diff options
author | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-10-12 15:49:10 -0700 |
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committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-10-12 15:49:10 -0700 |
commit | 117494a1b65183f0e3fcc817b07944bc5c465050 (patch) | |
tree | c375cf06bdf869f2b870fe61808b060c4fadab45 /drivers/usb/core/urb.c | |
parent | 4d5709a7b7d54fc5882d2943a14988a92d48c00a (diff) | |
parent | d1aa3e6aa8edfeb864af7c930523d9e588b28bea (diff) |
Merge master.kernel.org:/pub/scm/linux/kernel/git/gregkh/usb-2.6
* master.kernel.org:/pub/scm/linux/kernel/git/gregkh/usb-2.6: (142 commits)
USB: fix race in autosuspend reschedule
atmel_usba_udc: Keep track of the device status
USB: Nikon D40X unusual_devs entry
USB: serial core should respect driver requirements
USB: documentation for USB power management
USB: skip autosuspended devices during system resume
USB: mutual exclusion for EHCI init and port resets
USB: allow usbstorage to have LUNS greater than 2Tb
USB: Adding support for SHARP WS011SH to ipaq.c
USB: add atmel_usba_udc driver
USB: ohci SSB bus glue
USB: ehci build fixes on au1xxx, ppc-soc
USB: add runtime frame_no quirk for big-endian OHCI
USB: funsoft: Fix termios
USB: visor: termios bits
USB: unusual_devs entry for Nikon DSC D2Xs
USB: re-remove <linux/usb_sl811.h>
USB: move <linux/usb_gadget.h> to <linux/usb/gadget.h>
USB: Export URB statistics for powertop
USB: serial gadget: Disable endpoints on unload
...
Diffstat (limited to 'drivers/usb/core/urb.c')
-rw-r--r-- | drivers/usb/core/urb.c | 106 |
1 files changed, 61 insertions, 45 deletions
diff --git a/drivers/usb/core/urb.c b/drivers/usb/core/urb.c index be630228461..c20c03aaf01 100644 --- a/drivers/usb/core/urb.c +++ b/drivers/usb/core/urb.c @@ -3,6 +3,7 @@ #include <linux/bitops.h> #include <linux/slab.h> #include <linux/init.h> +#include <linux/log2.h> #include <linux/usb.h> #include <linux/wait.h> #include "hcd.h" @@ -38,7 +39,6 @@ void usb_init_urb(struct urb *urb) if (urb) { memset(urb, 0, sizeof(*urb)); kref_init(&urb->kref); - spin_lock_init(&urb->lock); INIT_LIST_HEAD(&urb->anchor_list); } } @@ -277,44 +277,58 @@ EXPORT_SYMBOL_GPL(usb_unanchor_urb); */ int usb_submit_urb(struct urb *urb, gfp_t mem_flags) { - int pipe, temp, max; - struct usb_device *dev; - int is_out; + int xfertype, max; + struct usb_device *dev; + struct usb_host_endpoint *ep; + int is_out; if (!urb || urb->hcpriv || !urb->complete) return -EINVAL; - if (!(dev = urb->dev) || - (dev->state < USB_STATE_DEFAULT) || - (!dev->bus) || (dev->devnum <= 0)) + if (!(dev = urb->dev) || dev->state < USB_STATE_DEFAULT) return -ENODEV; - if (dev->bus->controller->power.power_state.event != PM_EVENT_ON - || dev->state == USB_STATE_SUSPENDED) - return -EHOSTUNREACH; + /* For now, get the endpoint from the pipe. Eventually drivers + * will be required to set urb->ep directly and we will eliminate + * urb->pipe. + */ + ep = (usb_pipein(urb->pipe) ? dev->ep_in : dev->ep_out) + [usb_pipeendpoint(urb->pipe)]; + if (!ep) + return -ENOENT; + + urb->ep = ep; urb->status = -EINPROGRESS; urb->actual_length = 0; /* Lots of sanity checks, so HCDs can rely on clean data * and don't need to duplicate tests */ - pipe = urb->pipe; - temp = usb_pipetype(pipe); - is_out = usb_pipeout(pipe); + xfertype = usb_endpoint_type(&ep->desc); + if (xfertype == USB_ENDPOINT_XFER_CONTROL) { + struct usb_ctrlrequest *setup = + (struct usb_ctrlrequest *) urb->setup_packet; + + if (!setup) + return -ENOEXEC; + is_out = !(setup->bRequestType & USB_DIR_IN) || + !setup->wLength; + } else { + is_out = usb_endpoint_dir_out(&ep->desc); + } - if (!usb_pipecontrol(pipe) && dev->state < USB_STATE_CONFIGURED) - return -ENODEV; + /* Cache the direction for later use */ + urb->transfer_flags = (urb->transfer_flags & ~URB_DIR_MASK) | + (is_out ? URB_DIR_OUT : URB_DIR_IN); - /* FIXME there should be a sharable lock protecting us against - * config/altsetting changes and disconnects, kicking in here. - * (here == before maxpacket, and eventually endpoint type, - * checks get made.) - */ + if (xfertype != USB_ENDPOINT_XFER_CONTROL && + dev->state < USB_STATE_CONFIGURED) + return -ENODEV; - max = usb_maxpacket(dev, pipe, is_out); + max = le16_to_cpu(ep->desc.wMaxPacketSize); if (max <= 0) { dev_dbg(&dev->dev, "bogus endpoint ep%d%s in %s (bad maxpacket %d)\n", - usb_pipeendpoint(pipe), is_out ? "out" : "in", + usb_endpoint_num(&ep->desc), is_out ? "out" : "in", __FUNCTION__, max); return -EMSGSIZE; } @@ -323,7 +337,7 @@ int usb_submit_urb(struct urb *urb, gfp_t mem_flags) * but drivers only control those sizes for ISO. * while we're checking, initialize return status. */ - if (temp == PIPE_ISOCHRONOUS) { + if (xfertype == USB_ENDPOINT_XFER_ISOC) { int n, len; /* "high bandwidth" mode, 1-3 packets/uframe? */ @@ -358,20 +372,20 @@ int usb_submit_urb(struct urb *urb, gfp_t mem_flags) /* enforce simple/standard policy */ allowed = (URB_NO_TRANSFER_DMA_MAP | URB_NO_SETUP_DMA_MAP | - URB_NO_INTERRUPT); - switch (temp) { - case PIPE_BULK: + URB_NO_INTERRUPT | URB_DIR_MASK); + switch (xfertype) { + case USB_ENDPOINT_XFER_BULK: if (is_out) allowed |= URB_ZERO_PACKET; /* FALLTHROUGH */ - case PIPE_CONTROL: + case USB_ENDPOINT_XFER_CONTROL: allowed |= URB_NO_FSBR; /* only affects UHCI */ /* FALLTHROUGH */ default: /* all non-iso endpoints */ if (!is_out) allowed |= URB_SHORT_NOT_OK; break; - case PIPE_ISOCHRONOUS: + case USB_ENDPOINT_XFER_ISOC: allowed |= URB_ISO_ASAP; break; } @@ -393,9 +407,9 @@ int usb_submit_urb(struct urb *urb, gfp_t mem_flags) * supports different values... this uses EHCI/UHCI defaults (and * EHCI can use smaller non-default values). */ - switch (temp) { - case PIPE_ISOCHRONOUS: - case PIPE_INTERRUPT: + switch (xfertype) { + case USB_ENDPOINT_XFER_ISOC: + case USB_ENDPOINT_XFER_INT: /* too small? */ if (urb->interval <= 0) return -EINVAL; @@ -405,29 +419,27 @@ int usb_submit_urb(struct urb *urb, gfp_t mem_flags) // NOTE usb handles 2^15 if (urb->interval > (1024 * 8)) urb->interval = 1024 * 8; - temp = 1024 * 8; + max = 1024 * 8; break; case USB_SPEED_FULL: /* units are frames/msec */ case USB_SPEED_LOW: - if (temp == PIPE_INTERRUPT) { + if (xfertype == USB_ENDPOINT_XFER_INT) { if (urb->interval > 255) return -EINVAL; // NOTE ohci only handles up to 32 - temp = 128; + max = 128; } else { if (urb->interval > 1024) urb->interval = 1024; // NOTE usb and ohci handle up to 2^15 - temp = 1024; + max = 1024; } break; default: return -EINVAL; } - /* power of two? */ - while (temp > urb->interval) - temp >>= 1; - urb->interval = temp; + /* Round down to a power of 2, no more than max */ + urb->interval = min(max, 1 << ilog2(urb->interval)); } return usb_hcd_submit_urb(urb, mem_flags); @@ -496,8 +508,10 @@ int usb_unlink_urb(struct urb *urb) { if (!urb) return -EINVAL; - if (!(urb->dev && urb->dev->bus)) + if (!urb->dev) return -ENODEV; + if (!urb->ep) + return -EIDRM; return usb_hcd_unlink_urb(urb, -ECONNRESET); } @@ -523,19 +537,21 @@ int usb_unlink_urb(struct urb *urb) */ void usb_kill_urb(struct urb *urb) { + static DEFINE_MUTEX(reject_mutex); + might_sleep(); - if (!(urb && urb->dev && urb->dev->bus)) + if (!(urb && urb->dev && urb->ep)) return; - spin_lock_irq(&urb->lock); + mutex_lock(&reject_mutex); ++urb->reject; - spin_unlock_irq(&urb->lock); + mutex_unlock(&reject_mutex); usb_hcd_unlink_urb(urb, -ENOENT); wait_event(usb_kill_urb_queue, atomic_read(&urb->use_count) == 0); - spin_lock_irq(&urb->lock); + mutex_lock(&reject_mutex); --urb->reject; - spin_unlock_irq(&urb->lock); + mutex_unlock(&reject_mutex); } /** |