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authorLendacky, Thomas <Thomas.Lendacky@amd.com>2017-03-09 17:48:23 -0600
committerDavid S. Miller <davem@davemloft.net>2017-03-09 18:31:28 -0800
commitd7aba644ffdebf756e51e26a2229055211838e89 (patch)
tree9ac9dc570d687521034a18d2102157fa34603a1e /drivers/net
parent6fc166d62c6f9f6eda5ea300f671d34e89bdd3c8 (diff)
amd-xgbe: Enable IRQs only if napi_complete_done() is true
Depending on the hardware, the amd-xgbe driver may use disable_irq_nosync() and enable_irq() when an interrupt is received to process Rx packets. If the napi_complete_done() return value isn't checked an unbalanced enable for the IRQ could result, generating a warning stack trace. Update the driver to only enable interrupts if napi_complete_done() returns true. Reported-by: Jeremy Linton <jeremy.linton@arm.com> Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net')
-rw-r--r--drivers/net/ethernet/amd/xgbe/xgbe-drv.c10
1 files changed, 2 insertions, 8 deletions
diff --git a/drivers/net/ethernet/amd/xgbe/xgbe-drv.c b/drivers/net/ethernet/amd/xgbe/xgbe-drv.c
index 248f60d171a5..ffea9859f5a7 100644
--- a/drivers/net/ethernet/amd/xgbe/xgbe-drv.c
+++ b/drivers/net/ethernet/amd/xgbe/xgbe-drv.c
@@ -2272,10 +2272,7 @@ static int xgbe_one_poll(struct napi_struct *napi, int budget)
processed = xgbe_rx_poll(channel, budget);
/* If we processed everything, we are done */
- if (processed < budget) {
- /* Turn off polling */
- napi_complete_done(napi, processed);
-
+ if ((processed < budget) && napi_complete_done(napi, processed)) {
/* Enable Tx and Rx interrupts */
if (pdata->channel_irq_mode)
xgbe_enable_rx_tx_int(pdata, channel);
@@ -2317,10 +2314,7 @@ static int xgbe_all_poll(struct napi_struct *napi, int budget)
} while ((processed < budget) && (processed != last_processed));
/* If we processed everything, we are done */
- if (processed < budget) {
- /* Turn off polling */
- napi_complete_done(napi, processed);
-
+ if ((processed < budget) && napi_complete_done(napi, processed)) {
/* Enable Tx and Rx interrupts */
xgbe_enable_rx_tx_ints(pdata);
}