| Date | Wed, 09 Nov 2011 13:30:57 -0800 | From | Greg KH <> | Subject | [010/264] Staging: hv: Add support for >2 TB LUN in storage driver. |
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3.1-stable review patch. If anyone has any objections, please let me know.
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From: Mike Sterling <mike.sterling@microsoft.com>
commit cf55f4a8b6243b42fb91c56d1421db0d36d60f96 upstream.
If a LUN larger than 2 TB is attached to a Linux VM on Hyper-V, we currently report a maximum size of 2 TB. This patch resolves the issue in hv_storvsc. Thanks to Robert Scheck <robert.scheck@etes.de> for reporting the issue.
Reported-by: Robert Scheck <robert.scheck@etes.de> Signed-off-by: Mike Sterling <mike.sterling@microsoft.com> Signed-off-by: K.Y. Srinivasan <kys@microsoft.com> Signed-off-by: Haiyang Zhang <haiyangz@microsoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
--- drivers/staging/hv/hyperv_storage.h | 1 + drivers/staging/hv/storvsc_drv.c | 2 ++ 2 files changed, 3 insertions(+)
--- a/drivers/staging/hv/hyperv_storage.h +++ b/drivers/staging/hv/hyperv_storage.h @@ -218,6 +218,7 @@ struct vstor_packet { #define STORVSC_MAX_LUNS_PER_TARGET 64 #define STORVSC_MAX_TARGETS 1 #define STORVSC_MAX_CHANNELS 1 +#define STORVSC_MAX_CMD_LEN 16 struct hv_storvsc_request; --- a/drivers/staging/hv/storvsc_drv.c +++ b/drivers/staging/hv/storvsc_drv.c @@ -701,6 +701,8 @@ static int storvsc_probe(struct hv_devic host->max_id = STORVSC_MAX_TARGETS; /* max # of channels */ host->max_channel = STORVSC_MAX_CHANNELS - 1; + /* max cmd length */ + host->max_cmd_len = STORVSC_MAX_CMD_LEN; /* Register the HBA and start the scsi bus scan */ ret = scsi_add_host(host, &device->device);
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