[PATCH 4.9 094/130] bnxt_en: Always set output parameters in bnxt_get_max_rings().

From: Greg Kroah-Hartman
Date: Thu Aug 23 2018 - 05:12:37 EST

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


From: Michael Chan <michael.chan@xxxxxxxxxxxx>

[ Upstream commit 78f058a4aa0f2280dc4d45d2c4a95728398ef857 ]

The current code returns -ENOMEM and does not bother to set the output
parameters to 0 when no rings are available. Some callers, such as
bnxt_get_channels() will display garbage ring numbers when that happens.
Fix it by always setting the output parameters.

Fixes: 6e6c5a57fbe1 ("bnxt_en: Modify bnxt_get_max_rings() to support shared or non shared rings.")
Signed-off-by: Michael Chan <michael.chan@xxxxxxxxxxxx>
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/broadcom/bnxt/bnxt.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)

--- a/drivers/net/ethernet/broadcom/bnxt/bnxt.c
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
@@ -6862,11 +6862,11 @@ int bnxt_get_max_rings(struct bnxt *bp,
int rx, tx, cp;

_bnxt_get_max_rings(bp, &rx, &tx, &cp);
+ *max_rx = rx;
+ *max_tx = tx;
if (!rx || !tx || !cp)
return -ENOMEM;

- *max_rx = rx;
- *max_tx = tx;
return bnxt_trim_rings(bp, max_rx, max_tx, cp, shared);