igb: fix a few items where weren't correctly setup for mbx timeout

The mailbox timeout routines need to be updated as they were not correctly
handling the case of a mailbox timeout and could cause issues with long
delays when used.

Signed-off-by: Alexander Duyck <alexander.h.duyck@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 14 insertions, 5 deletions

diff --git a/drivers/net/igb/e1000_mbx.c b/drivers/net/igb/e1000_mbx.c
index ef645f604d89..c474cdb70047 100644
--- a/drivers/net/igb/e1000_mbx.c
+++ b/drivers/net/igb/e1000_mbx.c
@@ -143,12 +143,16 @@ static s32 igb_poll_for_msg(struct e1000_hw *hw, u16 mbx_id)
         if (!countdown || !mbx->ops.check_for_msg)
                 goto out;
 
-        while (mbx->ops.check_for_msg(hw, mbx_id)) {
+        while (countdown && mbx->ops.check_for_msg(hw, mbx_id)) {
                 countdown--;
                 if (!countdown)
                         break;
                 udelay(mbx->usec_delay);
         }
+
+        /* if we failed, all future posted messages fail until reset */
+        if (!countdown)
+                mbx->timeout = 0;
 out:
         return countdown ? 0 : -E1000_ERR_MBX;
 }
@@ -168,12 +172,16 @@ static s32 igb_poll_for_ack(struct e1000_hw *hw, u16 mbx_id)
         if (!countdown || !mbx->ops.check_for_ack)
                 goto out;
 
-        while (mbx->ops.check_for_ack(hw, mbx_id)) {
+        while (countdown && mbx->ops.check_for_ack(hw, mbx_id)) {
                 countdown--;
                 if (!countdown)
                         break;
                 udelay(mbx->usec_delay);
         }
+
+        /* if we failed, all future posted messages fail until reset */
+        if (!countdown)
+                mbx->timeout = 0;
 out:
         return countdown ? 0 : -E1000_ERR_MBX;
 }
@@ -217,12 +225,13 @@ out:
 static s32 igb_write_posted_mbx(struct e1000_hw *hw, u32 *msg, u16 size, u16 mbx_id)
 {
         struct e1000_mbx_info *mbx = &hw->mbx;
-        s32 ret_val = 0;
+        s32 ret_val = -E1000_ERR_MBX;
 
-        if (!mbx->ops.write)
+        /* exit if either we can't write or there isn't a defined timeout */
+        if (!mbx->ops.write || !mbx->timeout)
                 goto out;
 
-        /* send msg*/
+        /* send msg */
         ret_val = mbx->ops.write(hw, msg, size, mbx_id);
 
         /* if msg sent wait until we receive an ack */