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Date: Wed, 8 Nov 2017 15:17:07 +0100
From: Steffen Maier <maier@...ux.vnet.ibm.com>
To: "James E . J . Bottomley" <jejb@...ux.vnet.ibm.com>,
"Martin K . Petersen" <martin.petersen@...cle.com>,
Kees Cook <keescook@...omium.org>
Cc: linux-scsi@...r.kernel.org, linux-s390@...r.kernel.org,
linux-kernel@...r.kernel.org,
Martin Schwidefsky <schwidefsky@...ibm.com>,
Heiko Carstens <heiko.carstens@...ibm.com>,
Steffen Maier <maier@...ux.vnet.ibm.com>,
Benjamin Block <bblock@...ux.vnet.ibm.com>
Subject: [PATCH 1/3] zfcp: convert timers to use timer_setup()
From: Kees Cook <keescook@...omium.org>
In preparation for unconditionally passing the struct timer_list pointer to
all timer callbacks, switch to using the new timer_setup() and from_timer()
to pass the timer pointer explicitly.
Cc: Steffen Maier <maier@...ux.vnet.ibm.com>
Cc: Benjamin Block <bblock@...ux.vnet.ibm.com>
Cc: Martin Schwidefsky <schwidefsky@...ibm.com>
Cc: Heiko Carstens <heiko.carstens@...ibm.com>
Cc: linux-s390@...r.kernel.org
Signed-off-by: Kees Cook <keescook@...omium.org>
Signed-off-by: Martin Schwidefsky <schwidefsky@...ibm.com>
[maier@...ux.vnet.ibm.com:
depends on v4.14-rc3 686fef928bba ("timer: Prepare to change timer callback argument type"),
rebased onto v4.14-rc7 ab31fd0ce65e ("scsi: zfcp: fix erp_action use-before-initialize in REC action trace")]
Signed-off-by: Steffen Maier <maier@...ux.vnet.ibm.com>
Reviewed-by: Jens Remus <jremus@...ux.vnet.ibm.com>
---
drivers/s390/scsi/zfcp_erp.c | 16 ++++++++++------
drivers/s390/scsi/zfcp_ext.h | 2 +-
drivers/s390/scsi/zfcp_fsf.c | 13 ++++++-------
3 files changed, 17 insertions(+), 14 deletions(-)
diff --git a/drivers/s390/scsi/zfcp_erp.c b/drivers/s390/scsi/zfcp_erp.c
index cbb8156bf5e0..822a852d578e 100644
--- a/drivers/s390/scsi/zfcp_erp.c
+++ b/drivers/s390/scsi/zfcp_erp.c
@@ -56,6 +56,8 @@ enum zfcp_erp_act_result {
ZFCP_ERP_NOMEM = 5,
};
+static void zfcp_erp_memwait_handler(struct timer_list *t);
+
static void zfcp_erp_adapter_block(struct zfcp_adapter *adapter, int mask)
{
zfcp_erp_clear_adapter_status(adapter,
@@ -237,6 +239,7 @@ static struct zfcp_erp_action *zfcp_erp_setup_act(int need, u32 act_status,
erp_action->fsf_req_id = 0;
erp_action->action = need;
erp_action->status = act_status;
+ timer_setup(&erp_action->timer, zfcp_erp_memwait_handler, 0);
return erp_action;
}
@@ -564,21 +567,22 @@ void zfcp_erp_notify(struct zfcp_erp_action *erp_action, unsigned long set_mask)
* zfcp_erp_timeout_handler - Trigger ERP action from timed out ERP request
* @data: ERP action (from timer data)
*/
-void zfcp_erp_timeout_handler(unsigned long data)
+void zfcp_erp_timeout_handler(struct timer_list *t)
{
- struct zfcp_erp_action *act = (struct zfcp_erp_action *) data;
+ struct zfcp_fsf_req *fsf_req = from_timer(fsf_req, t, timer);
+ struct zfcp_erp_action *act = fsf_req->erp_action;
zfcp_erp_notify(act, ZFCP_STATUS_ERP_TIMEDOUT);
}
-static void zfcp_erp_memwait_handler(unsigned long data)
+static void zfcp_erp_memwait_handler(struct timer_list *t)
{
- zfcp_erp_notify((struct zfcp_erp_action *)data, 0);
+ struct zfcp_erp_action *act = from_timer(act, t, timer);
+
+ zfcp_erp_notify(act, 0);
}
static void zfcp_erp_strategy_memwait(struct zfcp_erp_action *erp_action)
{
- setup_timer(&erp_action->timer, zfcp_erp_memwait_handler,
- (unsigned long) erp_action);
erp_action->timer.expires = jiffies + HZ;
add_timer(&erp_action->timer);
}
diff --git a/drivers/s390/scsi/zfcp_ext.h b/drivers/s390/scsi/zfcp_ext.h
index 8ca2ab7deaa9..978a0d596f68 100644
--- a/drivers/s390/scsi/zfcp_ext.h
+++ b/drivers/s390/scsi/zfcp_ext.h
@@ -69,7 +69,7 @@ extern int zfcp_erp_thread_setup(struct zfcp_adapter *);
extern void zfcp_erp_thread_kill(struct zfcp_adapter *);
extern void zfcp_erp_wait(struct zfcp_adapter *);
extern void zfcp_erp_notify(struct zfcp_erp_action *, unsigned long);
-extern void zfcp_erp_timeout_handler(unsigned long);
+extern void zfcp_erp_timeout_handler(struct timer_list *);
/* zfcp_fc.c */
extern struct kmem_cache *zfcp_fc_req_cache;
diff --git a/drivers/s390/scsi/zfcp_fsf.c b/drivers/s390/scsi/zfcp_fsf.c
index 00fb98f7b2cd..6f437df1995f 100644
--- a/drivers/s390/scsi/zfcp_fsf.c
+++ b/drivers/s390/scsi/zfcp_fsf.c
@@ -21,9 +21,10 @@
struct kmem_cache *zfcp_fsf_qtcb_cache;
-static void zfcp_fsf_request_timeout_handler(unsigned long data)
+static void zfcp_fsf_request_timeout_handler(struct timer_list *t)
{
- struct zfcp_adapter *adapter = (struct zfcp_adapter *) data;
+ struct zfcp_fsf_req *fsf_req = from_timer(fsf_req, t, timer);
+ struct zfcp_adapter *adapter = fsf_req->adapter;
zfcp_qdio_siosl(adapter);
zfcp_erp_adapter_reopen(adapter, ZFCP_STATUS_COMMON_ERP_FAILED,
"fsrth_1");
@@ -32,8 +33,7 @@ static void zfcp_fsf_request_timeout_handler(unsigned long data)
static void zfcp_fsf_start_timer(struct zfcp_fsf_req *fsf_req,
unsigned long timeout)
{
- fsf_req->timer.function = zfcp_fsf_request_timeout_handler;
- fsf_req->timer.data = (unsigned long) fsf_req->adapter;
+ fsf_req->timer.function = (TIMER_FUNC_TYPE)zfcp_fsf_request_timeout_handler;
fsf_req->timer.expires = jiffies + timeout;
add_timer(&fsf_req->timer);
}
@@ -41,8 +41,7 @@ static void zfcp_fsf_start_timer(struct zfcp_fsf_req *fsf_req,
static void zfcp_fsf_start_erp_timer(struct zfcp_fsf_req *fsf_req)
{
BUG_ON(!fsf_req->erp_action);
- fsf_req->timer.function = zfcp_erp_timeout_handler;
- fsf_req->timer.data = (unsigned long) fsf_req->erp_action;
+ fsf_req->timer.function = (TIMER_FUNC_TYPE)zfcp_erp_timeout_handler;
fsf_req->timer.expires = jiffies + 30 * HZ;
add_timer(&fsf_req->timer);
}
@@ -692,7 +691,7 @@ static struct zfcp_fsf_req *zfcp_fsf_req_create(struct zfcp_qdio *qdio,
adapter->req_no++;
INIT_LIST_HEAD(&req->list);
- init_timer(&req->timer);
+ timer_setup(&req->timer, NULL, 0);
init_completion(&req->completion);
req->adapter = adapter;
--
2.13.5
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