[PATCH 16/20][BNX2]: Add indirect spinlock.

[Michael Chan]

[BNX2]: Add indirect spinlock.

The indirect register access method will be used by more than one
caller in BH context (NAPI poll and timer), so a spinlock is required.

Signed-off-by: Michael Chan <[EMAIL PROTECTED]>

diff --git a/drivers/net/bnx2.c b/drivers/net/bnx2.c
index ffd6976..34ae3e9 100644
--- a/drivers/net/bnx2.c
+++ b/drivers/net/bnx2.c
@@ -234,21 +234,29 @@ static inline u32 bnx2_tx_avail(struct bnx2 *bp)
 static u32
 bnx2_reg_rd_ind(struct bnx2 *bp, u32 offset)
 {
+       u32 val;
+
+       spin_lock_bh(&bp->indirect_lock);
        REG_WR(bp, BNX2_PCICFG_REG_WINDOW_ADDRESS, offset);
-       return (REG_RD(bp, BNX2_PCICFG_REG_WINDOW));
+       val = REG_RD(bp, BNX2_PCICFG_REG_WINDOW);
+       spin_unlock_bh(&bp->indirect_lock);
+       return val;
 }
 
 static void
 bnx2_reg_wr_ind(struct bnx2 *bp, u32 offset, u32 val)
 {
+       spin_lock_bh(&bp->indirect_lock);
        REG_WR(bp, BNX2_PCICFG_REG_WINDOW_ADDRESS, offset);
        REG_WR(bp, BNX2_PCICFG_REG_WINDOW, val);
+       spin_unlock_bh(&bp->indirect_lock);
 }
 
 static void
 bnx2_ctx_wr(struct bnx2 *bp, u32 cid_addr, u32 offset, u32 val)
 {
        offset += cid_addr;
+       spin_lock_bh(&bp->indirect_lock);
        if (CHIP_NUM(bp) == CHIP_NUM_5709) {
                int i;
 
@@ -266,6 +274,7 @@ bnx2_ctx_wr(struct bnx2 *bp, u32 cid_addr, u32 offset, u32 
val)
                REG_WR(bp, BNX2_CTX_DATA_ADR, offset);
                REG_WR(bp, BNX2_CTX_DATA, val);
        }
+       spin_unlock_bh(&bp->indirect_lock);
 }
 
 static int
@@ -6138,6 +6147,7 @@ bnx2_init_board(struct pci_dev *pdev, struct net_device 
*dev)
        bp->pdev = pdev;
 
        spin_lock_init(&bp->phy_lock);
+       spin_lock_init(&bp->indirect_lock);
        INIT_WORK(&bp->reset_task, bnx2_reset_task);
 
        dev->base_addr = dev->mem_start = pci_resource_start(pdev, 0);
diff --git a/drivers/net/bnx2.h b/drivers/net/bnx2.h
index 124bd03..ba175a8 100644
--- a/drivers/net/bnx2.h
+++ b/drivers/net/bnx2.h
@@ -6522,6 +6522,7 @@ struct bnx2 {
 
        /* Used to synchronize phy accesses. */
        spinlock_t              phy_lock;
+       spinlock_t              indirect_lock;
 
        u32                     phy_flags;
 #define PHY_SERDES_FLAG                        1


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