Re: DisconnectController API not working.

[Amit kumar <akamit91@hotmail.com>]

Hi Andrew ,

I did some testing and found out, same code works fine on Server boards but it fails on desktop boards.

I Have double checked the ControllerHandle by printing its handle index using ConvertHandleToHandleIndex(ControllerHandle), the  ControllerHandle looks correct.


I have one new query;

i have made a startup.nsh file in which i am issuing load driver.efi , i am getting file not found.

i have also tried using load fs0:driver.efi, and again i get  file not found.  I have been trying to run this script from internal shell as well as usb shell.


Regards

Amit Kumar

________________________________
From: afish@apple.com <afish@apple.com> on behalf of Andrew Fish <afish@apple.com>
Sent: Friday, March 31, 2017 10:42:08 PM
To: Amit kumar
Cc: edk2-devel@lists.01.org
Subject: Re: [edk2] DisconnectController API not working.


On Mar 31, 2017, at 5:26 AM, Amit kumar <akamit91@hotmail.com<mailto:akamit91@hotmail.com>> wrote:


Hi ,

I am trying to disconnect a controller from the usb mass storage driver, for which i am using

   Status = gBS->DisconnectController (
     ControllerHandle,
     NULL,
     NULL
     );

after the call i get Status = SUCCESS , but when i run drivers command in shell, i find it still being manged by the same old driver handle.
Although when i run disconnect command from shell (e.g disconnect 163 ...output disconnect(163,0,0):Status = SUCCESS)
it works as expected and detaches the controller from the driver.
Can some body point me out what could be the reason.

Amit,

It is always good to double check you are using the right ControllerHandle.

Sequence of events matters. There are boot flows and Shell commands that do ConnectController.
~/work/src/edk2/ShellPkg(master)>git grep ConnectController
Library/UefiShellDebug1CommandsLib/LoadPciRom.c:402:    gBS->ConnectController (HandleBuffer[Index], NULL, NULL, TRUE);
Library/UefiShellDriver1CommandsLib/Connect.c:54:        Status = gBS->ConnectController (Handle, NULL, RemainingDevicePath, FALSE);
Library/UefiShellDriver1CommandsLib/Connect.c:95:    gBS->ConnectController (RootBridgeHandleBuffer[RootBridgeIndex], NULL, NULL, FALSE);
Library/UefiShellDriver1CommandsLib/Connect.c:116:ConnectControllers (
Library/UefiShellDriver1CommandsLib/Connect.c:150:  // This is where we call the gBS->ConnectController function.
Library/UefiShellDriver1CommandsLib/Connect.c:158:      Status = gBS->ConnectController(*HandleWalker, DriverHandleList, NULL, Recursive);
Library/UefiShellDriver1CommandsLib/Connect.c:167:    Status = gBS->ConnectController(ControllerHandle, DriverHandleList, NULL, Recursive);
Library/UefiShellDriver1CommandsLib/Connect.c:298:                Status = gBS->ConnectController (
Library/UefiShellDriver1CommandsLib/Connect.c:354:ConvertAndConnectControllers (
Library/UefiShellDriver1CommandsLib/Connect.c:391:  return (ConnectControllers(Handle1, Handle2, Recursive, Output, (BOOLEAN)(Handle2 != NULL && Handle1 != NULL)));
Library/UefiShellDriver1CommandsLib/Connect.c:536:          Status = ConvertAndConnectControllers(Handle1, Handle2, ShellCommandLineGetFlag(Package, L"-r"), (BOOLEAN)(Count!=0));
Library/UefiShellDriver1CommandsLib/DrvCfg.c:492:  EFI_HANDLE  ConnectControllerContextOverride[2];
Library/UefiShellDriver1CommandsLib/DrvCfg.c:514:    ConnectControllerContextOverride[0]  = DriverImageHandle;
Library/UefiShellDriver1CommandsLib/DrvCfg.c:515:    ConnectControllerContextOverride[1]  = NULL;
Library/UefiShellDriver1CommandsLib/DrvCfg.c:516:    gBS->ConnectController (ControllerHandle, ConnectControllerContextOverride, NULL, TRUE);
Library/UefiShellLevel2CommandsLib/Load.c:52:    Status = gBS->ConnectController (HandleBuffer[Index], NULL, NULL, TRUE);


Thanks,

Andrew Fish

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