[Intel-wired-lan] [tnguy-next-queue:dev-queue 43/112] drivers/net/ethernet/intel/igc/igc_ptp.c:181:18: sparse: sparse: cast to restricted __le32
kernel test robot
lkp at intel.com
Sun Dec 13 17:56:00 UTC 2020
tree: https://git.kernel.org/pub/scm/linux/kernel/git/tnguy/next-queue.git dev-queue
head: 49dd24e929ffd092788636429902443068bf9ebc
commit: 43483dcb31045ba36ac703314ca664429e339a95 [43/112] igc: Fix igc_ptp_rx_pktstamp()
config: parisc-randconfig-s032-20201213 (attached as .config)
compiler: hppa-linux-gcc (GCC) 9.3.0
reproduce:
wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
chmod +x ~/bin/make.cross
# apt-get install sparse
# sparse version: v0.6.3-184-g1b896707-dirty
# https://git.kernel.org/pub/scm/linux/kernel/git/tnguy/next-queue.git/commit/?id=43483dcb31045ba36ac703314ca664429e339a95
git remote add tnguy-next-queue https://git.kernel.org/pub/scm/linux/kernel/git/tnguy/next-queue.git
git fetch --no-tags tnguy-next-queue dev-queue
git checkout 43483dcb31045ba36ac703314ca664429e339a95
# save the attached .config to linux build tree
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' ARCH=parisc
If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp at intel.com>
"sparse warnings: (new ones prefixed by >>)"
>> drivers/net/ethernet/intel/igc/igc_ptp.c:181:18: sparse: sparse: cast to restricted __le32
>> drivers/net/ethernet/intel/igc/igc_ptp.c:181:18: sparse: sparse: cast to restricted __le32
>> drivers/net/ethernet/intel/igc/igc_ptp.c:181:18: sparse: sparse: cast to restricted __le32
>> drivers/net/ethernet/intel/igc/igc_ptp.c:181:18: sparse: sparse: cast to restricted __le32
>> drivers/net/ethernet/intel/igc/igc_ptp.c:181:18: sparse: sparse: cast to restricted __le32
>> drivers/net/ethernet/intel/igc/igc_ptp.c:181:18: sparse: sparse: cast to restricted __le32
drivers/net/ethernet/intel/igc/igc_ptp.c:182:24: sparse: sparse: cast to restricted __le32
drivers/net/ethernet/intel/igc/igc_ptp.c:182:24: sparse: sparse: cast to restricted __le32
drivers/net/ethernet/intel/igc/igc_ptp.c:182:24: sparse: sparse: cast to restricted __le32
drivers/net/ethernet/intel/igc/igc_ptp.c:182:24: sparse: sparse: cast to restricted __le32
drivers/net/ethernet/intel/igc/igc_ptp.c:182:24: sparse: sparse: cast to restricted __le32
drivers/net/ethernet/intel/igc/igc_ptp.c:182:24: sparse: sparse: cast to restricted __le32
vim +181 drivers/net/ethernet/intel/igc/igc_ptp.c
153
154 /**
155 * igc_ptp_rx_pktstamp - Retrieve timestamp from Rx packet buffer
156 * @q_vector: Pointer to interrupt specific structure
157 * @va: Pointer to address containing Rx buffer
158 * @skb: Buffer containing timestamp and packet
159 *
160 * This function retrieves the timestamp saved in the beginning of packet
161 * buffer. While two timestamps are available, one in timer0 reference and the
162 * other in timer1 reference, this function considers only the timestamp in
163 * timer0 reference.
164 */
165 void igc_ptp_rx_pktstamp(struct igc_q_vector *q_vector, u32 *va,
166 struct sk_buff *skb)
167 {
168 struct igc_adapter *adapter = q_vector->adapter;
169 u64 regval;
170 int adjust;
171
172 /* Timestamps are saved in little endian at the beginning of the packet
173 * buffer following the layout:
174 *
175 * DWORD: | 0 | 1 | 2 | 3 |
176 * Field: | Timer1 SYSTIML | Timer1 SYSTIMH | Timer0 SYSTIML | Timer0 SYSTIMH |
177 *
178 * SYSTIML holds the nanoseconds part while SYSTIMH holds the seconds
179 * part of the timestamp.
180 */
> 181 regval = le32_to_cpu(va[2]);
182 regval |= (u64)le32_to_cpu(va[3]) << 32;
183 igc_ptp_systim_to_hwtstamp(adapter, skb_hwtstamps(skb), regval);
184
185 /* Adjust timestamp for the RX latency based on link speed */
186 switch (adapter->link_speed) {
187 case SPEED_10:
188 adjust = IGC_I225_RX_LATENCY_10;
189 break;
190 case SPEED_100:
191 adjust = IGC_I225_RX_LATENCY_100;
192 break;
193 case SPEED_1000:
194 adjust = IGC_I225_RX_LATENCY_1000;
195 break;
196 case SPEED_2500:
197 adjust = IGC_I225_RX_LATENCY_2500;
198 break;
199 default:
200 adjust = 0;
201 netdev_warn_once(adapter->netdev, "Imprecise timestamp\n");
202 break;
203 }
204 skb_hwtstamps(skb)->hwtstamp =
205 ktime_sub_ns(skb_hwtstamps(skb)->hwtstamp, adjust);
206 }
207
---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org
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