Dell - Internal Use - Confidential Hi Michael, My intention is to write some data in Disk using UEFI application. To achieve this how I have to modify my code ? Regards Parmeshwr
From: Kinney, Michael D [mailto:michael.d.kin...@intel.com] Sent: Thursday, October 17, 2013 9:48 PM To: edk2-devel@lists.sourceforge.net Subject: Re: [edk2] problem in openprotocol Parmeshwr, Likely because a different driver has already opened that specific Disk I/O protocol instance. The BY_DRIVER open mode is a request to open the protocol and then prevent other drivers from opening the same protocol. If you use the openinfo shell command on the handle that contains the Disk I/O protocol, you will see which drivers have already opened that protocol. Are you working on an app that need temporary exclusive access to that protocol, or a driver that will eventually be part of the platform firmware? Thanks, Mike From: parmeshwr_pra...@dell.com<mailto:parmeshwr_pra...@dell.com> [mailto:parmeshwr_pra...@dell.com] Sent: Thursday, October 17, 2013 5:55 AM To: edk2-devel@lists.sourceforge.net<mailto:edk2-devel@lists.sourceforge.net> Subject: [edk2] problem in openprotocol Hi all, I am working on some project where I need to open Disk protocol. Below is my code- Status = gBS->OpenProtocol(ControllerHandle ,&gEfiDiskIoProtocolGuid,(VOID **) &DiskIo, gImageHandle, NULL, EFI_OPEN_PROTOCOL_BY_DRIVER); if (EFI_ERROR(Status)) { Print(L"Disk IO error %d\n",Status); return Status; } Why this code always goes to error condition. If I use EFI_OPEN_PROTOCOL_GET_PROTOCOL as parameter it will not go to error condition, how to get rid of this problem ? Best Regards, Parmeshwr Prasad [cid:image001.png@01CECBE9.17357180]
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