On 08/27/2015 12:43 PM, Nathan Lynch wrote:
On 08/27/2015 10:51 AM, Murali Karicheri wrote:
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
The full content of the warning should be included in the commit
message; __free_irq has several potential sources of warning messages,
and line 1370 doesn't correspond to any of them in 4.2-rc8.
The log corresponds to 4.1.x kernel. Corresponding WARN_ONCE is
#ifdef CONFIG_SMP
/* make sure affinity_hint is cleaned up */
if (WARN_ON_ONCE(desc->affinity_hint))
desc->affinity_hint = NULL;
#endif
Which is line 1922. I can edit to make it 1922. Does that work?
Murali
Signed-off-by: Murali Karicheri <m-kariche...@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");
Seems unnecessary to add a warning here.
--
Murali Karicheri
Linux Kernel, Keystone
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