Deadlock might be caused by allocating memory with GFP_KERNEL in runtime_resume callback of network devices in iSCSI situation, so mark network devices and its ancestor as 'memalloc_noio_resume' with the introduced pm_runtime_set_memalloc_noio().
Cc: "David S. Miller" <[email protected]> Cc: Eric Dumazet <[email protected]> Cc: David Decotigny <[email protected]> Cc: Tom Herbert <[email protected]> Cc: Ingo Molnar <[email protected]> Signed-off-by: Ming Lei <[email protected]> --- net/core/net-sysfs.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/net/core/net-sysfs.c b/net/core/net-sysfs.c index bcf02f6..9aba5be 100644 --- a/net/core/net-sysfs.c +++ b/net/core/net-sysfs.c @@ -22,6 +22,7 @@ #include <linux/vmalloc.h> #include <linux/export.h> #include <linux/jiffies.h> +#include <linux/pm_runtime.h> #include <net/wext.h> #include "net-sysfs.h" @@ -1386,6 +1387,8 @@ void netdev_unregister_kobject(struct net_device * net) remove_queue_kobjects(net); + pm_runtime_set_memalloc_noio(dev, false); + device_del(dev); } @@ -1411,6 +1414,8 @@ int netdev_register_kobject(struct net_device *net) *groups++ = &netstat_group; #endif /* CONFIG_SYSFS */ + pm_runtime_set_memalloc_noio(dev, true); + error = device_add(dev); if (error) return error; -- 1.7.9.5 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
