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path: root/drivers/usb/gadget/function/f_tcm.c
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2017-11-14Merge tag 'configfs-for-4.15' of git://git.infradead.org/users/hch/configfsLinus Torvalds
Pull configfs updates from Christoph Hellwig: "A couple of configfs cleanups: - proper use of the bool type (Thomas Meyer) - constification of struct config_item_type (Bhumika Goyal)" * tag 'configfs-for-4.15' of git://git.infradead.org/users/hch/configfs: RDMA/cma: make config_item_type const stm class: make config_item_type const ACPI: configfs: make config_item_type const nvmet: make config_item_type const usb: gadget: configfs: make config_item_type const PCI: endpoint: make config_item_type const iio: make function argument and some structures const usb: gadget: make config_item_type structures const dlm: make config_item_type const netconsole: make config_item_type const nullb: make config_item_type const ocfs2/cluster: make config_item_type const target: make config_item_type const configfs: make ci_type field, some pointers and function arguments const configfs: make config_item_type const configfs: Fix bool initialization/comparison
2017-11-07USB: gadget: function: Remove redundant license textGreg Kroah-Hartman
Now that the SPDX tag is in all USB files, that identifies the license in a specific and legally-defined manner. So the extra GPL text wording can be removed as it is no longer needed at all. This is done on a quest to remove the 700+ different ways that files in the kernel describe the GPL license text. And there's unneeded stuff like the address (sometimes incorrect) for the FSF which is never needed. No copyright headers or other non-license-description text was removed. Cc: Oliver Neukum <oneukum@suse.com> Cc: Johan Hovold <johan@kernel.org> Cc: Jerry Zhang <zhangjerry@google.com> Cc: John Keeping <john@metanate.com> Cc: Krzysztof Opasiak <k.opasiak@samsung.com> Cc: Abdulhadi Mohamed <abdulahhadi2@gmail.com> Cc: Matthew Wilcox <willy@linux.intel.com> Cc: Janusz Dziedzic <januszx.dziedzic@linux.intel.com> Acked-by: Felipe Balbi <felipe.balbi@linux.intel.com> Acked-by: Michal Nazarewicz <mina86@mina86.com> Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Acked-by: Vincent Pelletier <plr.vincent@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-11-04USB: add SPDX identifiers to all remaining files in drivers/usb/Greg Kroah-Hartman
It's good to have SPDX identifiers in all files to make it easier to audit the kernel tree for correct licenses. Update the drivers/usb/ and include/linux/usb* files with the correct SPDX license identifier based on the license text in the file itself. The SPDX identifier is a legally binding shorthand, which can be used instead of the full boiler plate text. This work is based on a script and data from Thomas Gleixner, Philippe Ombredanne, and Kate Stewart. Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Kate Stewart <kstewart@linuxfoundation.org> Cc: Philippe Ombredanne <pombredanne@nexb.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Acked-by: Felipe Balbi <felipe.balbi@linux.intel.com> Acked-by: Johan Hovold <johan@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-10-24usb: gadget: f_tcm: mark expected switch fall-throughGustavo A. R. Silva
In preparation to enabling -Wimplicit-fallthrough, mark switch cases where we are expecting to fall through. Addresses-Coverity-ID: 703128 Signed-off-by: Gustavo A. R. Silva <garsilva@embeddedor.com> Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
2017-10-19usb: gadget: make config_item_type structures constBhumika Goyal
Make these structures const as they are only passed to the const argument of the functions config_{group/item}_init_type_name. Signed-off-by: Bhumika Goyal <bhumirks@gmail.com> Acked-by: Felipe Balbi <felipe.balbi@linux.intel.com> Signed-off-by: Christoph Hellwig <hch@lst.de>
2017-03-30usb: gadget: Correct usb EP argument for BOT status requestManish Narani
This patch corrects the argument in usb_ep_free_request as it is mistakenly set to ep_out. It should be ep_in for status request. Signed-off-by: Manish Narani <mnarani@xilinx.com> Acked-by: Felipe Balbi <felipe.balbi@linux.intel.com> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2016-12-09usb: gadget: Fix second argument of percpu_ida_alloc()Bart Van Assche
Pass a task state as second argument to percpu_ida_alloc(). Fixes: commit 71e7ae8e1fb2 ("usb-gadget/tcm: Conversion to percpu_ida tag pre-allocation") Signed-off-by: Bart Van Assche <bart.vanassche@sandisk.com> Cc: Nicholas Bellinger <nab@linux-iscsi.org> Cc: Andrzej Pietrasiewicz <andrzej.p@samsung.com> Cc: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Cc: Felipe Balbi <felipe.balbi@linux.intel.com>
2016-05-31usb: gadget: f_tcm: out of bound access in usbg_drop_tpgHeinrich Schuchardt
Commit dc8c46a5ae77 ("usb: gadget: f_tcm: convert to new function interface with backward compatibility") introduced a possible out of bounds memory access: If tpg is not found in function usbg_drop_tpg, tpg_instances[TPG_INSTANCES] is accessed. Fixes: dc8c46a5ae77 ("usb: gadget: f_tcm: convert to new function interface with backward compatibility") Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de> Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
2016-05-10target: make close_session optionalChristoph Hellwig
Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2016-05-10target: make ->shutdown_session optionalChristoph Hellwig
Turns out the template and thus many drivers got the return value wrong: 0 means the fabrics driver needs to put a session reference, which no driver except for the iSCSI target drivers did. Fortunately none of these drivers supports explicit Node ACLs, so the bug was harmless. Even without that only qla2xxx and iscsi every did real work in shutdown_session, so get rid of the boilerplate code in all other drivers. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2016-03-22Merge branch 'for-next' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending Pull SCSI target updates from Nicholas Bellinger: "The highlights this round include: - Add target_alloc_session() w/ callback helper for doing se_session allocation + tag + se_node_acl lookup. (HCH + nab) - Tree-wide fabric driver conversion to use target_alloc_session() - Convert sbp-target to use percpu_ida tag pre-allocation, and TARGET_SCF_ACK_KREF I/O krefs (Chris Boot + nab) - Convert usb-gadget to use percpu_ida tag pre-allocation, and TARGET_SCF_ACK_KREF I/O krefs (Andrzej Pietrasiewicz + nab) - Convert xen-scsiback to use percpu_ida tag pre-allocation, and TARGET_SCF_ACK_KREF I/O krefs (Juergen Gross + nab) - Convert tcm_fc to use TARGET_SCF_ACK_KREF I/O + TMR krefs - Convert ib_srpt to use percpu_ida tag pre-allocation - Add DebugFS node for qla2xxx target sess list (Quinn) - Rework iser-target connection termination (Jenny + Sagi) - Convert iser-target to new CQ API (HCH) - Add pass-through WRITE_SAME support for IBLOCK (Mike Christie) - Introduce data_bitmap for asynchronous access of data area (Sheng Yang + Andy) - Fix target_release_cmd_kref shutdown comp leak (Himanshu Madhani) Also, there is a separate PULL request coming for cxgb4 NIC driver prerequisites for supporting hw iscsi segmentation offload (ISO), that will be the base for a number of v4.7 developments involving iscsi-target hw offloads" * 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending: (36 commits) target: Fix target_release_cmd_kref shutdown comp leak target: Avoid DataIN transfers for non-GOOD SAM status target/user: Report capability of handling out-of-order completions to userspace target/user: Fix size_t format-spec build warning target/user: Don't free expired command when time out target/user: Introduce data_bitmap, replace data_length/data_head/data_tail target/user: Free data ring in unified function target/user: Use iovec[] to describe continuous area target: Remove enum transport_lunflags_table target/iblock: pass WRITE_SAME to device if possible iser-target: Kill the ->isert_cmd back pointer in struct iser_tx_desc iser-target: Kill struct isert_rdma_wr iser-target: Convert to new CQ API iser-target: Split and properly type the login buffer iser-target: Remove ISER_RECV_DATA_SEG_LEN iser-target: Remove impossible condition from isert_wait_conn iser-target: Remove redundant wait in release_conn iser-target: Rework connection termination iser-target: Separate flows for np listeners and connections cma events iser-target: Add new state ISER_CONN_BOUND to isert_conn ...
2016-03-10usb-gadget/tcm: Convert to TARGET_SCF_ACK_KREF I/O krefsNicholas Bellinger
This patch drops struct usbg_cmd->kref internal kref-erence usage, for proper TARGET_SCF_ACK_KREF conversion. Tested-by: Andrzej Pietrasiewicz <andrzej.p@samsung.com> Cc: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Cc: Felipe Balbi <felipe.balbi@linux.intel.com> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2016-03-10usb-gadget/tcm: Conversion to percpu_ida tag pre-allocationNicholas Bellinger
This patch converts usb-gadget target to use percpu_ida tag pre-allocation for struct usbg_cmd descriptor, in order to avoid fast-path struct usbg_cmd memory allocations. Note by default this is currently hardcoded to 128. Tested-by: Andrzej Pietrasiewicz <andrzej.p@samsung.com> Cc: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Cc: Felipe Balbi <felipe.balbi@linux.intel.com> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2016-03-10target: Convert demo-mode only drivers to target_alloc_sessionChristoph Hellwig
This patch converts existing loopback, usb-gadget, and xen-scsiback demo-mode only fabric drivers to use the new target_alloc_session API caller. This includes adding a new alloc_session callback for fabric driver internal nexus pointer assignments. (Fixes for early for-next nexus breakage - Dan Carpenter) Cc: Christoph Hellwig <hch@lst.de> Cc: Hannes Reinecke <hare@suse.de> Acked-by: Juergen Gross <jgross@suse.com> Tested-by: Andrzej Pietrasiewicz <andrzej.p@samsung.com> Tested-by: Chris Boot <bootc@bootc.net> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2016-03-04usb: gadget: Update usb_assign_descriptors for SuperSpeedPlusJohn Youn
Add the 'ssp_descriptors' parameter to the usb_assign_descriptors() function. This allows a function driver to add descriptors for SuperSpeedPlus speeds if it supports it. Also update all uses of this function in the gadget subsystem so that they pass NULL for the ssp_descriptors parameters. Signed-off-by: John Youn <johnyoun@synopsys.com> Signed-off-by: Felipe Balbi <balbi@kernel.org>
2016-01-07usb/gadget: Remove set-but-not-used variablesBart Van Assche
Avoid that building with W=1 triggers compiler warnings about set-but-not-used variables. Signed-off-by: Bart Van Assche <bart.vanassche@sandisk.com> Cc: Felipe Balbi <balbi@ti.com> Cc: Andy Grover <agrover@redhat.com> Cc: Christoph Hellwig <hch@lst.de> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2015-12-20usb: gadget: f_tcm: add configfs supportAndrzej Pietrasiewicz
Allow using the tcm function as a component of a gadget composed with ConfigFS. Signed-off-by: Andrzej Pietrasiewicz <andrzej.p@samsung.com> Acked-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2015-12-20usb: gadget: f_tcm: use usb_gstrings_attachAndrzej Pietrasiewicz
Do not directly use file static strings definitions in instances of f_tcm. Instead use usb_gstrings_attach. Signed-off-by: Andrzej Pietrasiewicz <andrzej.p@samsung.com> Acked-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2015-12-20usb: gadget: f_tcm: remove redundant singletonAndrzej Pietrasiewicz
The only instance is guaranteed with TPG_INSTANCES defined to 1. Signed-off-by: Andrzej Pietrasiewicz <andrzej.p@samsung.com> Acked-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2015-12-20usb: gadget: f_tcm: remove compatibility layerAndrzej Pietrasiewicz
There are no old function interface users left. Signed-off-by: Andrzej Pietrasiewicz <andrzej.p@samsung.com> Acked-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2015-12-20usb: gadget: f_tcm: convert to new function interface with backward ↵Andrzej Pietrasiewicz
compatibility Converting tcm to the new function interface requires converting USB tcm's function code and its users. This patch converts the f_tcm.c to the new function interface. The file can be now compiled into a separate module usb_f_tcm.ko. The old function interface is provided by means of preprocessor conditional directives. After all users are converted, the old interface can be removed. Signed-off-by: Andrzej Pietrasiewicz <andrzej.p@samsung.com> Acked-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2015-12-20usb: gadget: tcm: factor out f_tcmAndrzej Pietrasiewicz
Prepare for converting tcm to new function registration interface. Signed-off-by: Andrzej Pietrasiewicz <andrzej.p@samsung.com> Acked-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>