[PATCH] soc: ti: reset irq affinity before freeing irq

Murali Karicheri
2015-08-27T15:51:37Z

When using accumulator queue for rx side for network driver, following
warning is seen when doing a reboot command from Linux console. This
is because, affinity value is not reset before calling free_irq(). This
patch fixes this.

Deconfiguring network interfaces...
[ 55.176589] ------------[ cut here ]-----------
[ 55.181232] WARNING: CPU: 0 PID: 2081 at kernel/irq/manage.c:1370
__free_irq+0x208/0x214

Signed-off-by: Murali Karicheri <m-karicheri2@ti.com>
---
- Applies to v4.2.0-rc8

drivers/soc/ti/knav_qmss_acc.c | 4 ++++
1 file changed, 4 insertions(+)

diff --git a/drivers/soc/ti/knav_qmss_acc.c b/drivers/soc/ti/knav_qmss_acc.c
index ef6f69d..b98fe56 100644
--- a/drivers/soc/ti/knav_qmss_acc.c
+++ b/drivers/soc/ti/knav_qmss_acc.c
@@ -261,6 +261,10 @@ static int knav_range_setup_acc_irq(struct knav_range_info *range,
if (old && !new) {
dev_dbg(kdev->dev, "setup-acc-irq: freeing %s for channel %s\n",
acc->name, acc->name);
+ ret = irq_set_affinity_hint(irq, NULL);
+ if (ret)
+ dev_warn(range->kdev->dev,
+ "Failed to set IRQ affinity\n");
free_irq(irq, range);
}

--
1.9.1