[PATCH] iscsi: Fix a sleep-in-atomic bug

[Jia-Ju Bai]

The driver may sleep under a spin lock, and the function call path is:
iscsit_tpg_enable_portal_group (acquire the lock by spin_lock)
  iscsi_update_param_value
    kstrdup(GFP_KERNEL) --> may sleep

To fix it, the "GFP_KERNEL" is replaced with "GFP_ATOMIC".

Signed-off-by: Jia-Ju Bai <baijiaju1990@xxxxxxx>
---
 drivers/target/iscsi/iscsi_target_parameters.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/target/iscsi/iscsi_target_parameters.c b/drivers/target/iscsi/iscsi_target_parameters.c
index fce6276..8768916 100644
--- a/drivers/target/iscsi/iscsi_target_parameters.c
+++ b/drivers/target/iscsi/iscsi_target_parameters.c
@@ -702,7 +702,7 @@ int iscsi_update_param_value(struct iscsi_param *param, char *value)
 {
 	kfree(param->value);
 
-	param->value = kstrdup(value, GFP_KERNEL);
+	param->value = kstrdup(value, GFP_ATOMIC);
 	if (!param->value) {
 		pr_err("Unable to allocate memory for value.\n");
 		return -ENOMEM;
-- 
1.7.9.5