staging: hv: storvsc: ignore SET_WINDOW scsi command
Some commands sent by smartd will offline the device. With this change applied, smartd sill not monitor the device anymore. Signed-off-by: Olaf Hering <olaf@aepfle.de> Acked-by: K. Y. Srinivasan <kys@microsoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
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@ -1122,6 +1122,22 @@ static void storvsc_command_completion(struct hv_storvsc_request *request)
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kmem_cache_free(host_dev->request_pool, cmd_request);
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}
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static bool storvsc_check_scsi_cmd(struct scsi_cmnd *scmnd)
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{
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bool allowed = true;
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u8 scsi_op = scmnd->cmnd[0];
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switch (scsi_op) {
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/* smartd sends this command, which will offline the device */
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case SET_WINDOW:
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scmnd->result = DID_ERROR << 16;
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allowed = false;
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break;
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default:
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break;
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}
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return allowed;
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}
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/*
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* storvsc_queuecommand - Initiate command processing
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@ -1141,6 +1157,10 @@ static int storvsc_queuecommand_lck(struct scsi_cmnd *scmnd,
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unsigned int sg_count = 0;
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struct vmscsi_request *vm_srb;
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if (storvsc_check_scsi_cmd(scmnd) == false) {
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done(scmnd);
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return 0;
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}
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/* If retrying, no need to prep the cmd */
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if (scmnd->host_scribble) {
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