diff options
Diffstat (limited to 'drivers/staging/usbip')
| -rw-r--r-- | drivers/staging/usbip/vhci_hcd.c | 30 |
1 files changed, 22 insertions, 8 deletions
diff --git a/drivers/staging/usbip/vhci_hcd.c b/drivers/staging/usbip/vhci_hcd.c index 658c674..d3f11a3 100644 --- a/drivers/staging/usbip/vhci_hcd.c +++ b/drivers/staging/usbip/vhci_hcd.c @@ -92,14 +92,28 @@ static const char * const bit_desc[] = { "R31", /*31*/ }; -static void dump_port_status(u32 status) +static void dump_port_status_diff(u32 prev_status, u32 new_status) { int i = 0; - - pr_debug("status %08x:", status); - for (i = 0; i < 32; i++) { - if (status & (1 << i)) - pr_debug(" %s", bit_desc[i]); + u32 bit = 1; + + pr_debug("status prev -> new: %08x -> %08x\n", prev_status, new_status); + while (bit) { + u32 prev = prev_status & bit; + u32 new = new_status & bit; + char change; + + if (!prev && new) + change = '+'; + else if (prev && !new) + change = '-'; + else + change = ' '; + + if (prev || new) + pr_debug(" %c%s\n", change, bit_desc[i]); + bit <<= 1; + i++; } pr_debug("\n"); } @@ -466,8 +480,8 @@ static int vhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue, pr_debug("port %d\n", rhport); /* Only dump valid port status */ if (rhport >= 0) { - dump_port_status(prev_port_status[rhport]); - dump_port_status(dum->port_status[rhport]); + dump_port_status_diff(prev_port_status[rhport], + dum->port_status[rhport]); } } usbip_dbg_vhci_rh(" bye\n"); |