From: Aditya Pakki <pakki001@umn.edu>
Date: Mon, 24 Dec 2018 15:21:21 -0600
Subject: net: chelsio: Add a missing check on cudg_get_buffer
Patch-mainline: v5.0-rc1
Git-commit: ca19fcb6285bfce1601c073bf4b9d2942e2df8d9
References: bsc#1136345 jsc#SLE-4681
cudbg_collect_hw_sched() could fail when the function cudg_get_buffer()
returns an error. The fix adds a check to the latter function returning
error on failure
Signed-off-by: Aditya Pakki <pakki001@umn.edu>
Signed-off-by: David S. Miller <davem@davemloft.net>
Acked-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
drivers/net/ethernet/chelsio/cxgb4/cudbg_lib.c | 4 ++++
1 file changed, 4 insertions(+)
--- a/drivers/net/ethernet/chelsio/cxgb4/cudbg_lib.c
+++ b/drivers/net/ethernet/chelsio/cxgb4/cudbg_lib.c
@@ -1229,6 +1229,10 @@ int cudbg_collect_hw_sched(struct cudbg_
rc = cudbg_get_buff(pdbg_init, dbg_buff, sizeof(struct cudbg_hw_sched),
&temp_buff);
+
+ if (rc)
+ return rc;
+
hw_sched_buff = (struct cudbg_hw_sched *)temp_buff.data;
hw_sched_buff->map = t4_read_reg(padap, TP_TX_MOD_QUEUE_REQ_MAP_A);
hw_sched_buff->mode = TIMERMODE_G(t4_read_reg(padap, TP_MOD_CONFIG_A));