Upgrade to 4.4.50-rt62

[kvmfornfv.git] / kernel / drivers / net / ethernet / intel / fm10k / fm10k_vf.c

diff --git a/kernel/drivers/net/ethernet/intel/fm10k/fm10k_vf.c b/kernel/drivers/net/ethernet/intel/fm10k/fm10k_vf.c
index 36c8b0a..d512575 100644 (file)
--- a/kernel/drivers/net/ethernet/intel/fm10k/fm10k_vf.c
+++ b/kernel/drivers/net/ethernet/intel/fm10k/fm10k_vf.c
@@ -103,7 +103,14 @@ static s32 fm10k_init_hw_vf(struct fm10k_hw *hw)
        s32 err;
        u16 i;
 
-       /* assume we always have at least 1 queue */
+       /* verify we have at least 1 queue */
+       if (!~fm10k_read_reg(hw, FM10K_TXQCTL(0)) ||
+           !~fm10k_read_reg(hw, FM10K_RXQCTL(0))) {
+               err = FM10K_ERR_NO_RESOURCES;
+               goto reset_max_queues;
+       }
+
+       /* determine how many queues we have */
        for (i = 1; tqdloc0 && (i < FM10K_MAX_QUEUES_POOL); i++) {
                /* verify the Descriptor cache offsets are increasing */
                tqdloc = ~fm10k_read_reg(hw, FM10K_TQDLOC(i));
@@ -119,7 +126,7 @@ static s32 fm10k_init_hw_vf(struct fm10k_hw *hw)
        /* shut down queues we own and reset DMA configuration */
        err = fm10k_disable_queues_generic(hw, i);
        if (err)
-               return err;
+               goto reset_max_queues;
 
        /* record maximum queue count */
        hw->mac.max_queues = i;
@@ -129,6 +136,11 @@ static s32 fm10k_init_hw_vf(struct fm10k_hw *hw)
                               FM10K_TXQCTL_VID_MASK) >> FM10K_TXQCTL_VID_SHIFT;
 
        return 0;
+
+reset_max_queues:
+       hw->mac.max_queues = 0;
+
+       return err;
 }
 
 /* This structure defines the attibutes to be parsed below */