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bnx2x: Adding FW mailbox mutex

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DCC commands are not protected with the RTNL lock, so a mutex should be added

Signed-off-by: Eilon Greenstein <eilong@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Eilon Greenstein 2009-10-15 00:18:27 -07:00 committed by David S. Miller
parent f34d28ea01
commit c4ff7cbf88
2 changed files with 8 additions and 2 deletions
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3
drivers/net/bnx2x.h
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@ -1023,6 +1023,9 @@ struct bnx2x {
/* used to synchronize dmae accesses */
struct mutex dmae_mutex;
/* used to protect the FW mail box */
struct mutex fw_mb_mutex;
/* used to synchronize stats collecting */
int stats_state;
/* used by dmae command loader */

7
drivers/net/bnx2x_main.c
View File

@ -2528,6 +2528,7 @@ u32 bnx2x_fw_command(struct bnx2x *bp, u32 command)
u32 cnt = 1;
u8 delay = CHIP_REV_IS_SLOW(bp) ? 100 : 10;
mutex_lock(&bp->fw_mb_mutex);
SHMEM_WR(bp, func_mb[func].drv_mb_header, (command | seq));
DP(BNX2X_MSG_MCP, "wrote command (%x) to FW MB\n", (command | seq));
@ -2537,8 +2538,8 @@ u32 bnx2x_fw_command(struct bnx2x *bp, u32 command)
rc = SHMEM_RD(bp, func_mb[func].fw_mb_header);
/* Give the FW up to 2 second (200*10ms) */
} while ((seq != (rc & FW_MSG_SEQ_NUMBER_MASK)) && (cnt++ < 200));
/* Give the FW up to 5 second (500*10ms) */
} while ((seq != (rc & FW_MSG_SEQ_NUMBER_MASK)) && (cnt++ < 500));
DP(BNX2X_MSG_MCP, "[after %d ms] read (%x) seq is (%x) from FW MB\n",
cnt*delay, rc, seq);
@ -2552,6 +2553,7 @@ u32 bnx2x_fw_command(struct bnx2x *bp, u32 command)
bnx2x_fw_dump(bp);
rc = 0;
}
mutex_unlock(&bp->fw_mb_mutex);
return rc;
}
@ -8956,6 +8958,7 @@ static int __devinit bnx2x_init_bp(struct bnx2x *bp)
smp_wmb(); /* Ensure that bp->intr_sem update is SMP-safe */
mutex_init(&bp->port.phy_mutex);
mutex_init(&bp->fw_mb_mutex);
#ifdef BCM_CNIC
mutex_init(&bp->cnic_mutex);
#endif