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Ip=[192.88.168.50]; Helo=[tx30smr01.am.freescale.net] X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: SN2PR03MB2367 Subject: (No subject) X-BeenThere: edk2-devel@lists.01.org X-Mailman-Version: 2.1.22 Precedence: list List-Id: EDK II Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 18 Sep 2017 07:37:35 -0000 Content-Type: text/plain Hi Laszlo, Zeng Thanks for patch review. @Zeng: The sermode command calls SerialSetAttributes, which sets H/W attributes of Serial device. After that the SerialIo protocol is reinstalled, which causes MdeModulePkg/Universal/Console/TerminalDxe and MdeModulePkg/Universal/Console/ConPlatformDxe drivers' bindings to stop and then start. This in turn calls SerialReset, which undoes changes of SerialSetAttributes.