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net: chelsio: Add a missing check on cudg_get_buffer 

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>
This commit is contained in:
Aditya Pakki 2018-12-24 15:21:21 -06:00 committed by David S. Miller
parent f0fb9b288d
commit ca19fcb628
1 changed files with 4 additions and 0 deletions
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4
drivers/net/ethernet/chelsio/cxgb4/cudbg_lib.c
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@ -1229,6 +1229,10 @@ int cudbg_collect_hw_sched(struct cudbg_init *pdbg_init,
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));