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storvsc: use correct defaults for values determined by protocol negotiation

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Use correct defaults for values determined by protocol negotiation,
instead of resetting them with every scsi controller.

Tested-by: Alex Ng <alexng@microsoft.com>
Signed-off-by: Keith Mange <keith.mange@microsoft.com>
Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: James Bottomley <JBottomley@Odin.com>
This commit is contained in:
Keith Mange 2015-08-13 08:43:49 -07:00 committed by James Bottomley
parent 1a3631081d
commit cb11feada9
1 changed files with 19 additions and 14 deletions
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33
drivers/scsi/storvsc_drv.c
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@ -151,19 +151,17 @@ struct hv_fc_wwn_packet {
/*
* Sense buffer size changed in win8; have a run-time
* variable to track the size we should use.
* variable to track the size we should use. This value will
* likely change during protocol negotiation but it is valid
* to start by assuming pre-Win8.
*/
static int sense_buffer_size;
static int sense_buffer_size = PRE_WIN8_STORVSC_SENSE_BUFFER_SIZE;
/*
* The size of the vmscsi_request has changed in win8. The
* additional size is because of new elements added to the
* structure. These elements are valid only when we are talking
* to a win8 host.
* Track the correction to size we need to apply.
*/
static int vmscsi_size_delta;
* The storage protocol version is determined during the
* initial exchange with the host. It will indicate which
* storage functionality is available in the host.
*/
static int vmstor_proto_version;
struct vmscsi_win8_extension {
@ -208,6 +206,17 @@ struct vmscsi_request {
} __attribute((packed));
/*
* The size of the vmscsi_request has changed in win8. The
* additional size is because of new elements added to the
* structure. These elements are valid only when we are talking
* to a win8 host.
* Track the correction to size we need to apply. This value
* will likely change during protocol negotiation but it is
* valid to start by assuming pre-Win8.
*/
static int vmscsi_size_delta = sizeof(struct vmscsi_win8_extension);
/*
* The list of storage protocols in order of preference.
*/
@ -1810,14 +1819,10 @@ static int storvsc_probe(struct hv_device *device,
*/
if (vmbus_proto_version < VERSION_WIN8) {
sense_buffer_size = PRE_WIN8_STORVSC_SENSE_BUFFER_SIZE;
vmscsi_size_delta = sizeof(struct vmscsi_win8_extension);
max_luns_per_target = STORVSC_IDE_MAX_LUNS_PER_TARGET;
max_targets = STORVSC_IDE_MAX_TARGETS;
max_channels = STORVSC_IDE_MAX_CHANNELS;
} else {
sense_buffer_size = POST_WIN7_STORVSC_SENSE_BUFFER_SIZE;
vmscsi_size_delta = 0;
max_luns_per_target = STORVSC_MAX_LUNS_PER_TARGET;
max_targets = STORVSC_MAX_TARGETS;
max_channels = STORVSC_MAX_CHANNELS;