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path: root/drivers/usb/wusbcore
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2017-03-14USB: wusbcore: fix NULL-deref at probeJohan Hovold1-0/+3
Make sure to check the number of endpoints to avoid dereferencing a NULL-pointer or accessing memory beyond the endpoint array should a malicious device lack the expected endpoints. This specifically fixes the NULL-pointer dereference when probing HWA HC devices. Fixes: df3654236e31 ("wusb: add the Wire Adapter (WA) core") Cc: stable <stable@vger.kernel.org> # 2.6.28 Cc: Inaky Perez-Gonzalez <inaky.perez-gonzalez@intel.com> Cc: David Vrabel <david.vrabel@csr.com> Signed-off-by: Johan Hovold <johan@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-01-10wusbcore: Fix one more crypto-on-the-stack bugAndy Lutomirski1-2/+1
The driver put a constant buffer of all zeros on the stack and pointed a scatterlist entry at it. This doesn't work with virtual stacks. Use ZERO_PAGE instead. Cc: stable@vger.kernel.org # 4.9 only Reported-by: Eric Biggers <ebiggers3@gmail.com> Signed-off-by: Andy Lutomirski <luto@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-11-29usb: fix improper return value when kzalloc failsPan Bian1-0/+1
The comment says function wa_nep_queue() should return 0 if ok, and <0 errno code on error. However, its implementation always returns 0, even if the call to kzalloc() fails. As a result, the return value may be inconsistent with the execution status, which may mislead the callers. This patch fixes the bug, returning -ENOMEM when the call to kzalloc() fails. Signed-off-by: Pan Bian <bianpan2016@163.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-11-29usb: return correct errno on failuresPan Bian1-0/+1
In function __wa_xfer_setup_segs(), variable result takes the return value. Its value should be a negative errno on failures. Because result may be reassigned in a loop, and its value is guaranteed to be not less than 0 during the following repeats of the loop. So when the call to kmalloc() or usb_alloc_urb() fails in the loop, the value of variable result may be 0 (indicates no error), which is inconsistent with the execution status. This patch fixes the bug, initializing variable result with -ENOMEM in the loop. Signed-off-by: Pan Bian <bianpan2016@163.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-11-29usb: return correct errno code when krealloc failsPan Bian1-0/+1
In function wusb_dev_sec_add(), variable result takes the return value. Its value should be negative on failures. When function krealloc() is called, an earlier check of variable result guarantees that the value of result must not be less than "sizeof(*secd)", and result is not reassigned when krealloc() returns a NULL pointer. As a result, a positive value may be returned, which makes it impossible for the caller of wusb_dev_sec_add() to detect the error. This patch fixes the bug by assigning -ENOMEM to result when krealloc() returns NULL. Signed-off-by: Pan Bian <bianpan2016@163.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-11-07wusbcore: wusbhc: use permission-specific DEVICE_ATTR variantsJulia Lawall1-8/+5
Use DEVICE_ATTR_RW for read-write attributes. This simplifies the source code, improves readbility, and reduces the chance of inconsistencies. The semantic patch that makes this change is as follows: (http://coccinelle.lip6.fr/) // <smpl> @rw@ declarer name DEVICE_ATTR; identifier x,x_show,x_store; @@ DEVICE_ATTR(x, \(0644\|S_IRUGO|S_IWUSR\), x_show, x_store); @script:ocaml@ x << rw.x; x_show << rw.x_show; x_store << rw.x_store; @@ if not (x^"_show" = x_show && x^"_store" = x_store) then Coccilib.include_match false @@ declarer name DEVICE_ATTR_RW; identifier rw.x,rw.x_show,rw.x_store; @@ - DEVICE_ATTR(x, \(0644\|S_IRUGO|S_IWUSR\), x_show, x_store); + DEVICE_ATTR_RW(x); // </smpl> Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-11-07wusbcore: dev-sysfs: use permission-specific DEVICE_ATTR variantsJulia Lawall1-3/+3
Use DEVICE_ATTR_WO for write ony attributes and DEVICE_ATTR_RO for read only attributes. This simplifies the source code, improves readbility, and reduces the chance of inconsistencies. The semantic patch for the RO case is as follows: (http://coccinelle.lip6.fr/) // <smpl> @ro@ declarer name DEVICE_ATTR; identifier x,x_show; @@ DEVICE_ATTR(x, \(0444\|S_IRUGO\), x_show, NULL); @script:ocaml@ x << ro.x; x_show << ro.x_show; @@ if not (x^"_show" = x_show) then Coccilib.include_match false @@ declarer name DEVICE_ATTR_RO; identifier ro.x,ro.x_show; @@ - DEVICE_ATTR(x, \(0444\|S_IRUGO\), x_show, NULL); + DEVICE_ATTR_RO(x); // </smpl> Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-10-19wusb: fix error return code in wusb_prf()Wei Yongjun1-1/+3
Fix to return error code -ENOMEM from the kmalloc() error handling case instead of 0, as done elsewhere in this function. Fixes: a19b882c07a6 ("wusb: Stop using the stack for sg crypto scratch space") Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-10-17wusb: Stop using the stack for sg crypto scratch spaceAndy Lutomirski1-22/+37
Pointing an sg list at the stack is verboten and, with CONFIG_VMAP_STACK=y, will malfunction. Use kmalloc for the wusb crypto stack space instead. Untested -- I'm not entirely convinced that this hardware exists in the wild. Signed-off-by: Andy Lutomirski <luto@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-09-13USB: wusbcore: add in missing white space in error message textColin Ian King1-2/+1
A dev_err message spans two lines and the literal string is missing a white space between words. Add the white space and reformat the message to not span multiple lines. Signed-off-by: Colin Ian King <colin.king@canonical.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-08-30usb: wusbcore: wa-nep: don't print on ENOMEMWolfram Sang1-4/+1
All kmalloc-based functions print enough information on failures. Signed-off-by: Wolfram Sang <wsa-dev@sang-engineering.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-08-30usb: wusbcore: security: don't print on ENOMEMWolfram Sang1-3/+1
All kmalloc-based functions print enough information on failures. Signed-off-by: Wolfram Sang <wsa-dev@sang-engineering.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-08-30usb: wusbcore: crypto: don't print on ENOMEMWolfram Sang1-3/+1
All kmalloc-based functions print enough information on failures. Signed-off-by: Wolfram Sang <wsa-dev@sang-engineering.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-08-15usb: wusbcore: wa-xfer: don't print error when allocating urb failsWolfram Sang1-3/+1
kmalloc will print enough information in case of failure. Signed-off-by: Wolfram Sang <wsa-dev@sang-engineering.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-08-15usb: wusbcore: wa-nep: don't print error when allocating urb failsWolfram Sang1-3/+1
kmalloc will print enough information in case of failure. Signed-off-by: Wolfram Sang <wsa-dev@sang-engineering.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-05-09usb: wusbcore: Do not initialise statics to 0.Sandhya Bankar1-1/+1
Do not initialise statics to 0. This patch is found by checkpatch.pl script. Signed-off-by: Sandhya Bankar <bankarsandhya512@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-05-09usb: wusbcore: Remove space before ',' and '(' .Sandhya Bankar1-2/+2
Remove space before ',' and '(' . This patch is detected by checkpatch.pl Signed-off-by: Sandhya Bankar <bankarsandhya512@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-04-18usb: wusbcore: remove unreachable codeSudip Mukherjee1-1/+0
The call to wusb_dev_sysfs_rm() which is just after return will never be executed. On checking the code, wusb_dev_sysfs_add() is the last one to be executed so even if that fails we do not need wusb_dev_sysfs_rm() in the error path. Signed-off-by: Sudip Mukherjee <sudip.mukherjee@codethink.co.uk> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-03-18Merge tag 'usb-4.6-rc1' of ↵Linus Torvalds1-1/+1
git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb Pull USB updates from Greg KH: "Here is the big USB patchset for 4.6-rc1. The normal mess is here, gadget and xhci fixes and updates, and lots of other driver updates and cleanups as well. Full details are in the shortlog. All have been in linux-next for a while with no reported issues" * tag 'usb-4.6-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb: (266 commits) USB: core: let USB device know device node usb: devio: Add ioctl to disallow detaching kernel USB drivers. usb: gadget: f_acm: Fix configfs attr name usb: udc: lpc32xx: remove USB PLL and USB OTG clock management usb: udc: lpc32xx: remove direct access to clock controller registers usb: udc: lpc32xx: switch to clock prepare/unprepare model usb: renesas_usbhs: gadget: fix giveback status code in usbhsg_pipe_disable() usb: gadget: renesas_usb3: Use ARCH_RENESAS usb: dwc2: Fix issues in dwc2_complete_non_isoc_xfer_ddma() usb: dwc2: Add support for Lantiq ARX and XRX SoCs usb: phy: generic: Handle late registration of gadget usb: gadget: bdc_udc: fix race condition in bdc_udc_exit() usb: musb: core: added missing const qualifier to musb_hdrc_platform_data::config usb: dwc2: Move host-specific core functions into hcd.c usb: dwc2: Move register save and restore functions usb: dwc2: Use kmem_cache_free() usb: dwc2: host: If using uframe scheduler, end splits better usb: dwc2: host: Totally redo the microframe scheduler usb: dwc2: host: Properly set even/odd frame usb: dwc2: host: Add dwc2_hcd_get_future_frame_number() call ...
2016-01-27wusb: Use skcipherHerbert Xu1-14/+16
This patch replaces uses of blkcipher with skcipher. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2016-01-25USB: core, wusbcore: use bus_to_hcdGeliang Tang1-1/+1
Use bus_to_hcd() instead of open-coding it. Signed-off-by: Geliang Tang <geliangtang@163.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-04-03wusbcore: rh: use USB_DT_HUBSergei Shtylyov1-1/+1
Fix using the bare number to set the 'bDescriptorType' field of the Hub Descriptor while the value is #define'd in <linux/usb/ch11.h>. Signed-off-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-02-15Merge tag 'usb-3.20-rc1' of ↵Linus Torvalds1-2/+2
git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb Pull USB patches from Greg KH: "Here's the big pull request for the USB driver tree for 3.20-rc1. Nothing major happening here, just lots of gadget driver updates, new device ids, and a bunch of cleanups. All of these have been in linux-next for a while with no reported issues" * tag 'usb-3.20-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb: (299 commits) usb: musb: fix device hotplug behind hub usb: dwc2: Fix a bug in reading the endpoint directions from reg. staging: emxx_udc: fix the build error usb: Retry port status check on resume to work around RH bugs Revert "usb: Reset USB-3 devices on USB-3 link bounce" uhci-hub: use HUB_CHAR_* usb: kconfig: replace PPC_OF with PPC ehci-pci: disable for Intel MID platforms (update) usb: gadget: Kconfig: use bool instead of boolean usb: musb: blackfin: remove incorrect __exit_p() USB: fix use-after-free bug in usb_hcd_unlink_urb() ehci-pci: disable for Intel MID platforms usb: host: pci_quirks: joing string literals USB: add flag for HCDs that can't receive wakeup requests (isp1760-hcd) USB: usbfs: allow URBs to be reaped after disconnection cdc-acm: kill unnecessary messages cdc-acm: add sanity checks usb: phy: phy-generic: Fix USB PHY gpio reset usb: dwc2: fix USB core dependencies usb: renesas_usbhs: fix NULL pointer dereference in dma_release_channel() ...
2015-02-14usb: use %*pb[l] to print bitmaps including cpumasks and nodemasksTejun Heo3-11/+6
printk and friends can now format bitmaps using '%*pb[l]'. cpumask and nodemask also provide cpumask_pr_args() and nodemask_pr_args() respectively which can be used to generate the two printf arguments necessary to format the specified cpu/nodemask. * drivers/uwb/drp.c::uwb_drp_handle_alien_drp() was formatting mas.bm into a buffer but never used it. Removed. Signed-off-by: Tejun Heo <tj@kernel.org> Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2015-01-25wusbcore: rh: use HUB_CHAR_*Sergei Shtylyov1-2/+2
Fix using the bare numbers to set the 'wHubCharacteristics' field of the Hub Descriptor while the values are #define'd in <linux/usb/ch11.h>. Signed-off-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-12-03wusb: replace memset by memzero_explicitJulia Lawall2-5/+5
Memset on a local variable may be removed when it is called just before the variable goes out of scope. Using memzero_explicit defeats this optimization. A simplified version of the semantic patch that makes this change is as follows: (http://coccinelle.lip6.fr/) // <smpl> @@ identifier x; type T; @@ { ... when any T x[...]; ... when any when exists - memset + memzero_explicit (x, -0, ...) ... when != x when strict } // </smpl> This change was suggested by Daniel Borkmann <dborkman@redhat.com> Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-09-24usb: hub: rename khubd to hub_wq in documentation and commentsPetr Mladek2-4/+4
USB hub has started to use a workqueue instead of kthread. Let's update the documentation and comments here and there. This patch mostly just replaces "khubd" with "hub_wq". There are only few exceptions where the whole sentence was updated. These more complicated changes can be found in the following files: Documentation/usb/hotplug.txt drivers/net/usb/usbnet.c drivers/usb/core/hcd.c drivers/usb/host/ohci-hcd.c drivers/usb/host/xhci.c Signed-off-by: Petr Mladek <pmladek@suse.cz> Acked-by: Alan Stern <stern@rowland.harvard.edu> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-09-24usb: wusbcore: fix device disconnect on rekey timeoutThomas Pugliese2-1/+19
If three or more wireless devices are connected and two of them disconnect between 1-3 seconds apart, it can cause the HWA to disconnect the remaining devices due to failing to see a DN_Alive message from them. This happens because when the HWA detects that the first device is gone, it will attempt to rekey the remaining devices. If one of the devices is not responding because it has also been disconnected but not yet timed out, the synchronous rekey operation running on the wusbd workqueue can block for up to 5 seconds. This will prevent the KEEPALIVE timer from running and DN_Alive messages from being processed because they are processed by the same workqueue. This patch moves the rekey operation to a separate workqueue since it is the only wusb work item that needs to communicate directly with wireless devices. The rest of the WUSB work items either perform no device IO or communicate directly with the host controller and should not be blocked out by a non-responding wireless device. Signed-off-by: Thomas Pugliese <thomas.pugliese@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-09-24usb: wusbcore: skip done segs before completing aborted transferThomas Pugliese1-3/+14
When completing an aborted transfer, skip done segs before calling wa_complete_remaining_xfer_segs to avoid a runtime warning. The warning is harmless in this case but avoiding it prevents false error reports. Signed-off-by: Thomas Pugliese <thomas.pugliese@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-09-24usb: wusbcore: USB_WUSB_CBAF depends on USBThomas Pugliese1-0/+1
Add USB build dependency for USB_WUSB_CBAF. Signed-off-by: Thomas Pugliese <thomas.pugliese@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-09-24usb: wusbcore: remove USB_WUSB build dependency on PCIThomas Pugliese1-1/+0
Wireless USB does not require PCI so remove USB_WUSB build dependency on PCI. Signed-off-by: Thomas Pugliese <thomas.pugliese@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-09-24wusb: delete double assignmentJulia Lawall1-2/+0
Delete successive assignments to the same location. A simplified version of the semantic match that finds this problem is as follows: (http://coccinelle.lip6.fr/) // <smpl> @@ expression i; @@ *i = ...; i = ...; // </smpl> Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-08-19usb: wusbcore: fix below build warningPeter Chen1-2/+1
linux-2.6/drivers/usb/wusbcore/wa-xfer.c: In function 'wa_buf_in_cb': linux-2.6/drivers/usb/wusbcore/wa-xfer.c:2590: warning: 'rpipe' may be used uninitialized in this function Signed-off-by: Peter Chen <peter.chen@freescale.com> Suggested-by: Thomas Pugliese <thomas.pugliese@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-05-28USB: wusbcore: fix control-pipe directionsJohan Hovold1-2/+2
Fix incorrect pipe directions in control requests (which has been silently fixed up by USB core). Signed-off-by: Johan Hovold <jhovold@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-04-24usb: wusbcore: fix panic in wusbhc_chid_setThomas Pugliese1-1/+1
If no valid CHID value has previously been set on an HWA, writing a value of all zeros will cause a kernel panic in uwb_radio_stop because wusbhc->uwb_rc has not been set. This patch skips the call to uwb_radio_stop if wusbhc->uwb_rc has not been initialized. Signed-off-by: Thomas Pugliese <thomas.pugliese@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-04-24usb: wusbcore: convert nested lock to use spin_lock instead of spin_lock_irqThomas Pugliese1-2/+2
Nesting a spin_lock_irq/unlock_irq inside a lock that has already disabled interrupts will enable interrupts before we are ready when spin_unlock_irq is called. This patch converts the inner lock to use spin_lock and spin_unlock instead. Signed-off-by: Thomas Pugliese <thomas.pugliese@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-03-09usb: wusbcore: use multiple urbs for HWA iso transfer result frame readsThomas Pugliese3-74/+134
Submit multiple concurrent urbs for HWA isochronous transfer result data frame reads. This keeps the read pipeline full and significantly improves performance in cases where the frame reads cannot be combined because they are not contiguous or multiples of the max packet size. Signed-off-by: Thomas Pugliese <thomas.pugliese@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-03-09usb: wusbcore: combine iso transfer result frame reads when possibleThomas Pugliese1-30/+76
When reading the transfer result data for an isochronous in request, if the current frame actual_length is contiguous with the next frame and actual_length is a multiple of the DTI endpoint max packet size, combine the current frame with the next frame in a single URB. This reduces the number of URBs that must be submitted in that case which increases performance and reduces CPU interrupt overhead. Signed-off-by: Thomas Pugliese <thomas.pugliese@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-03-08usb: wusbcore: disable transfer notifications for Alereon HWAsThomas Pugliese2-34/+60
The HWA driver does not do anything with transfer notifications after receiving the first one and the Alereon HWA allows them to be disabled as a performance optimization. This patch sends a vendor specific command to the Alereon HWA on startup to disable transfer notifications. If the command is successful, the DTI system is started immediately since that would normally be started upon the first reception of a transfer notification which will no longer be sent. Signed-off-by: Thomas Pugliese <thomas.pugliese@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-03-08usb: wusbcore: don't mark WA_SEG_DTI_PENDING segs as done in urb_dequeueThomas Pugliese1-1/+10
Data for transfer segments in the WA_SEG_DTI_PENDING state is actively being read by the driver. Let the buffer read callback handle the transfer cleanup since cleaning it up in wa_urb_dequeue will cause the read callback to access invalid memory if the transfer is completed. Signed-off-by: Thomas Pugliese <thomas.pugliese@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-03-08usb: wusbcore: fix potential double list_del on urb dequeueThomas Pugliese1-2/+6
This patch locks rpipe->seg_lock around the entire transfer segment cleanup loop in wa_urb_dequeue instead of just one case of the switch statement. This fixes a race between __wa_xfer_delayed_run and wa_urb_dequeue where a transfer segment in the WA_SEG_DELAYED state could be removed from the rpipe seg_list twice leading to memory corruption. It also switches the spin_lock call to use the non-irqsave version since the xfer->lock is already held and irqs already disabled. Signed-off-by: Thomas Pugliese <thomas.pugliese@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-03-01usb: wusbcore: fix compile warningsThomas Pugliese2-7/+3
Fix "pointer targets differ in signedness" and "variable set but not used" warnings Signed-off-by: Thomas Pugliese <thomas.pugliese@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-03-01usb: wusbcore: add info to HWA debug printsThomas Pugliese1-9/+16
This patch adds a debug print in the transfer dequeue case where a transfer result arrives for a transfer that has already been cleaned up. It also adds the transfer ID to some debug prints and prints error codes as signed integers in a couple of others. Signed-off-by: Thomas Pugliese <thomas.pugliese@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-03-01usb: wusbcore: read actual_length bytes isoc in segmentsThomas Pugliese1-1/+1
Use the iso_frame_desc.actual_length field instead of length when reading isoc in data segments from the HWA. This fixes a case where the isoc in read URB would never complete because it expected the HWA to send more data than it actually did. When this happened the URB would be stuck in the driver preventing module unload and clean shutdown. Signed-off-by: Thomas Pugliese <thomas.pugliese@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-03-01usb: wusbcore: adjust iterator correctly when searching for ep comp descriptorThomas Pugliese1-1/+1
If the endpoint companion descriptor is not the first descriptor in the extra descriptor buffer of a usb_host_endpoint, the loop in rpipe_epc_find will get its buffer pointer and remaining size values out of sync. The buffer ptr 'itr' is advanced by the descriptor's bLength field but the remaining size value 'itr_size' is decremented by the bDescriptorType field which is incorrect. This patch fixes the loop to decrement itr_size by bLength as it should. Signed-off-by: Thomas Pugliese <thomas.pugliese@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-03-01usb: wusbcore: add a convenience function for completing a transfer segmentThomas Pugliese1-21/+27
This patch adds a convenience function for the commonly performed task of marking a transfer segment as done. It combines the 3 steps of setting the segment status, incrementing the segs_done field of the transfer and checking if the completed segment results in the transfer also being done. Signed-off-by: Thomas Pugliese <thomas.pugliese@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-03-01usb: wusbcore: prevent urb dequeue and giveback raceThomas Pugliese1-10/+27
This patch takes a reference to the wa_xfer object in wa_urb_dequeue to prevent the urb giveback code from completing the xfer and freeing it while wa_urb_dequeue is executing. It also checks for done at the start to avoid a double completion scenario. Adding the check for done in urb_dequeue means that any other place where a submitted transfer segment is marked as done must complete the transfer if it is done. __wa_xfer_delayed_run was not checking this case so that check was added as well. Signed-off-by: Thomas Pugliese <thomas.pugliese@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-03-01usb: wusbcore: fix stranded URB after HWA unplugThomas Pugliese1-5/+51
This patch adds error checking to the abort request callback to forcibly clean up the dequeued transfers if the abort request failed. The wa_complete_remaining_xfer_segs was modified so that it could be used in this situation as well. This fixes a stranded URB/PNP hang when the HWA is unplugged while playing audio to a wireless audio device. Signed-off-by: Thomas Pugliese <thomas.pugliese@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-03-01usb: wusbcore: fix kernel panic on HWA unplugThomas Pugliese1-4/+44
This patch adds ref counting to sections of code that operate on struct wa_xfer objects that were missing it. Specifically, error handling cases need to be protected from freeing the xfer while it is still in use elsewhere. This fixes a kernel panic that can occur when pulling the HWA dongle while data is being transferred to a wireless device. Signed-off-by: Thomas Pugliese <thomas.pugliese@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-01-09usb: delete non-required instances of include <linux/init.h>Paul Gortmaker2-2/+0
None of these files are actually using any __init type directives and hence don't need to include <linux/init.h>. Most are just a left over from __devinit and __cpuinit removal, or simply due to code getting copied from one driver to the next. Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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