| Message ID | 1643857054-112415-2-git-send-email-dh10.jung@samsung.com (mailing list archive) |
|---|---|
| State | Superseded |
| Headers | show |
| Series | support USB offload feature | expand |
Hi Daehwan,
Thank you for the patch! Perhaps something to improve:
[auto build test WARNING on usb/usb-testing]
[also build test WARNING on char-misc/char-misc-testing v5.17-rc2 next-20220202]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch]
url: https://github.com/0day-ci/linux/commits/Daehwan-Jung/usb-host-export-symbols-for-xhci-hooks-usage/20220203-115745
base: https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing
config: alpha-allyesconfig (https://download.01.org/0day-ci/archive/20220203/202202031306.bIBPQVIv-lkp@intel.com/config)
compiler: alpha-linux-gcc (GCC) 11.2.0
reproduce (this is a W=1 build):
wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
chmod +x ~/bin/make.cross
# https://github.com/0day-ci/linux/commit/7bbb0fd19fb35f4629e27fd5ad0e4c787a4410b7
git remote add linux-review https://github.com/0day-ci/linux
git fetch --no-tags linux-review Daehwan-Jung/usb-host-export-symbols-for-xhci-hooks-usage/20220203-115745
git checkout 7bbb0fd19fb35f4629e27fd5ad0e4c787a4410b7
# save the config file to linux build tree
mkdir build_dir
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross O=build_dir ARCH=alpha SHELL=/bin/bash drivers/usb/host/
If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>
All warnings (new ones prefixed by >>):
drivers/usb/host/xhci-mem.c:68:6: warning: no previous prototype for 'xhci_segment_free' [-Wmissing-prototypes]
68 | void xhci_segment_free(struct xhci_hcd *xhci, struct xhci_segment *seg)
| ^~~~~~~~~~~~~~~~~
drivers/usb/host/xhci-mem.c:79:6: warning: no previous prototype for 'xhci_free_segments_for_ring' [-Wmissing-prototypes]
79 | void xhci_free_segments_for_ring(struct xhci_hcd *xhci,
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/usb/host/xhci-mem.c:100:6: warning: no previous prototype for 'xhci_link_segments' [-Wmissing-prototypes]
100 | void xhci_link_segments(struct xhci_segment *prev,
| ^~~~~~~~~~~~~~~~~~
>> drivers/usb/host/xhci-mem.c:211:6: warning: no previous prototype for 'xhci_remove_segment_mapping' [-Wmissing-prototypes]
211 | void xhci_remove_segment_mapping(struct radix_tree_root *trb_address_map,
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~
>> drivers/usb/host/xhci-mem.c:262:6: warning: no previous prototype for 'xhci_remove_stream_mapping' [-Wmissing-prototypes]
262 | void xhci_remove_stream_mapping(struct xhci_ring *ring)
| ^~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/usb/host/xhci-mem.c:1984:5: warning: no previous prototype for 'xhci_check_trb_in_td_math' [-Wmissing-prototypes]
1984 | int xhci_check_trb_in_td_math(struct xhci_hcd *xhci)
| ^~~~~~~~~~~~~~~~~~~~~~~~~
vim +/xhci_remove_segment_mapping +211 drivers/usb/host/xhci-mem.c
67
> 68 void xhci_segment_free(struct xhci_hcd *xhci, struct xhci_segment *seg)
69 {
70 if (seg->trbs) {
71 dma_pool_free(xhci->segment_pool, seg->trbs, seg->dma);
72 seg->trbs = NULL;
73 }
74 kfree(seg->bounce_buf);
75 kfree(seg);
76 }
77 EXPORT_SYMBOL_GPL(xhci_segment_free);
78
> 79 void xhci_free_segments_for_ring(struct xhci_hcd *xhci,
80 struct xhci_segment *first)
81 {
82 struct xhci_segment *seg;
83
84 seg = first->next;
85 while (seg != first) {
86 struct xhci_segment *next = seg->next;
87 xhci_segment_free(xhci, seg);
88 seg = next;
89 }
90 xhci_segment_free(xhci, first);
91 }
92
93 /*
94 * Make the prev segment point to the next segment.
95 *
96 * Change the last TRB in the prev segment to be a Link TRB which points to the
97 * DMA address of the next segment. The caller needs to set any Link TRB
98 * related flags, such as End TRB, Toggle Cycle, and no snoop.
99 */
100 void xhci_link_segments(struct xhci_segment *prev,
101 struct xhci_segment *next,
102 enum xhci_ring_type type, bool chain_links)
103 {
104 u32 val;
105
106 if (!prev || !next)
107 return;
108 prev->next = next;
109 if (type != TYPE_EVENT) {
110 prev->trbs[TRBS_PER_SEGMENT-1].link.segment_ptr =
111 cpu_to_le64(next->dma);
112
113 /* Set the last TRB in the segment to have a TRB type ID of Link TRB */
114 val = le32_to_cpu(prev->trbs[TRBS_PER_SEGMENT-1].link.control);
115 val &= ~TRB_TYPE_BITMASK;
116 val |= TRB_TYPE(TRB_LINK);
117 if (chain_links)
118 val |= TRB_CHAIN;
119 prev->trbs[TRBS_PER_SEGMENT-1].link.control = cpu_to_le32(val);
120 }
121 }
122 EXPORT_SYMBOL_GPL(xhci_link_segments);
123
124 /*
125 * Link the ring to the new segments.
126 * Set Toggle Cycle for the new ring if needed.
127 */
128 static void xhci_link_rings(struct xhci_hcd *xhci, struct xhci_ring *ring,
129 struct xhci_segment *first, struct xhci_segment *last,
130 unsigned int num_segs)
131 {
132 struct xhci_segment *next;
133 bool chain_links;
134
135 if (!ring || !first || !last)
136 return;
137
138 /* Set chain bit for 0.95 hosts, and for isoc rings on AMD 0.96 host */
139 chain_links = !!(xhci_link_trb_quirk(xhci) ||
140 (ring->type == TYPE_ISOC &&
141 (xhci->quirks & XHCI_AMD_0x96_HOST)));
142
143 next = ring->enq_seg->next;
144 xhci_link_segments(ring->enq_seg, first, ring->type, chain_links);
145 xhci_link_segments(last, next, ring->type, chain_links);
146 ring->num_segs += num_segs;
147 ring->num_trbs_free += (TRBS_PER_SEGMENT - 1) * num_segs;
148
149 if (ring->type != TYPE_EVENT && ring->enq_seg == ring->last_seg) {
150 ring->last_seg->trbs[TRBS_PER_SEGMENT-1].link.control
151 &= ~cpu_to_le32(LINK_TOGGLE);
152 last->trbs[TRBS_PER_SEGMENT-1].link.control
153 |= cpu_to_le32(LINK_TOGGLE);
154 ring->last_seg = last;
155 }
156 }
157
158 /*
159 * We need a radix tree for mapping physical addresses of TRBs to which stream
160 * ID they belong to. We need to do this because the host controller won't tell
161 * us which stream ring the TRB came from. We could store the stream ID in an
162 * event data TRB, but that doesn't help us for the cancellation case, since the
163 * endpoint may stop before it reaches that event data TRB.
164 *
165 * The radix tree maps the upper portion of the TRB DMA address to a ring
166 * segment that has the same upper portion of DMA addresses. For example, say I
167 * have segments of size 1KB, that are always 1KB aligned. A segment may
168 * start at 0x10c91000 and end at 0x10c913f0. If I use the upper 10 bits, the
169 * key to the stream ID is 0x43244. I can use the DMA address of the TRB to
170 * pass the radix tree a key to get the right stream ID:
171 *
172 * 0x10c90fff >> 10 = 0x43243
173 * 0x10c912c0 >> 10 = 0x43244
174 * 0x10c91400 >> 10 = 0x43245
175 *
176 * Obviously, only those TRBs with DMA addresses that are within the segment
177 * will make the radix tree return the stream ID for that ring.
178 *
179 * Caveats for the radix tree:
180 *
181 * The radix tree uses an unsigned long as a key pair. On 32-bit systems, an
182 * unsigned long will be 32-bits; on a 64-bit system an unsigned long will be
183 * 64-bits. Since we only request 32-bit DMA addresses, we can use that as the
184 * key on 32-bit or 64-bit systems (it would also be fine if we asked for 64-bit
185 * PCI DMA addresses on a 64-bit system). There might be a problem on 32-bit
186 * extended systems (where the DMA address can be bigger than 32-bits),
187 * if we allow the PCI dma mask to be bigger than 32-bits. So don't do that.
188 */
189 static int xhci_insert_segment_mapping(struct radix_tree_root *trb_address_map,
190 struct xhci_ring *ring,
191 struct xhci_segment *seg,
192 gfp_t mem_flags)
193 {
194 unsigned long key;
195 int ret;
196
197 key = (unsigned long)(seg->dma >> TRB_SEGMENT_SHIFT);
198 /* Skip any segments that were already added. */
199 if (radix_tree_lookup(trb_address_map, key))
200 return 0;
201
202 ret = radix_tree_maybe_preload(mem_flags);
203 if (ret)
204 return ret;
205 ret = radix_tree_insert(trb_address_map,
206 key, ring);
207 radix_tree_preload_end();
208 return ret;
209 }
210
> 211 void xhci_remove_segment_mapping(struct radix_tree_root *trb_address_map,
212 struct xhci_segment *seg)
213 {
214 unsigned long key;
215
216 key = (unsigned long)(seg->dma >> TRB_SEGMENT_SHIFT);
217 if (radix_tree_lookup(trb_address_map, key))
218 radix_tree_delete(trb_address_map, key);
219 }
220 EXPORT_SYMBOL_GPL(xhci_remove_segment_mapping);
221
222 static int xhci_update_stream_segment_mapping(
223 struct radix_tree_root *trb_address_map,
224 struct xhci_ring *ring,
225 struct xhci_segment *first_seg,
226 struct xhci_segment *last_seg,
227 gfp_t mem_flags)
228 {
229 struct xhci_segment *seg;
230 struct xhci_segment *failed_seg;
231 int ret;
232
233 if (WARN_ON_ONCE(trb_address_map == NULL))
234 return 0;
235
236 seg = first_seg;
237 do {
238 ret = xhci_insert_segment_mapping(trb_address_map,
239 ring, seg, mem_flags);
240 if (ret)
241 goto remove_streams;
242 if (seg == last_seg)
243 return 0;
244 seg = seg->next;
245 } while (seg != first_seg);
246
247 return 0;
248
249 remove_streams:
250 failed_seg = seg;
251 seg = first_seg;
252 do {
253 xhci_remove_segment_mapping(trb_address_map, seg);
254 if (seg == failed_seg)
255 return ret;
256 seg = seg->next;
257 } while (seg != first_seg);
258
259 return ret;
260 }
261
> 262 void xhci_remove_stream_mapping(struct xhci_ring *ring)
263 {
264 struct xhci_segment *seg;
265
266 if (WARN_ON_ONCE(ring->trb_address_map == NULL))
267 return;
268
269 seg = ring->first_seg;
270 do {
271 xhci_remove_segment_mapping(ring->trb_address_map, seg);
272 seg = seg->next;
273 } while (seg != ring->first_seg);
274 }
275 EXPORT_SYMBOL_GPL(xhci_remove_stream_mapping);
276
---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org
diff --git a/drivers/usb/host/xhci-hub.c b/drivers/usb/host/xhci-hub.c index df3522dab31b..6c1b8d748d0f 100644 --- a/drivers/usb/host/xhci-hub.c +++ b/drivers/usb/host/xhci-hub.c @@ -1809,6 +1809,7 @@ int xhci_bus_suspend(struct usb_hcd *hcd) return 0; } +EXPORT_SYMBOL_GPL(xhci_bus_suspend); /* * Workaround for missing Cold Attach Status (CAS) if device re-plugged in S3. @@ -1953,6 +1954,7 @@ int xhci_bus_resume(struct usb_hcd *hcd) spin_unlock_irqrestore(&xhci->lock, flags); return 0; } +EXPORT_SYMBOL_GPL(xhci_bus_resume); unsigned long xhci_get_resuming_ports(struct usb_hcd *hcd) { diff --git a/drivers/usb/host/xhci-mem.c b/drivers/usb/host/xhci-mem.c index 0e312066c5c6..e6d56ef91ddb 100644 --- a/drivers/usb/host/xhci-mem.c +++ b/drivers/usb/host/xhci-mem.c @@ -65,7 +65,7 @@ static struct xhci_segment *xhci_segment_alloc(struct xhci_hcd *xhci, return seg; } -static void xhci_segment_free(struct xhci_hcd *xhci, struct xhci_segment *seg) +void xhci_segment_free(struct xhci_hcd *xhci, struct xhci_segment *seg) { if (seg->trbs) { dma_pool_free(xhci->segment_pool, seg->trbs, seg->dma); @@ -74,8 +74,9 @@ static void xhci_segment_free(struct xhci_hcd *xhci, struct xhci_segment *seg) kfree(seg->bounce_buf); kfree(seg); } +EXPORT_SYMBOL_GPL(xhci_segment_free); -static void xhci_free_segments_for_ring(struct xhci_hcd *xhci, +void xhci_free_segments_for_ring(struct xhci_hcd *xhci, struct xhci_segment *first) { struct xhci_segment *seg; @@ -96,9 +97,9 @@ static void xhci_free_segments_for_ring(struct xhci_hcd *xhci, * DMA address of the next segment. The caller needs to set any Link TRB * related flags, such as End TRB, Toggle Cycle, and no snoop. */ -static void xhci_link_segments(struct xhci_segment *prev, - struct xhci_segment *next, - enum xhci_ring_type type, bool chain_links) +void xhci_link_segments(struct xhci_segment *prev, + struct xhci_segment *next, + enum xhci_ring_type type, bool chain_links) { u32 val; @@ -118,6 +119,7 @@ static void xhci_link_segments(struct xhci_segment *prev, prev->trbs[TRBS_PER_SEGMENT-1].link.control = cpu_to_le32(val); } } +EXPORT_SYMBOL_GPL(xhci_link_segments); /* * Link the ring to the new segments. @@ -206,7 +208,7 @@ static int xhci_insert_segment_mapping(struct radix_tree_root *trb_address_map, return ret; } -static void xhci_remove_segment_mapping(struct radix_tree_root *trb_address_map, +void xhci_remove_segment_mapping(struct radix_tree_root *trb_address_map, struct xhci_segment *seg) { unsigned long key; @@ -215,6 +217,7 @@ static void xhci_remove_segment_mapping(struct radix_tree_root *trb_address_map, if (radix_tree_lookup(trb_address_map, key)) radix_tree_delete(trb_address_map, key); } +EXPORT_SYMBOL_GPL(xhci_remove_segment_mapping); static int xhci_update_stream_segment_mapping( struct radix_tree_root *trb_address_map, @@ -256,7 +259,7 @@ static int xhci_update_stream_segment_mapping( return ret; } -static void xhci_remove_stream_mapping(struct xhci_ring *ring) +void xhci_remove_stream_mapping(struct xhci_ring *ring) { struct xhci_segment *seg; @@ -269,6 +272,7 @@ static void xhci_remove_stream_mapping(struct xhci_ring *ring) seg = seg->next; } while (seg != ring->first_seg); } +EXPORT_SYMBOL_GPL(xhci_remove_stream_mapping); static int xhci_update_stream_mapping(struct xhci_ring *ring, gfp_t mem_flags) { @@ -292,6 +296,7 @@ void xhci_ring_free(struct xhci_hcd *xhci, struct xhci_ring *ring) kfree(ring); } +EXPORT_SYMBOL_GPL(xhci_ring_free); void xhci_initialize_ring_info(struct xhci_ring *ring, unsigned int cycle_state) @@ -316,6 +321,7 @@ void xhci_initialize_ring_info(struct xhci_ring *ring, */ ring->num_trbs_free = ring->num_segs * (TRBS_PER_SEGMENT - 1) - 1; } +EXPORT_SYMBOL_GPL(xhci_initialize_ring_info); /* Allocate segments and link them for a ring */ static int xhci_alloc_segments_for_ring(struct xhci_hcd *xhci, @@ -407,6 +413,7 @@ struct xhci_ring *xhci_ring_alloc(struct xhci_hcd *xhci, kfree(ring); return NULL; } +EXPORT_SYMBOL_GPL(xhci_ring_alloc); void xhci_free_endpoint_ring(struct xhci_hcd *xhci, struct xhci_virt_device *virt_dev, @@ -519,6 +526,7 @@ struct xhci_slot_ctx *xhci_get_slot_ctx(struct xhci_hcd *xhci, return (struct xhci_slot_ctx *) (ctx->bytes + CTX_SIZE(xhci->hcc_params)); } +EXPORT_SYMBOL_GPL(xhci_get_slot_ctx); struct xhci_ep_ctx *xhci_get_ep_ctx(struct xhci_hcd *xhci, struct xhci_container_ctx *ctx, @@ -1755,6 +1763,7 @@ struct xhci_command *xhci_alloc_command(struct xhci_hcd *xhci, INIT_LIST_HEAD(&command->cmd_list); return command; } +EXPORT_SYMBOL_GPL(xhci_alloc_command); struct xhci_command *xhci_alloc_command_with_ctx(struct xhci_hcd *xhci, bool allocate_completion, gfp_t mem_flags) @@ -1788,6 +1797,7 @@ void xhci_free_command(struct xhci_hcd *xhci, kfree(command->completion); kfree(command); } +EXPORT_SYMBOL_GPL(xhci_free_command); int xhci_alloc_erst(struct xhci_hcd *xhci, struct xhci_ring *evt_ring, @@ -1818,6 +1828,7 @@ int xhci_alloc_erst(struct xhci_hcd *xhci, return 0; } +EXPORT_SYMBOL_GPL(xhci_alloc_erst); void xhci_free_erst(struct xhci_hcd *xhci, struct xhci_erst *erst) { @@ -1831,6 +1842,7 @@ void xhci_free_erst(struct xhci_hcd *xhci, struct xhci_erst *erst) erst->erst_dma_addr); erst->entries = NULL; } +EXPORT_SYMBOL_GPL(xhci_free_erst); void xhci_mem_cleanup(struct xhci_hcd *xhci) { @@ -1969,7 +1981,7 @@ static int xhci_test_trb_in_td(struct xhci_hcd *xhci, } /* TRB math checks for xhci_trb_in_td(), using the command and event rings. */ -static int xhci_check_trb_in_td_math(struct xhci_hcd *xhci) +int xhci_check_trb_in_td_math(struct xhci_hcd *xhci) { struct { dma_addr_t input_dma; @@ -2089,6 +2101,7 @@ static int xhci_check_trb_in_td_math(struct xhci_hcd *xhci) xhci_dbg(xhci, "TRB math tests passed.\n"); return 0; } +EXPORT_SYMBOL_GPL(xhci_check_trb_in_td_math); static void xhci_set_hc_event_deq(struct xhci_hcd *xhci) { diff --git a/drivers/usb/host/xhci-ring.c b/drivers/usb/host/xhci-ring.c index d0b6806275e0..2e99393560e5 100644 --- a/drivers/usb/host/xhci-ring.c +++ b/drivers/usb/host/xhci-ring.c @@ -79,6 +79,7 @@ dma_addr_t xhci_trb_virt_to_dma(struct xhci_segment *seg, return 0; return seg->dma + (segment_offset * sizeof(*trb)); } +EXPORT_SYMBOL_GPL(xhci_trb_virt_to_dma); static bool trb_is_noop(union xhci_trb *trb) { @@ -311,6 +312,7 @@ void xhci_ring_cmd_db(struct xhci_hcd *xhci) /* Flush PCI posted writes */ readl(&xhci->dba->doorbell[0]); } +EXPORT_SYMBOL_GPL(xhci_ring_cmd_db); static bool xhci_mod_cmd_timer(struct xhci_hcd *xhci, unsigned long delay) { @@ -2965,7 +2967,7 @@ static int handle_tx_event(struct xhci_hcd *xhci, * Returns >0 for "possibly more events to process" (caller should call again), * otherwise 0 if done. In future, <0 returns should indicate error code. */ -static int xhci_handle_event(struct xhci_hcd *xhci) +int xhci_handle_event(struct xhci_hcd *xhci) { union xhci_trb *event; int update_ptrs = 1; @@ -3034,13 +3036,14 @@ static int xhci_handle_event(struct xhci_hcd *xhci) */ return 1; } +EXPORT_SYMBOL_GPL(xhci_handle_event); /* * Update Event Ring Dequeue Pointer: * - When all events have finished * - To avoid "Event Ring Full Error" condition */ -static void xhci_update_erst_dequeue(struct xhci_hcd *xhci, +void xhci_update_erst_dequeue(struct xhci_hcd *xhci, union xhci_trb *event_ring_deq) { u64 temp_64; @@ -3070,6 +3073,7 @@ static void xhci_update_erst_dequeue(struct xhci_hcd *xhci, temp_64 |= ERST_EHB; xhci_write_64(xhci, temp_64, &xhci->ir_set->erst_dequeue); } +EXPORT_SYMBOL_GPL(xhci_update_erst_dequeue); /* * xHCI spec says we can get an interrupt, and if the HC has an error condition, @@ -4420,6 +4424,7 @@ int xhci_queue_stop_endpoint(struct xhci_hcd *xhci, struct xhci_command *cmd, return queue_command(xhci, cmd, 0, 0, 0, trb_slot_id | trb_ep_index | type | trb_suspend, false); } +EXPORT_SYMBOL_GPL(xhci_queue_stop_endpoint); int xhci_queue_reset_ep(struct xhci_hcd *xhci, struct xhci_command *cmd, int slot_id, unsigned int ep_index, diff --git a/drivers/usb/host/xhci.c b/drivers/usb/host/xhci.c index dc357cabb265..041a65a6f175 100644 --- a/drivers/usb/host/xhci.c +++ b/drivers/usb/host/xhci.c @@ -1449,6 +1449,7 @@ unsigned int xhci_get_endpoint_address(unsigned int ep_index) unsigned int direction = ep_index % 2 ? USB_DIR_OUT : USB_DIR_IN; return direction | number; } +EXPORT_SYMBOL_GPL(xhci_get_endpoint_address); /* Find the flag for this endpoint (for use in the control context). Use the * endpoint index to create a bitmask. The slot context is bit 0, endpoint 0 is @@ -4306,10 +4307,11 @@ static int xhci_setup_device(struct usb_hcd *hcd, struct usb_device *udev, return ret; } -static int xhci_address_device(struct usb_hcd *hcd, struct usb_device *udev) +int xhci_address_device(struct usb_hcd *hcd, struct usb_device *udev) { return xhci_setup_device(hcd, udev, SETUP_CONTEXT_ADDRESS); } +EXPORT_SYMBOL_GPL(xhci_address_device); static int xhci_enable_device(struct usb_hcd *hcd, struct usb_device *udev) {
Export symbols for xhci hooks usage: xhci_ring_free - Allow xhci hook to free xhci_ring. xhci_get_slot_ctx - Allow xhci hook to get slot_ctx from the xhci_container_ctx for getting the slot_ctx information to know which slot is offloading and compare the context in remote subsystem memory if needed. xhci_get_ep_ctx - Allow xhci hook to get ep_ctx from the xhci_container_ctx for getting the ep_ctx information to know which ep is offloading and comparing the context in remote subsystem memory if needed. xhci_handle_event - Allow xhci hook to handle the xhci events from the USB controller. xhci_update_erst_dequeue - If xhci events was handle by xhci hook, it needs to update the erst dequeue pointer to let the USB controller know the events was handled. xhci_ring_alloc - Allocate a struct xhci_ring. xhci_alloc_erst xhci_free_erst - Allocate and free event ring segment tables. xhci_trb_virt_to_dma - Used to retrieve the DMA address of a TRB xhci_ring_cmd_db - Notify the controller when a new command is issued xhci_alloc_command xhci_free_command - Allocate and free a struct xhci_command xhci_queue_stop_endpoint - Issue a stop endpoint command to the controller xhci_segment_free - Free a segment struct. xhci_link_segments - Make the prev segment point to the next segment. xhci_initialize_ring_info - Initialize a ring struct. xhci_check_trb_in_td_math - Check TRB math for validation. xhci_get_endpoint_address - Get endpoint address from endpoint index. xhci_address_device - Issue an address device command xhci_bus_suspend xhci_bus_resume - Suspend and resume for power scenario xhci_remove_stream_mapping - Remove stream mapping in stream endpoint xhci_remove_segment_mapping - Remove segment mapping Signed-off-by: Daehwan Jung <dh10.jung@samsung.com> --- drivers/usb/host/xhci-hub.c | 2 ++ drivers/usb/host/xhci-mem.c | 29 +++++++++++++++++++++-------- drivers/usb/host/xhci-ring.c | 9 +++++++-- drivers/usb/host/xhci.c | 4 +++- 4 files changed, 33 insertions(+), 11 deletions(-)