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NFC: Modified hci_transceive to become an asynchronous operation

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This enables the completion callback to be called from a different
context, preventing a possible deadlock if the callback resulted in the
invocation of a nested call to the currently locked nfc_dev.
This is also more in line with the im_transceive nfc_ops for NFC Core or
NCI drivers which already behave asynchronously.

Signed-off-by: Eric Lapuyade <eric.lapuyade@intel.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
This commit is contained in:
Eric Lapuyade 2012-09-11 10:43:50 +02:00 • committed by Samuel Ortiz
parent e4c4789e55
commit f3e8fb5527
5 changed files with 92 additions and 39 deletions
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8
include/net/nfc/hci.h
View file

@ -38,8 +38,8 @@ struct nfc_hci_ops {
int (*complete_target_discovered) (struct nfc_hci_dev *hdev, u8 gate,
struct nfc_target *target);
int (*data_exchange) (struct nfc_hci_dev *hdev,
struct nfc_target *target,
struct sk_buff *skb, struct sk_buff **res_skb);
struct nfc_target *target, struct sk_buff *skb,
data_exchange_cb_t cb, void *cb_context);
int (*check_presence)(struct nfc_hci_dev *hdev,
struct nfc_target *target);
};
@ -103,6 +103,10 @@ struct nfc_hci_dev {
u8 hw_mpw;
u8 hw_software;
u8 hw_bsid;
int async_cb_type;
data_exchange_cb_t async_cb;
void *async_cb_context;
};
/* hci device allocation */