The device must not flip to page 1 while in interrupt lock causing
loss of connection or dead lock.
Protect from changes to page by adding lock where user can
change the page in CARDvSetRSPINF, vnt_configure and set_channel
Signed-off-by: Malcolm Priestley <[email protected]>
---
drivers/staging/vt6655/card.c | 5 +++++
drivers/staging/vt6655/channel.c | 6 ++++++
drivers/staging/vt6655/device_main.c | 6 ++++++
3 files changed, 17 insertions(+)
diff --git a/drivers/staging/vt6655/card.c b/drivers/staging/vt6655/card.c
index a079640..47801ca 100644
--- a/drivers/staging/vt6655/card.c
+++ b/drivers/staging/vt6655/card.c
@@ -670,6 +670,9 @@ void CARDvSetRSPINF(struct vnt_private *pDevice, u8 bb_type)
{
union vnt_phy_field_swap phy;
unsigned char byTxRate, byRsvTime; /* For OFDM */
+ unsigned long flags;
+
+ spin_lock_irqsave(&pDevice->lock, flags);
/* Set to Page1 */
MACvSelectPage1(pDevice->PortOffset);
@@ -767,6 +770,8 @@ void CARDvSetRSPINF(struct vnt_private *pDevice, u8 bb_type)
VNSvOutPortW(pDevice->PortOffset + MAC_REG_RSPINF_A_72, MAKEWORD(byTxRate, byRsvTime));
/* Set to Page0 */
MACvSelectPage0(pDevice->PortOffset);
+
+ spin_unlock_irqrestore(&pDevice->lock, flags);
}
void CARDvUpdateBasicTopRate(struct vnt_private *pDevice)
diff --git a/drivers/staging/vt6655/channel.c b/drivers/staging/vt6655/channel.c
index 70f8705..d593f5f 100644
--- a/drivers/staging/vt6655/channel.c
+++ b/drivers/staging/vt6655/channel.c
@@ -210,6 +210,10 @@ bool set_channel(void *pDeviceHandler, unsigned int uConnectionChannel)
BBvSoftwareReset(pDevice);
if (pDevice->byLocalID > REV_ID_VT3253_B1) {
+ unsigned long flags;
+
+ spin_lock_irqsave(&pDevice->lock, flags);
+
/* set HW default power register */
MACvSelectPage1(pDevice->PortOffset);
RFbSetPower(pDevice, RATE_1M, pDevice->byCurrentCh);
@@ -217,6 +221,8 @@ bool set_channel(void *pDeviceHandler, unsigned int uConnectionChannel)
RFbSetPower(pDevice, RATE_6M, pDevice->byCurrentCh);
VNSvOutPortB(pDevice->PortOffset + MAC_REG_PWROFDM, pDevice->byCurPwr);
MACvSelectPage0(pDevice->PortOffset);
+
+ spin_unlock_irqrestore(&pDevice->lock, flags);
}
if (pDevice->byBBType == BB_TYPE_11B)
diff --git a/drivers/staging/vt6655/device_main.c b/drivers/staging/vt6655/device_main.c
index cd1a277..d5c45f8 100644
--- a/drivers/staging/vt6655/device_main.c
+++ b/drivers/staging/vt6655/device_main.c
@@ -1572,6 +1572,10 @@ static void vnt_configure(struct ieee80211_hw *hw,
if (changed_flags & FIF_ALLMULTI) {
if (*total_flags & FIF_ALLMULTI) {
+ unsigned long flags;
+
+ spin_lock_irqsave(&priv->lock, flags);
+
if (priv->mc_list_count > 2) {
MACvSelectPage1(priv->PortOffset);
@@ -1593,6 +1597,8 @@ static void vnt_configure(struct ieee80211_hw *hw,
MACvSelectPage0(priv->PortOffset);
}
+ spin_unlock_irqrestore(&priv->lock, flags);
+
rx_mode |= RCR_MULTICAST | RCR_BROADCAST;
} else {
rx_mode &= ~(RCR_MULTICAST | RCR_BROADCAST);
--
2.1.0