4:58 p.m.
tree: https://git.kernel.org/pub/scm/linux/kernel/git/tnguy/next-queue.git dev-queue
head: 3f69b6741396fada730c8a1ccc0bfa8c771b9dab
commit: 44f0d25c501202f999773c94ee0a11d7e7376b76 [73/96] igc: Fix igc_ptp_rx_pktstamp()
config: i386-randconfig-s002-20201113 (attached as .config)
compiler: gcc-9 (Debian 9.3.0-15) 9.3.0
reproduce:
# apt-get install sparse
# sparse version: v0.6.3-107-gaf3512a6-dirty
#
https://git.kernel.org/pub/scm/linux/kernel/git/tnguy/next-queue.git/comm...
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 44f0d25c501202f999773c94ee0a11d7e7376b76
# 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(a)intel.com>
"sparse warnings: (new ones prefixed by >>)"
> drivers/net/ethernet/intel/igc/igc_ptp.c:183:18: sparse: sparse:
cast to restricted __le32
drivers/net/ethernet/intel/igc/igc_ptp.c:184:24:
sparse: sparse: cast to restricted __le32
drivers/net/ethernet/intel/igc/igc_ptp.c:458:21: sparse: sparse: cast to restricted
__be32
drivers/net/ethernet/intel/igc/igc_ptp.c:458:21: sparse: sparse: cast to restricted
__be32
drivers/net/ethernet/intel/igc/igc_ptp.c:458:21: sparse: sparse: cast to restricted
__be32
drivers/net/ethernet/intel/igc/igc_ptp.c:458:21: sparse: sparse: cast to restricted
__be32
drivers/net/ethernet/intel/igc/igc_ptp.c:458:21: sparse: sparse: cast to restricted
__be32
drivers/net/ethernet/intel/igc/igc_ptp.c:458:21: sparse: sparse: cast to restricted
__be32
vim +183 drivers/net/ethernet/intel/igc/igc_ptp.c
155
156 /**
157 * igc_ptp_rx_pktstamp - Retrieve timestamp from Rx packet buffer
158 * @q_vector: Pointer to interrupt specific structure
159 * @va: Pointer to address containing Rx buffer
160 * @skb: Buffer containing timestamp and packet
161 *
162 * This function retrieves the timestamp saved in the beginning of packet
163 * buffer. While two timestamps are available, one in timer0 reference and the
164 * other in timer1 reference, this function considers only the timestamp in
165 * timer0 reference.
166 */
167 void igc_ptp_rx_pktstamp(struct igc_q_vector *q_vector, u32 *va,
168 struct sk_buff *skb)
169 {
170 struct igc_adapter *adapter = q_vector->adapter;
171 u64 regval;
172 int adjust;
173
174 /* Timestamps are saved in little endian at the beginning of the packet
175 * buffer following the layout:
176 *
177 * DWORD: | 0 | 1 | 2 | 3 |
178 * Field: | Timer1 SYSTIML | Timer1 SYSTIMH | Timer0 SYSTIML | Timer0 SYSTIMH |
179 *
180 * SYSTIML holds the nanoseconds part while SYSTIMH holds the seconds
181 * part of the timestamp.
182 */
183 regval = le32_to_cpu(va[2]);
184 regval |=
(u64)le32_to_cpu(va[3]) << 32;
185 igc_ptp_systim_to_hwtstamp(adapter, skb_hwtstamps(skb), regval);
186
187 /* Adjust timestamp for the RX latency based on link speed */
188 switch (adapter->link_speed) {
189 case SPEED_10:
190 adjust = IGC_I225_RX_LATENCY_10;
191 break;
192 case SPEED_100:
193 adjust = IGC_I225_RX_LATENCY_100;
194 break;
195 case SPEED_1000:
196 adjust = IGC_I225_RX_LATENCY_1000;
197 break;
198 case SPEED_2500:
199 adjust = IGC_I225_RX_LATENCY_2500;
200 break;
201 default:
202 adjust = 0;
203 netdev_warn_once(adapter->netdev, "Imprecise timestamp\n");
204 break;
205 }
206 skb_hwtstamps(skb)->hwtstamp =
207 ktime_sub_ns(skb_hwtstamps(skb)->hwtstamp, adjust);
208 }
209
---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org