[PATCH 4.14 040/189] net: hns: Avoid action name truncation

[Greg Kroah-Hartman]

4.14-stable review patch.  If anyone has any objections, please let me know.

------------------

From: dann frazier <dann.frazier@xxxxxxxxxxxxx>

[ Upstream commit f4ea89110df237da6fbcaab76af431e85f07d904 ]

When longer interface names are used, the action names exposed in
/proc/interrupts and /proc/irq/* maybe truncated. For example, when
using the predictable name algorithm in systemd on a HiSilicon D05,
I see:

  ubuntu@d05-3:~$  grep enahisic2i0-tx /proc/interrupts | sed 's/.* //'
  enahisic2i0-tx0
  enahisic2i0-tx1
  [...]
  enahisic2i0-tx8
  enahisic2i0-tx9
  enahisic2i0-tx1
  enahisic2i0-tx1
  enahisic2i0-tx1
  enahisic2i0-tx1
  enahisic2i0-tx1
  enahisic2i0-tx1

Increase the max ring name length to allow for an interface name
of IFNAMSIZE. After this change, I now see:

  $ grep enahisic2i0-tx /proc/interrupts | sed 's/.* //'
  enahisic2i0-tx0
  enahisic2i0-tx1
  enahisic2i0-tx2
  [...]
  enahisic2i0-tx8
  enahisic2i0-tx9
  enahisic2i0-tx10
  enahisic2i0-tx11
  enahisic2i0-tx12
  enahisic2i0-tx13
  enahisic2i0-tx14
  enahisic2i0-tx15

Signed-off-by: dann frazier <dann.frazier@xxxxxxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <alexander.levin@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
 drivers/net/ethernet/hisilicon/hns/hnae.h |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/net/ethernet/hisilicon/hns/hnae.h
+++ b/drivers/net/ethernet/hisilicon/hns/hnae.h
@@ -87,7 +87,7 @@ do { \
 
 #define HNAE_AE_REGISTER 0x1
 
-#define RCB_RING_NAME_LEN 16
+#define RCB_RING_NAME_LEN (IFNAMSIZ + 4)
 
 #define HNAE_LOWEST_LATENCY_COAL_PARAM	30
 #define HNAE_LOW_LATENCY_COAL_PARAM	80