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accounts/usbwallet: if a confirmation is pending, skip refresh

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This commit is contained in:
Péter Szilágyi 2017-03-23 17:04:39 +02:00
parent 26da6daaa9
commit 8ff7e55ab5
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GPG Key ID: E9AE538CEDF8293D
2 changed files with 16 additions and 3 deletions
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9
accounts/usbwallet/ledger_hub.go
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@ -58,7 +58,10 @@ type LedgerHub struct {
quit chan chan error
stateLock sync.RWMutex // Protects the internals of the hub from racey access
commsLock sync.RWMutex // Allows wallets to lock enumeration (TODO(karalabe): remove if hotplug lands on Windows)
// TODO(karalabe): remove if hotplug lands on Windows
commsPend int // Number of operations blocking enumeration
commsLock sync.Mutex // Lock protecting the pending counter and enumeration
}
// NewLedgerHub creates a new hardware wallet manager for Ledger devices.
@ -109,6 +112,10 @@ func (hub *LedgerHub) refreshWallets() {
// be to ditch enumeration in favor of hutplug events, but that don't work yet
// on Windows so if we need to hack it anyway, this is more elegant for now.
hub.commsLock.Lock()
if hub.commsPend > 0 { // A confirmation is pending, don't refresh
hub.commsLock.Unlock()
return
}
}
for _, info := range hid.Enumerate(0, 0) { // Can't enumerate directly, one valid ID is the 0 wildcard
for _, id := range ledgerDeviceIDs {

10
accounts/usbwallet/ledger_wallet.go
View File

@ -579,9 +579,15 @@ func (w *ledgerWallet) SignTx(account accounts.Account, tx *types.Transaction, c
// Ensure the device isn't screwed with while user confirmation is pending
// TODO(karalabe): remove if hotplug lands on Windows
w.hub.commsLock.RLock()
defer w.hub.commsLock.RUnlock()
w.hub.commsLock.Lock()
w.hub.commsPend++
w.hub.commsLock.Unlock()
defer func() {
w.hub.commsLock.Lock()
w.hub.commsPend--
w.hub.commsLock.Unlock()
}()
return w.ledgerSign(path, account.Address, tx, chainID)
}