ntb: ntb_hw_intel: Skylake doorbells should be 32bits, not 64bits

Fixing doorbell register length to 32bits per spec. On Skylake NTB, the
doorbell registers are 32bit write only registers. The source for the
doorbell is a 64bit register that shows the interrupt bits.

Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Fixes: 783dfa6cc41b ("ntb: Adding Skylake Xeon NTB support")
Acked-by: Allen Hubbe <Allen.Hubbe@dell.com>
Signed-off-by: Jon Mason <jdmason@kudzu.us>

diff --git a/drivers/ntb/hw/intel/ntb_hw_intel.c b/drivers/ntb/hw/intel/ntb_hw_intel.c
index c00238491673766e05bc5bd2d2d3bec4aac30484..7b3b6fd63d7d7caa21bbc9c517c4e28910b0548b 100644 (file)
--- a/drivers/ntb/hw/intel/ntb_hw_intel.c
+++ b/drivers/ntb/hw/intel/ntb_hw_intel.c
@@ -2878,7 +2878,7 @@ static const struct intel_ntb_reg skx_reg = {
        .link_is_up             = xeon_link_is_up,
        .db_ioread              = skx_db_ioread,
        .db_iowrite             = skx_db_iowrite,
-       .db_size                = sizeof(u64),
+       .db_size                = sizeof(u32),
        .ntb_ctl                = SKX_NTBCNTL_OFFSET,
        .mw_bar                 = {2, 4},
 };