releases/3.1.1/staging-hv-add-support-for-2-tb-lun-in-storage-driver.patch

   1 From cf55f4a8b6243b42fb91c56d1421db0d36d60f96 Mon Sep 17 00:00:00 2001
   2 From: Mike Sterling <mike.sterling@microsoft.com>
   3 Date: Tue, 6 Sep 2011 16:10:55 -0700
   4 Subject: Staging: hv: Add support for >2 TB LUN in storage driver.
   5
   6 From: Mike Sterling <mike.sterling@microsoft.com>
   7
   8 commit cf55f4a8b6243b42fb91c56d1421db0d36d60f96 upstream.
   9
  10 If a LUN larger than 2 TB is attached to a Linux VM on Hyper-V, we currently
  11 report a maximum size of 2 TB. This patch resolves the issue in hv_storvsc.
  12 Thanks to Robert Scheck <robert.scheck@etes.de> for reporting the issue.
  13
  14 Reported-by: Robert Scheck <robert.scheck@etes.de>
  15 Signed-off-by: Mike Sterling <mike.sterling@microsoft.com>
  16 Signed-off-by: K.Y. Srinivasan <kys@microsoft.com>
  17 Signed-off-by: Haiyang Zhang <haiyangz@microsoft.com>
  18 Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
  19
  20 ---
  21  drivers/staging/hv/hyperv_storage.h |    1 +
  22  drivers/staging/hv/storvsc_drv.c    |    2 ++
  23  2 files changed, 3 insertions(+)
  24
  25 --- a/drivers/staging/hv/hyperv_storage.h
  26 +++ b/drivers/staging/hv/hyperv_storage.h
  27 @@ -218,6 +218,7 @@ struct vstor_packet {
  28  #define STORVSC_MAX_LUNS_PER_TARGET                    64
  29  #define STORVSC_MAX_TARGETS                            1
  30  #define STORVSC_MAX_CHANNELS                           1
  31 +#define STORVSC_MAX_CMD_LEN                            16
  32
  33  struct hv_storvsc_request;
  34
  35 --- a/drivers/staging/hv/storvsc_drv.c
  36 +++ b/drivers/staging/hv/storvsc_drv.c
  37 @@ -701,6 +701,8 @@ static int storvsc_probe(struct hv_devic
  38         host->max_id = STORVSC_MAX_TARGETS;
  39         /* max # of channels */
  40         host->max_channel = STORVSC_MAX_CHANNELS - 1;
  41 +       /* max cmd length */
  42 +       host->max_cmd_len = STORVSC_MAX_CMD_LEN;
  43
  44         /* Register the HBA and start the scsi bus scan */
  45         ret = scsi_add_host(host, &device->device);