6.12-stable review patch. If anyone has any objections, please let me know.
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From: Michael Kelley mhklinux@outlook.com
commit 380b75d3078626aadd0817de61f3143f5db6e393 upstream.
vmbus_sendpacket_mpb_desc() is currently used only by the storvsc driver and is hardcoded to create a single GPA range. To allow it to also be used by the netvsc driver to create multiple GPA ranges, no longer hardcode as having a single GPA range. Allow the calling driver to specify the rangecount in the supplied descriptor.
Update the storvsc driver to reflect this new approach.
Cc: stable@vger.kernel.org # 6.1.x Signed-off-by: Michael Kelley mhklinux@outlook.com Link: https://patch.msgid.link/20250513000604.1396-2-mhklinux@outlook.com Signed-off-by: Jakub Kicinski kuba@kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/hv/channel.c | 6 +++--- drivers/scsi/storvsc_drv.c | 1 + 2 files changed, 4 insertions(+), 3 deletions(-)
--- a/drivers/hv/channel.c +++ b/drivers/hv/channel.c @@ -1136,9 +1136,10 @@ int vmbus_sendpacket_pagebuffer(struct v EXPORT_SYMBOL_GPL(vmbus_sendpacket_pagebuffer);
/* - * vmbus_sendpacket_multipagebuffer - Send a multi-page buffer packet + * vmbus_sendpacket_mpb_desc - Send one or more multi-page buffer packets * using a GPADL Direct packet type. - * The buffer includes the vmbus descriptor. + * The desc argument must include space for the VMBus descriptor. The + * rangecount field must already be set. */ int vmbus_sendpacket_mpb_desc(struct vmbus_channel *channel, struct vmbus_packet_mpb_array *desc, @@ -1160,7 +1161,6 @@ int vmbus_sendpacket_mpb_desc(struct vmb desc->length8 = (u16)(packetlen_aligned >> 3); desc->transactionid = VMBUS_RQST_ERROR; /* will be updated in hv_ringbuffer_write() */ desc->reserved = 0; - desc->rangecount = 1;
bufferlist[0].iov_base = desc; bufferlist[0].iov_len = desc_size; --- a/drivers/scsi/storvsc_drv.c +++ b/drivers/scsi/storvsc_drv.c @@ -1819,6 +1819,7 @@ static int storvsc_queuecommand(struct S return SCSI_MLQUEUE_DEVICE_BUSY; }
+ payload->rangecount = 1; payload->range.len = length; payload->range.offset = offset_in_hvpg;