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authorJoe Lawrence <joe.lawrence@stratus.com>2014-06-26 01:06:42 +0400
committerChristoph Hellwig <hch@lst.de>2014-07-26 01:16:58 +0400
commit32696198745a74b37bc27498a5ade169d2c04c5e (patch)
tree6b86964c219585ccd11131dc3523b78eff309299 /drivers
parentc9834c70efbaaa1461ec04289d97a842244fb294 (diff)
downloadlinux-32696198745a74b37bc27498a5ade169d2c04c5e.tar.xz
mptfusion: combine fw_event_work and its event_data
Tack the firmware reply event_data payload to the end of its corresponding struct fw_event_work allocation. Rework fw_event_work allocation calculations to include the event_data size where appropriate. This clarifies the code a bit and avoids the following smatch warnings: drivers/message/fusion/mptsas.c:1003 mptsas_queue_device_delete() error: memcpy() 'fw_event->event_data' too small (29 vs 36) drivers/message/fusion/mptsas.c:1017 mptsas_queue_rescan() error: not allocating enough data 168 vs 160 Signed-off-by: Joe Lawrence <joe.lawrence@stratus.com> Acked-by: Sreekanth Reddy <Sreekanth.Reddy@avagotech.com> Signed-off-by: Christoph Hellwig <hch@lst.de>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/message/fusion/mptsas.c16
-rw-r--r--drivers/message/fusion/mptsas.h2
2 files changed, 7 insertions, 11 deletions
diff --git a/drivers/message/fusion/mptsas.c b/drivers/message/fusion/mptsas.c
index a0d4218103db..b0b74c4d2645 100644
--- a/drivers/message/fusion/mptsas.c
+++ b/drivers/message/fusion/mptsas.c
@@ -990,11 +990,10 @@ mptsas_queue_device_delete(MPT_ADAPTER *ioc,
MpiEventDataSasDeviceStatusChange_t *sas_event_data)
{
struct fw_event_work *fw_event;
- int sz;
- sz = offsetof(struct fw_event_work, event_data) +
- sizeof(MpiEventDataSasDeviceStatusChange_t);
- fw_event = kzalloc(sz, GFP_ATOMIC);
+ fw_event = kzalloc(sizeof(*fw_event) +
+ sizeof(MpiEventDataSasDeviceStatusChange_t),
+ GFP_ATOMIC);
if (!fw_event) {
printk(MYIOC_s_WARN_FMT "%s: failed at (line=%d)\n",
ioc->name, __func__, __LINE__);
@@ -1011,10 +1010,8 @@ static void
mptsas_queue_rescan(MPT_ADAPTER *ioc)
{
struct fw_event_work *fw_event;
- int sz;
- sz = offsetof(struct fw_event_work, event_data);
- fw_event = kzalloc(sz, GFP_ATOMIC);
+ fw_event = kzalloc(sizeof(*fw_event), GFP_ATOMIC);
if (!fw_event) {
printk(MYIOC_s_WARN_FMT "%s: failed at (line=%d)\n",
ioc->name, __func__, __LINE__);
@@ -4983,7 +4980,7 @@ static int
mptsas_event_process(MPT_ADAPTER *ioc, EventNotificationReply_t *reply)
{
u32 event = le32_to_cpu(reply->Event);
- int sz, event_data_sz;
+ int event_data_sz;
struct fw_event_work *fw_event;
unsigned long delay;
@@ -5093,8 +5090,7 @@ mptsas_event_process(MPT_ADAPTER *ioc, EventNotificationReply_t *reply)
event_data_sz = ((reply->MsgLength * 4) -
offsetof(EventNotificationReply_t, Data));
- sz = offsetof(struct fw_event_work, event_data) + event_data_sz;
- fw_event = kzalloc(sz, GFP_ATOMIC);
+ fw_event = kzalloc(sizeof(*fw_event) + event_data_sz, GFP_ATOMIC);
if (!fw_event) {
printk(MYIOC_s_WARN_FMT "%s: failed at (line=%d)\n", ioc->name,
__func__, __LINE__);
diff --git a/drivers/message/fusion/mptsas.h b/drivers/message/fusion/mptsas.h
index 57e86ab77661..c396483d3624 100644
--- a/drivers/message/fusion/mptsas.h
+++ b/drivers/message/fusion/mptsas.h
@@ -110,7 +110,7 @@ struct fw_event_work {
MPT_ADAPTER *ioc;
u32 event;
u8 retries;
- u8 __attribute__((aligned(4))) event_data[1];
+ char event_data[0] __aligned(4);
};
struct mptsas_discovery_event {