Hello, Alright, I don't have access to mcp51 but tested with mcp55 and could reproduce similar problem. It seems nIEN on mcp55 is stuck once set and iHOS104 doesn't set I on D2H FIS if nIEN is set on command H2D FIS, which the SATA standard specifically mandates not to do. So, the combination of buggy mcp55 ctl handling + buggy iHOS104 nIEN handling leads to nobody raising interrupt. The problem is that the problem I'm seeing is not completely identical to the one you're seeing. The difference could be coming from different firmware version on the drives or different controllers. Anyways, can you please give a shot at the attached patch? Thanks. -- tejun
diff --git a/drivers/ata/sata_nv.c b/drivers/ata/sata_nv.c index baa8f0d..69d23c2 100644 --- a/drivers/ata/sata_nv.c +++ b/drivers/ata/sata_nv.c @@ -1669,7 +1669,6 @@ static void nv_mcp55_freeze(struct ata_port *ap) mask = readl(mmio_base + NV_INT_ENABLE_MCP55); mask &= ~(NV_INT_ALL_MCP55 << shift); writel(mask, mmio_base + NV_INT_ENABLE_MCP55); - ata_sff_freeze(ap); } static void nv_mcp55_thaw(struct ata_port *ap) @@ -1683,7 +1682,6 @@ static void nv_mcp55_thaw(struct ata_port *ap) mask = readl(mmio_base + NV_INT_ENABLE_MCP55); mask |= (NV_INT_MASK_MCP55 << shift); writel(mask, mmio_base + NV_INT_ENABLE_MCP55); - ata_sff_thaw(ap); } static void nv_adma_error_handler(struct ata_port *ap)
