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MdeModulePkg: Stop the timer before clean IP service. 

In Ip4CleanService()it first cleaned some resources, then stop the timer .
While before the timer stopped it may try to access some already freed
data, which may generate an exception.
This patch updates the driver to stop the timer event before starting to
clean up the service data.

Cc: Wu Jiaxin <jiaxin.wu@intel.com>
Cc: Ye Ting <ting.ye@intel.com>
Cc: Subramanian Sriram <sriram-s@hpe.com>
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Fu Siyuan <siyuan.fu@intel.com>
Reviewed-by: Samer El-Haj-Mahmoud <elhaj@hpe.com>
Reviewed-by: Sriram Subramanian <sriram-s@hpe.com>
Reviewed-by: Ye Ting <ting.ye@intel.com>
Reviewed-by: Wu Jiaxin <jiaxin.wu@intel.com>
This commit is contained in:
Fu, Siyuan 2016-05-26 09:04:06 +08:00 committed by Jiaxin Wu
parent 3ab7066e8d
commit 524813f3ab
1 changed files with 9 additions and 9 deletions
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18
MdeModulePkg/Universal/Network/Ip4Dxe/Ip4Driver.c
View File

@ -393,6 +393,15 @@ Ip4CleanService (
{
EFI_STATUS Status;
IpSb->State = IP4_SERVICE_DESTROY;
if (IpSb->Timer != NULL) {
gBS->SetTimer (IpSb->Timer, TimerCancel, 0);
gBS->CloseEvent (IpSb->Timer);
IpSb->Timer = NULL;
}
if (IpSb->DefaultInterface != NULL) {
Status = Ip4FreeInterface (IpSb->DefaultInterface, NULL);
@ -432,13 +441,6 @@ Ip4CleanService (
IpSb->MnpChildHandle = NULL;
}
if (IpSb->Timer != NULL) {
gBS->SetTimer (IpSb->Timer, TimerCancel, 0);
gBS->CloseEvent (IpSb->Timer);
IpSb->Timer = NULL;
}
if (IpSb->ReconfigEvent != NULL) {
gBS->CloseEvent (IpSb->ReconfigEvent);
@ -750,8 +752,6 @@ Ip4DriverBindingStop (
} else if (IsListEmpty (&IpSb->Children)) {
State = IpSb->State;
IpSb->State = IP4_SERVICE_DESTROY;
//
// OK, clean other resources then uninstall the service binding protocol.
//