When the driver cannot map a TX buffer, instead of rolling back
gracefully and retrying later, we currently get a panic:
[ 159.885994] igb 0000:00:00.0: TX DMA map failed
[ 159.886588] Unable to handle kernel paging request at virtual address
ffff00000a08c7a8
...
[ 159.897031] PC is at igb_xmit_frame_ring+0x9c8/0xcb8
Fix the erroneous test that leads to this situation.
Signed-off-by: Jean-Philippe Brucker <jean-philippe.bruc...@arm.com>
---
drivers/net/ethernet/intel/igb/igb_main.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/net/ethernet/intel/igb/igb_main.c
b/drivers/net/ethernet/intel/igb/igb_main.c
index fd4a46b03cc8..ea69af267d63 100644
--- a/drivers/net/ethernet/intel/igb/igb_main.c
+++ b/drivers/net/ethernet/intel/igb/igb_main.c
@@ -5326,7 +5326,7 @@ static int igb_tx_map(struct igb_ring *tx_ring,
DMA_TO_DEVICE);
dma_unmap_len_set(tx_buffer, len, 0);
- if (i--)
+ if (i-- == 0)
i += tx_ring->count;
tx_buffer = &tx_ring->tx_buffer_info[i];
}
--
2.13.3
