allocate_device(struct nfc_ops *ops, dev->ops = ops; dev->supported_protocols = supported_protocols; + dev->tx_headroom = tx_headroom; + dev->tx_tailroom = tx_tailroom; spin_lock_init(&dev->targets_lock); nfc_genl_data_init(&dev->genl_data); |