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* USB: usb_wwan: make resume error messages uniformJohan Hovold2014-05-271-2/+3
| | | | | | | Make resume error messages uniform. Signed-off-by: Johan Hovold <jhovold@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* USB: usb_wwan: kill interrupt urb explicitly at suspendJohan Hovold2014-05-271-2/+3
| | | | | | | | | As the port interrupt URB is submitted by the subdriver at open, we should also kill it explicitly at suspend (even though this will be taken care of by USB serial core otherwise). Signed-off-by: Johan Hovold <jhovold@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* USB: usb_wwan: remove redundant urb kill from port removeJohan Hovold2014-05-271-4/+1
| | | | | | | | Remove redundant usb_kill_urb from port remove, which is called post-shutdown (close). Signed-off-by: Johan Hovold <jhovold@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* USB: usb_wwan: remove unimplemented set_termiosJohan Hovold2014-05-273-18/+0
| | | | | | | | | | | The driver does not implement set_termios so the operation can be left unset (tty will do the tty_termios_copy_hw for us). Note that the send_setup call is bogus as it really only sets DTR/RTS to their current values. Signed-off-by: Johan Hovold <jhovold@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* USB: usb_wwan: remove redundant modem-control requestJohan Hovold2014-05-271-3/+0
| | | | | | | | The tty-port implementation has already made sure that DTR/RTS have been raised by calling dtr_rts so remove the redundant call from open. Signed-off-by: Johan Hovold <jhovold@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* USB: usb_wwan: fix remote wakeupJohan Hovold2014-05-272-2/+5
| | | | | | | | | | | | | | | | | | | Make sure that needs_remote_wake up is always set when there are open ports. Currently close() would unconditionally set needs_remote_wakeup to 0 even though there might still be open ports. This could lead to blocked input and possibly dropped data on devices that do not support remote wakeup (and which must therefore not be runtime suspended while open). Add an open_ports counter (protected by the susp_lock) and only clear needs_remote_wakeup when the last port is closed. Note that there are currently no multi-port drivers using the usb_wwan implementation. Signed-off-by: Johan Hovold <jhovold@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* USB: usb_wwan: fix discarded writes on resume errorsJohan Hovold2014-05-271-11/+16
| | | | | | | | There's no reason not to try sending off any further delayed write urbs, should one urb-submission fail. Signed-off-by: Johan Hovold <jhovold@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* USB: usb_wwan: fix potential blocked I/O after resumeJohan Hovold2014-05-271-8/+17
| | | | | | | | | | | | | | | | | | | | | | | | Keep trying to submit urbs rather than bail out on first read-urb submission error, which would also prevent I/O for any further ports from being resumed. Instead keep an error count, for all types of failed submissions, and let USB core know that something went wrong. Also make sure to always clear the suspended flag. Currently a failed read-urb submission would prevent cached writes as well as any subsequent writes from being submitted until next suspend-resume cycle, something which may not even necessarily happen. Note that USB core currently only logs an error if an interface resume failed. Fixes: 383cedc3bb43 ("USB: serial: full autosuspend support for the option driver") Cc: <stable@vger.kernel.org> # v2.6.32 Signed-off-by: Johan Hovold <jhovold@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* USB: usb_wwan: fix potential NULL-deref at resumeJohan Hovold2014-05-271-24/+19
| | | | | | | | | | | | | | | | The interrupt urb was submitted unconditionally at resume, something which could lead to a NULL-pointer dereference in the urb completion handler as resume may be called after the port and port data is gone. Fix this by making sure the interrupt urb is only submitted and active when the port is open. Fixes: 383cedc3bb43 ("USB: serial: full autosuspend support for the option driver") Cc: <stable@vger.kernel.org> # v2.6.32: 032129cb03df Signed-off-by: Johan Hovold <jhovold@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* USB: usb_wwan: fix urb leak at shutdownJohan Hovold2014-05-271-12/+22
| | | | | | | | | | | | | | | | | | | | The delayed-write queue was never emptied at shutdown (close), something which could lead to leaked urbs if the port is closed before being runtime resumed due to a write. When this happens the output buffer would not drain on close (closing_wait timeout), and after consecutive opens, writes could be corrupted with previously buffered data, transfered with reduced throughput or completely blocked. Note that unbusy_queued_urb() was simply moved out of CONFIG_PM. Fixes: 383cedc3bb43 ("USB: serial: full autosuspend support for the option driver") Cc: <stable@vger.kernel.org> # v2.6.32 Signed-off-by: Johan Hovold <jhovold@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* USB: usb_wwan: fix write and suspend raceJohan Hovold2014-05-271-8/+5
| | | | | | | | | | | | | | | | | Fix race between write() and suspend() which could lead to writes being dropped (or I/O while suspended) if the device is runtime suspended while a write request is being processed. Specifically, suspend() releases the susp_lock after determining the device is idle but before setting the suspended flag, thus leaving a window where a concurrent write() can submit an urb. Fixes: 383cedc3bb43 ("USB: serial: full autosuspend support for the option driver") Cc: <stable@vger.kernel.org> # v2.6.32 Signed-off-by: Johan Hovold <jhovold@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* USB: usb_wwan: fix race between write and resumexiao jin2014-05-271-6/+2
| | | | | | | | | | | | | | | | | | | | | | | We find a race between write and resume. usb_wwan_resume run play_delayed() and spin_unlock, but intfdata->suspended still is not set to zero. At this time usb_wwan_write is called and anchor the urb to delay list. Then resume keep running but the delayed urb have no chance to be commit until next resume. If the time of next resume is far away, tty will be blocked in tty_wait_until_sent during time. The race also can lead to writes being reordered. This patch put play_Delayed and intfdata->suspended together in the spinlock, it's to avoid the write race during resume. Fixes: 383cedc3bb43 ("USB: serial: full autosuspend support for the option driver") Signed-off-by: xiao jin <jin.xiao@intel.com> Signed-off-by: Zhang, Qi1 <qi1.zhang@intel.com> Reviewed-by: David Cohen <david.a.cohen@linux.intel.com> Cc: <stable@vger.kernel.org> # v2.6.32 Signed-off-by: Johan Hovold <jhovold@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* USB: usb_wwan: fix urb leak in write error pathxiao jin2014-05-271-1/+3
| | | | | | | | | | | | | | | | | | | | | | | | When enable usb serial for modem data, sometimes the tty is blocked in tty_wait_until_sent because portdata->out_busy always is set and have no chance to be cleared. We find a bug in write error path. usb_wwan_write set portdata->out_busy firstly, then try autopm async with error. No out urb submit and no usb_wwan_outdat_callback to this write, portdata->out_busy can't be cleared. This patch clear portdata->out_busy if usb_wwan_write try autopm async with error. Fixes: 383cedc3bb43 ("USB: serial: full autosuspend support for the option driver") Signed-off-by: xiao jin <jin.xiao@intel.com> Signed-off-by: Zhang, Qi1 <qi1.zhang@intel.com> Reviewed-by: David Cohen <david.a.cohen@linux.intel.com> Cc: <stable@vger.kernel.org> # v2.6.32 Signed-off-by: Johan Hovold <jhovold@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* USB: option: add missing usb_mark_last_busyJohan Hovold2014-05-271-0/+1
| | | | | | | | We should call usb_mark_last_busy in all input paths, including the interrupt completion handler. Signed-off-by: Johan Hovold <jhovold@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* USB: option: fix line-control pipe directionJohan Hovold2014-05-271-1/+1
| | | | | | | | The option line-control request has been using the wrong pipe direction, while relying on USB core to fix it up. Signed-off-by: Johan Hovold <jhovold@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* USB: option: fix runtime PM handlingJohan Hovold2014-05-271-1/+10
| | | | | | | | | | | | Fix potential I/O while runtime suspended due to missing PM operations in send_setup. Fixes: 383cedc3bb43 ("USB: serial: full autosuspend support for the option driver") Cc: <stable@vger.kernel.org> # v2.6.32 Signed-off-by: Johan Hovold <jhovold@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* USB: sierra: do not resume I/O on closing portsJohan Hovold2014-05-271-6/+5
| | | | | | | | | | | | Use tty-port initialised flag rather than private flag to determine when port is closing down. Since the tty-port flag is set prior to dropping DTR/RTS (when HUPCL is set) this avoid submitting the read urbs when resuming the interface in dtr_rts() only to immediately kill them again in shutdown(). Signed-off-by: Johan Hovold <jhovold@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* USB: sierra: minimise no-suspend window during closeJohan Hovold2014-05-271-2/+2
| | | | | | | | | Move usb_autopm_get_interface_no_resume to the end of close(). This makes the window during which suspend is prevented before the final put in USB serial core slightly smaller. Signed-off-by: Johan Hovold <jhovold@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* USB: sierra: refactor delayed-urb submissionJohan Hovold2014-05-271-20/+43
| | | | | | | Refactor and clean up delayed-urb submission at resume. Signed-off-by: Johan Hovold <jhovold@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* USB: sierra: clean up suspendJohan Hovold2014-05-271-10/+6
| | | | | | | | | Clean up suspend() somewhat and make sure to always set the suspended flag (although it's only used for runtime PM) in order to match resume(). Signed-off-by: Johan Hovold <jhovold@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* USB: sierra: use interface-data accessorsJohan Hovold2014-05-271-6/+6
| | | | | | | | Use usb_get_serial_data() rather than accessing the private pointer directly. Signed-off-by: Johan Hovold <jhovold@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* USB: sierra: remove redundant modem-control requestsJohan Hovold2014-05-271-15/+1
| | | | | | | | | The tty-port implementation has already made sure that DTR/RTS have been raised and lowered by calling dtr_rts so remove the redundant calls from open and close. Signed-off-by: Johan Hovold <jhovold@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* USB: sierra: do not resume I/O on closed portsJohan Hovold2014-05-271-6/+4
| | | | | | | | | | | | Do not resume any I/O, including the delayed write queue, on closed ports. Note that this currently has no functional impact due to the usb_autopm_get_interface() in close(), but that call is about to be removed by a follow-up patch. Signed-off-by: Johan Hovold <jhovold@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* USB: sierra: remove disconnected test from closeJohan Hovold2014-05-271-9/+5
| | | | | | | | | Remove no longer needed disconnected test from close, which is never called post disconnect (and drivers must handle failed I/O during disconnect anyway). Signed-off-by: Johan Hovold <jhovold@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* USB: sierra: remove unimplemented set_termiosJohan Hovold2014-05-271-8/+0
| | | | | | | | | | | The driver does not implement set_termios so the operation can be left unset (tty will do the tty_termios_copy_hw for us). Note that the send_setup call is bogus as it really only sets DTR/RTS to their current values. Signed-off-by: Johan Hovold <jhovold@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* USB: sierra: remove unused variableJohan Hovold2014-05-271-2/+0
| | | | | | | Remove unused variable from sierra_release_urb. Signed-off-by: Johan Hovold <jhovold@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* USB: sierra: remove bogus endpoint testJohan Hovold2014-05-271-3/+0
| | | | | | | Remove bogus endpoint-address test which is never true. Signed-off-by: Johan Hovold <jhovold@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* USB: sierra: fix line-control pipe directionJohan Hovold2014-05-271-1/+1
| | | | | | | | The sierra line-control request has been using the wrong pipe direction, while relying on USB core to fix it up. Signed-off-by: Johan Hovold <jhovold@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* USB: sierra: fix resume error reportingJohan Hovold2014-05-271-0/+4
| | | | | | | | Add error message to resume error path and make sure to also return an error when failing to submit a cached write. Signed-off-by: Johan Hovold <jhovold@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* USB: sierra: fix urbs not being killed on shutdownJohan Hovold2014-05-271-0/+2
| | | | | | | Make sure to stop all I/O, including any active write urbs, at shutdown. Signed-off-by: Johan Hovold <jhovold@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* USB: sierra: fix characters being dropped at closeJohan Hovold2014-05-271-0/+18
| | | | | | | | | | | | Fix characters potentially being dropped at close due to missing chars_in_buffer implementation. Note that currently the write urbs are not even killed at close (will be fixed separately), but this could still lead to dropped data since we have lowered DTR/RTS. Signed-off-by: Johan Hovold <jhovold@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* USB: sierra: fix remote wakeupJohan Hovold2014-05-271-2/+5
| | | | | | | | | | | | | | | | | | | | Make sure that needs_remote_wake up is always set when there are open ports. Currently close() would unconditionally set needs_remote_wakeup to 0 even though there might still be open ports. This could lead to blocked input and possibly dropped data on devices that do not support remote wakeup (and which must therefore not be runtime suspended while open). Add an open_ports counter (protected by the susp_lock) and only clear needs_remote_wakeup when the last port is closed. Fixes: e6929a9020ac ("USB: support for autosuspend in sierra while online") Cc: <stable@vger.kernel.org> # v2.6.32 Signed-off-by: Johan Hovold <jhovold@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* USB: sierra: fix urb and memory leak on disconnectJohan Hovold2014-05-271-0/+13
| | | | | | | | | | | | | The delayed-write queue was never emptied on disconnect, something which would lead to leaked urbs and transfer buffers if the device is disconnected before being runtime resumed due to a write. Fixes: e6929a9020ac ("USB: support for autosuspend in sierra while online") Cc: <stable@vger.kernel.org> # v2.6.32 Signed-off-by: Johan Hovold <jhovold@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* USB: sierra: fix urb and memory leak in resume error pathJohan Hovold2014-05-271-2/+6
| | | | | | | | | | | | | | | | | | | | | | Neither the transfer buffer or the urb itself were released in the resume error path for delayed writes. Also on errors, the remainder of the queue was not even processed, which leads to further urb and buffer leaks. The same error path also failed to balance the outstanding-urb counter, something which results in degraded throughput or completely blocked writes. Fix this by releasing urb and buffer and balancing counters on errors, and by always processing the whole queue even when submission of one urb fails. Fixes: e6929a9020ac ("USB: support for autosuspend in sierra while online") Cc: <stable@vger.kernel.org> # v2.6.32 Signed-off-by: Johan Hovold <jhovold@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* USB: sierra: fix use after free at suspend/resumeJohan Hovold2014-05-271-0/+6
| | | | | | | | | | | | | | | | Fix use after free or NULL-pointer dereference during suspend and resume. The port data may never have been allocated (port probe failed) or may already have been released by port_remove (e.g. driver is unloaded) when suspend and resume are called. Fixes: e6929a9020ac ("USB: support for autosuspend in sierra while online") Cc: <stable@vger.kernel.org> # v2.6.32 Signed-off-by: Johan Hovold <jhovold@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* USB: sierra: fix AA deadlock in open error pathJohan Hovold2014-05-271-8/+13
| | | | | | | | | | | Fix AA deadlock in open error path that would call close() and try to grab the already held disc_mutex. Fixes: b9a44bc19f48 ("sierra: driver urb handling improvements") Cc: <stable@vger.kernel.org> # v2.6.31 Signed-off-by: Johan Hovold <jhovold@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* USB: iowarrior: Convert local dbg macro to dev_dbgJoe Perches2014-05-271-21/+17
| | | | | | | | | | | | Use a more standard logging style. Add terminating newlines to formats. Remove __func__ as that can be added via dynamic debug. Remove now unnecessary debug module parameter. Remove the dbg macro too. Signed-off-by: Joe Perches <joe@perches.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* USB: appledisplay: Convert /n to \nJoe Perches2014-05-271-1/+1
| | | | | | | Use a newline character appropriately. Signed-off-by: Joe Perches <joe@perches.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* usb: qcserial: remove interface number matchingBjørn Mork2014-05-271-7/+0
| | | | | | | | | | | | | Matching on interface numbers was not such a good idea for multi-function serial devices after all. It is much better do create well defined device layouts, allowing a single match entry per device. Remove this now unused code. Signed-off-by: Bjørn Mork <bjorn@mork.no> Signed-off-by: Johan Hovold <jhovold@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* usb: qcserial: define and use Sierra Wireless layoutBjørn Mork2014-05-271-45/+53
| | | | | | | | | | | | | | | | All the "non Gobi" Qualcomm based devices handled by this driver share a common standard Sierra Wireless specific layout. Adding code specifically for this layout allow us to reduce the number of match entries per device from three to one. This change will result in a penalty wrt stable backports, but simplifies new Sierra device addtitions in the long term. Signed-off-by: Bjørn Mork <bjorn@mork.no> Signed-off-by: Johan Hovold <jhovold@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* usb: qcserial: refactor device layout selectionBjørn Mork2014-05-271-6/+16
| | | | | | | | | | Preparing for more supported standard device layouts. Keeping the matching macros unchanged to avoid breaking stable backporting of new device additions. Signed-off-by: Bjørn Mork <bjorn@mork.no> Signed-off-by: Johan Hovold <jhovold@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* usb: qcserial: fix multiline comment coding styleBjørn Mork2014-05-271-3/+6
| | | | | | | | Use a consistent style for all multiline comments. Signed-off-by: Bjørn Mork <bjorn@mork.no> Signed-off-by: Johan Hovold <jhovold@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* uwb: add error messages when reservation establish failsThomas Pugliese2014-05-272-3/+15
| | | | | | | | Add better error messages during the channel change/reservation establish process. Signed-off-by: Thomas Pugliese <thomas.pugliese@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* uwb: fix channel change failureThomas Pugliese2014-05-271-1/+6
| | | | | | | | | | | | | | Make the transition to the UWB_RSV_STATE_NONE state synchronous so that there is not a race between uwb_rsv_terminate and uwb_rsv_establish. uwb_rsv_terminate would set the rsv->state to UWB_RSV_STATE_NONE but did not release the stream resource until a 320ms timeout had expired. If a user called uwb_rsv_establish during that time, it could fail to establish the reservation because no stream resources were available. This patch removes the timer from the uwb_rsv_terminate process since it is not needed when transitioning to UWB_RSV_STATE_NONE. Signed-off-by: Thomas Pugliese <thomas.pugliese@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* usb: host: ohci-exynos: Use devm_ioremap_resource instead of devm_ioremapVivek Gautam2014-05-271-4/+3
| | | | | | | | | | | | Using devm_ioremap_resource() API should actually be preferred over devm_ioremap(), since the former request the mem region first and then gives back the ioremap'ed memory pointer. devm_ioremap_resource() calls request_mem_region(), therby preventing other drivers to make any overlapping call to the same region. Signed-off-by: Vivek Gautam <gautam.vivek@samsung.com> Acked-by: Alan Stern <stern@rowland.harvard.edu> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* usb: host: ehci-tegra: Use devm_ioremap_resource instead of devm_ioremapVivek Gautam2014-05-271-4/+3
| | | | | | | | | | | | Using devm_ioremap_resource() API should actually be preferred over devm_ioremap(), since the former request the mem region first and then gives back the ioremap'ed memory pointer. devm_ioremap_resource() calls request_mem_region(), therby preventing other drivers to make any overlapping call to the same region. Signed-off-by: Vivek Gautam <gautam.vivek@samsung.com> Acked-by: Alan Stern <stern@rowland.harvard.edu> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* usb: host: ehci-spear: Use devm_ioremap_resource instead of devm_ioremapVivek Gautam2014-05-271-10/+3
| | | | | | | | | | | | Using devm_ioremap_resource() API should actually be preferred over devm_ioremap(), since the former request the mem region first and then gives back the ioremap'ed memory pointer. devm_ioremap_resource() calls request_mem_region(), therby preventing other drivers to make any overlapping call to the same region. Signed-off-by: Vivek Gautam <gautam.vivek@samsung.com> Acked-by: Alan Stern <stern@rowland.harvard.edu> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* usb: host: ehci-mv: Use devm_ioremap_resource instead of devm_ioremapVivek Gautam2014-05-271-10/+6
| | | | | | | | | | | | Using devm_ioremap_resource() API should actually be preferred over devm_ioremap(), since the former request the mem region first and then gives back the ioremap'ed memory pointer. devm_ioremap_resource() calls request_mem_region(), therby preventing other drivers to make any overlapping call to the same region. Signed-off-by: Vivek Gautam <gautam.vivek@samsung.com> Acked-by: Alan Stern <stern@rowland.harvard.edu> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* usb: host: ehci-msm: Use devm_ioremap_resource instead of devm_ioremapVivek Gautam2014-05-271-4/+3
| | | | | | | | | | | | Using devm_ioremap_resource() API should actually be preferred over devm_ioremap(), since the former request the mem region first and then gives back the ioremap'ed memory pointer. devm_ioremap_resource() calls request_mem_region(), therby preventing other drivers to make any overlapping call to the same region. Signed-off-by: Vivek Gautam <gautam.vivek@samsung.com> Acked-by: Alan Stern <stern@rowland.harvard.edu> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* usb: host: ehci-exynos: Use devm_ioremap_resource instead of devm_ioremapVivek Gautam2014-05-271-4/+3
| | | | | | | | | | | | Using devm_ioremap_resource() API should actually be preferred over devm_ioremap(), since the former request the mem region first and then gives back the ioremap'ed memory pointer. devm_ioremap_resource() calls request_mem_region(), therby preventing other drivers to make any overlapping call to the same region. Signed-off-by: Vivek Gautam <gautam.vivek@samsung.com> Acked-by: Alan Stern <stern@rowland.harvard.edu> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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