drivers/net/wireless/intel/iwlwifi/iwl-trans.c:154:34: sparse: sparse: incorrect type in assignment (different address spaces)

From: kernel test robot
Date: Thu Jan 14 2021 - 17:21:28 EST

tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: 65f0d2414b7079556fbbcc070b3d1c9f9587606d
commit: 0cd1ad2d7fd41e0de4969fd1dd0aa846c99830d1 iwlwifi: move all bus-independent TX functions to common code
date: 4 months ago
config: i386-randconfig-s002-20210115 (attached as .config)
compiler: gcc-9 (Debian 9.3.0-15) 9.3.0
reproduce:
# apt-get install sparse
# sparse version: v0.6.3-208-g46a52ca4-dirty
# https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=0cd1ad2d7fd41e0de4969fd1dd0aa846c99830d1
git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
git fetch --no-tags linus master
git checkout 0cd1ad2d7fd41e0de4969fd1dd0aa846c99830d1
# save the attached .config to linux build tree
make W=1 C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' ARCH=i386

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@xxxxxxxxx>


"sparse warnings: (new ones prefixed by >>)"
drivers/net/wireless/intel/iwlwifi/iwl-trans.c: note: in included file (through drivers/net/wireless/intel/iwlwifi/fw/img.h, drivers/net/wireless/intel/iwlwifi/iwl-trans.h):
drivers/net/wireless/intel/iwlwifi/fw/file.h:330:19: sparse: sparse: mixed bitwiseness
drivers/net/wireless/intel/iwlwifi/fw/file.h:485:19: sparse: sparse: mixed bitwiseness
drivers/net/wireless/intel/iwlwifi/iwl-trans.c: note: in included file:
drivers/net/wireless/intel/iwlwifi/iwl-trans.h:788:52: sparse: sparse: array of flexible structures
>> drivers/net/wireless/intel/iwlwifi/iwl-trans.c:154:34: sparse: sparse: incorrect type in assignment (different address spaces) @@ expected struct iwl_tso_hdr_page *tso_hdr_page @@ got struct iwl_tso_hdr_page [noderef] __percpu * @@
drivers/net/wireless/intel/iwlwifi/iwl-trans.c:154:34: sparse: expected struct iwl_tso_hdr_page *tso_hdr_page
drivers/net/wireless/intel/iwlwifi/iwl-trans.c:154:34: sparse: got struct iwl_tso_hdr_page [noderef] __percpu *
>> drivers/net/wireless/intel/iwlwifi/iwl-trans.c:169:25: sparse: sparse: incorrect type in initializer (different address spaces) @@ expected void const [noderef] __percpu *__vpp_verify @@ got struct iwl_tso_hdr_page * @@
drivers/net/wireless/intel/iwlwifi/iwl-trans.c:169:25: sparse: expected void const [noderef] __percpu *__vpp_verify
drivers/net/wireless/intel/iwlwifi/iwl-trans.c:169:25: sparse: got struct iwl_tso_hdr_page *
>> drivers/net/wireless/intel/iwlwifi/iwl-trans.c:175:32: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected void [noderef] __percpu *__pdata @@ got struct iwl_tso_hdr_page *tso_hdr_page @@
drivers/net/wireless/intel/iwlwifi/iwl-trans.c:175:32: sparse: expected void [noderef] __percpu *__pdata
drivers/net/wireless/intel/iwlwifi/iwl-trans.c:175:32: sparse: got struct iwl_tso_hdr_page *tso_hdr_page
--
drivers/net/wireless/intel/iwlwifi/queue/tx.c: note: in included file (through drivers/net/wireless/intel/iwlwifi/fw/img.h, drivers/net/wireless/intel/iwlwifi/iwl-trans.h, ...):
drivers/net/wireless/intel/iwlwifi/fw/file.h:330:19: sparse: sparse: mixed bitwiseness
drivers/net/wireless/intel/iwlwifi/fw/file.h:485:19: sparse: sparse: mixed bitwiseness
drivers/net/wireless/intel/iwlwifi/queue/tx.c: note: in included file (through drivers/net/wireless/intel/iwlwifi/iwl-devtrace.h, drivers/net/wireless/intel/iwlwifi/iwl-io.h):
drivers/net/wireless/intel/iwlwifi/iwl-trans.h:788:52: sparse: sparse: array of flexible structures
>> drivers/net/wireless/intel/iwlwifi/queue/tx.c:354:38: sparse: sparse: incorrect type in initializer (different address spaces) @@ expected void const [noderef] __percpu *__vpp_verify @@ got struct iwl_tso_hdr_page * @@
drivers/net/wireless/intel/iwlwifi/queue/tx.c:354:38: sparse: expected void const [noderef] __percpu *__vpp_verify
drivers/net/wireless/intel/iwlwifi/queue/tx.c:354:38: sparse: got struct iwl_tso_hdr_page *

vim +154 drivers/net/wireless/intel/iwlwifi/iwl-trans.c

110
111 trans->dev = dev;
112 trans->ops = ops;
113 trans->num_rx_queues = 1;
114
115 if (trans->trans_cfg->device_family >= IWL_DEVICE_FAMILY_AX210)
116 trans->txqs.bc_tbl_size = sizeof(struct iwl_gen3_bc_tbl);
117 else
118 trans->txqs.bc_tbl_size = sizeof(struct iwlagn_scd_bc_tbl);
119 /*
120 * For gen2 devices, we use a single allocation for each byte-count
121 * table, but they're pretty small (1k) so use a DMA pool that we
122 * allocate here.
123 */
124 if (trans->trans_cfg->gen2) {
125 trans->txqs.bc_pool = dmam_pool_create("iwlwifi:bc", dev,
126 trans->txqs.bc_tbl_size,
127 256, 0);
128 if (!trans->txqs.bc_pool)
129 return NULL;
130 }
131
132 if (trans->trans_cfg->use_tfh) {
133 trans->txqs.tfd.addr_size = 64;
134 trans->txqs.tfd.max_tbs = IWL_TFH_NUM_TBS;
135 trans->txqs.tfd.size = sizeof(struct iwl_tfh_tfd);
136 } else {
137 trans->txqs.tfd.addr_size = 36;
138 trans->txqs.tfd.max_tbs = IWL_NUM_OF_TBS;
139 trans->txqs.tfd.size = sizeof(struct iwl_tfd);
140 }
141 trans->max_skb_frags = IWL_TRANS_MAX_FRAGS(trans);
142
143 snprintf(trans->dev_cmd_pool_name, sizeof(trans->dev_cmd_pool_name),
144 "iwl_cmd_pool:%s", dev_name(trans->dev));
145 trans->dev_cmd_pool =
146 kmem_cache_create(trans->dev_cmd_pool_name,
147 txcmd_size, txcmd_align,
148 SLAB_HWCACHE_ALIGN, NULL);
149 if (!trans->dev_cmd_pool)
150 return NULL;
151
152 WARN_ON(!ops->wait_txq_empty && !ops->wait_tx_queues_empty);
153
> 154 trans->txqs.tso_hdr_page = alloc_percpu(struct iwl_tso_hdr_page);
155 if (!trans->txqs.tso_hdr_page) {
156 kmem_cache_destroy(trans->dev_cmd_pool);
157 return NULL;
158 }
159
160 return trans;
161 }
162
163 void iwl_trans_free(struct iwl_trans *trans)
164 {
165 int i;
166
167 for_each_possible_cpu(i) {
168 struct iwl_tso_hdr_page *p =
> 169 per_cpu_ptr(trans->txqs.tso_hdr_page, i);
170
171 if (p->page)
172 __free_page(p->page);
173 }
174
> 175 free_percpu(trans->txqs.tso_hdr_page);
176
177 kmem_cache_destroy(trans->dev_cmd_pool);
178 }
179

---
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Attachment: .config.gz
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