diff options
| author | Dan Carpenter <error27@gmail.com> | 2011-03-17 22:39:49 +0300 |
|---|---|---|
| committer | Sarah Sharp <sarah.a.sharp@linux.intel.com> | 2011-04-13 16:19:47 -0700 |
| commit | 22e0487047567252d5677ff35766cd884375efc2 (patch) | |
| tree | 792d135afe30d6af87d38ff5a8eb010d39c86053 | |
| parent | 5a6c2f3ff039154872ce597952f8b8900ea0d732 (diff) | |
| download | linux-22e0487047567252d5677ff35766cd884375efc2.tar.gz linux-22e0487047567252d5677ff35766cd884375efc2.tar.bz2 linux-22e0487047567252d5677ff35766cd884375efc2.zip | |
USB: xhci: unsigned char never equals -1
There were some places that compared port_speed == -1 where port_speed
is a u8. This doesn't work unless we cast the -1 to u8. Some places
did it correctly.
Instead of using -1 directly, I've created a DUPLICATE_ENTRY define
which does the cast and is more descriptive as well.
Signed-off-by: Dan Carpenter <error27@gmail.com>
Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
| -rw-r--r-- | drivers/usb/host/xhci-mem.c | 8 | ||||
| -rw-r--r-- | drivers/usb/host/xhci-ring.c | 4 | ||||
| -rw-r--r-- | drivers/usb/host/xhci.h | 3 |
3 files changed, 9 insertions, 6 deletions
diff --git a/drivers/usb/host/xhci-mem.c b/drivers/usb/host/xhci-mem.c index a003e79aacdc..ab7fc2b71a8c 100644 --- a/drivers/usb/host/xhci-mem.c +++ b/drivers/usb/host/xhci-mem.c @@ -846,7 +846,7 @@ static u32 xhci_find_real_port_number(struct xhci_hcd *xhci, * Skip ports that don't have known speeds, or have duplicate * Extended Capabilities port speed entries. */ - if (port_speed == 0 || port_speed == -1) + if (port_speed == 0 || port_speed == DUPLICATE_ENTRY) continue; /* @@ -1727,12 +1727,12 @@ static void xhci_add_in_port(struct xhci_hcd *xhci, unsigned int num_ports, * found a similar duplicate. */ if (xhci->port_array[i] != major_revision && - xhci->port_array[i] != (u8) -1) { + xhci->port_array[i] != DUPLICATE_ENTRY) { if (xhci->port_array[i] == 0x03) xhci->num_usb3_ports--; else xhci->num_usb2_ports--; - xhci->port_array[i] = (u8) -1; + xhci->port_array[i] = DUPLICATE_ENTRY; } /* FIXME: Should we disable the port? */ continue; @@ -1831,7 +1831,7 @@ static int xhci_setup_port_arrays(struct xhci_hcd *xhci, gfp_t flags) for (i = 0; i < num_ports; i++) { if (xhci->port_array[i] == 0x03 || xhci->port_array[i] == 0 || - xhci->port_array[i] == -1) + xhci->port_array[i] == DUPLICATE_ENTRY) continue; xhci->usb2_ports[port_index] = diff --git a/drivers/usb/host/xhci-ring.c b/drivers/usb/host/xhci-ring.c index cfc1ad92473f..c6d1462aa1c3 100644 --- a/drivers/usb/host/xhci-ring.c +++ b/drivers/usb/host/xhci-ring.c @@ -1209,7 +1209,7 @@ static unsigned int find_faked_portnum_from_hw_portnum(struct usb_hcd *hcd, * Skip ports that don't have known speeds, or have duplicate * Extended Capabilities port speed entries. */ - if (port_speed == 0 || port_speed == -1) + if (port_speed == 0 || port_speed == DUPLICATE_ENTRY) continue; /* @@ -1260,7 +1260,7 @@ static void handle_port_status(struct xhci_hcd *xhci, port_id); goto cleanup; } - if (major_revision == (u8) -1) { + if (major_revision == DUPLICATE_ENTRY) { xhci_warn(xhci, "Event for port %u duplicated in" "Extended Capabilities, ignoring.\n", port_id); diff --git a/drivers/usb/host/xhci.h b/drivers/usb/host/xhci.h index 91b1a237c11e..bdb78f51735e 100644 --- a/drivers/usb/host/xhci.h +++ b/drivers/usb/host/xhci.h @@ -348,6 +348,9 @@ struct xhci_op_regs { /* Initiate a warm port reset - complete when PORT_WRC is '1' */ #define PORT_WR (1 << 31) +/* We mark duplicate entries with -1 */ +#define DUPLICATE_ENTRY ((u8)(-1)) + /* Port Power Management Status and Control - port_power_base bitmasks */ /* Inactivity timer value for transitions into U1, in microseconds. * Timeout can be up to 127us. 0xFF means an infinite timeout. |