cxgb3 - log and clear PEX errors

Clear pciE PEX errors late at module load time.
Log details when PEX errors occur.

Signed-off-by: Divy Le Ray <divy@chelsio.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>

1 files changed, 6 insertions, 0 deletions

diff --git a/drivers/net/cxgb3/t3_hw.c b/drivers/net/cxgb3/t3_hw.c
index 2b49b96a6fdb..cdcfc132e37d 100644
--- a/drivers/net/cxgb3/t3_hw.c
+++ b/drivers/net/cxgb3/t3_hw.c
@@ -1358,6 +1358,10 @@ static void pcie_intr_handler(struct adapter *adapter)
                 {0}
         };
 
+        if (t3_read_reg(adapter, A_PCIE_INT_CAUSE) & F_PEXERR)
+                CH_ALERT(adapter, "PEX error code 0x%x\n",
+                         t3_read_reg(adapter, A_PCIE_PEX_ERR));
+
         if (t3_handle_intr_status(adapter, A_PCIE_INT_CAUSE, PCIE_INTR_MASK,
                                   pcie_intr_info, adapter->irq_stats))
                 t3_fatal_err(adapter);
@@ -1809,6 +1813,8 @@ void t3_intr_clear(struct adapter *adapter)
         for (i = 0; i < ARRAY_SIZE(cause_reg_addr); ++i)
                 t3_write_reg(adapter, cause_reg_addr[i], 0xffffffff);
 
+        if (is_pcie(adapter))
+                t3_write_reg(adapter, A_PCIE_PEX_ERR, 0xffffffff);
         t3_write_reg(adapter, A_PL_INT_CAUSE0, 0xffffffff);
         t3_read_reg(adapter, A_PL_INT_CAUSE0);  /* flush */
 }