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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>
This commit is contained in:
Joe Lawrence 2014-06-25 17:06:42 -04:00 committed by Christoph Hellwig
parent c9834c70ef
commit 3269619874
2 changed files with 7 additions and 11 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

16
drivers/message/fusion/mptsas.c
View File

@ -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__);

2
drivers/message/fusion/mptsas.h
View File

@ -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 {