From: kbuild test robot <lkp@intel.com>
To: Serge Semin <fancer.lancer@gmail.com>
Cc: kbuild-all@01.org, jdmason@kudzu.us, dave.jiang@intel.com,
Allen.Hubbe@emc.com, Shyam-sundar.S-k@amd.com,
Xiangliang.Yu@amd.com, gary.hook@amd.com,
Sergey.Semin@t-platforms.ru, linux-ntb@googlegroups.com,
linux-kernel@vger.kernel.org,
Serge Semin <fancer.lancer@gmail.com>
Subject: Re: [PATCH v2 06/15] NTB: ntb_perf: Add full multi-port NTB API support
Date: Wed, 6 Dec 2017 09:17:37 +0800 [thread overview]
Message-ID: <201712060819.S40pUs16%fengguang.wu@intel.com> (raw)
In-Reply-To: <20171203191736.3399-7-fancer.lancer@gmail.com>
[-- Attachment #1: Type: text/plain, Size: 3618 bytes --]
Hi Serge,
I love your patch! Perhaps something to improve:
[auto build test WARNING on linus/master]
[also build test WARNING on v4.15-rc2]
[cannot apply to ntb/ntb-next next-20171205]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]
url: https://github.com/0day-ci/linux/commits/Serge-Semin/NTB-Add-full-multi-port-API-support-to-the-test-drivers/20171206-081300
config: x86_64-randconfig-x004-201749 (attached as .config)
compiler: gcc-7 (Debian 7.2.0-12) 7.2.1 20171025
reproduce:
# save the attached .config to linux build tree
make ARCH=x86_64
Note: it may well be a FALSE warning. FWIW you are at least aware of it now.
http://gcc.gnu.org/wiki/Better_Uninitialized_Warnings
All warnings (new ones prefixed by >>):
drivers/ntb/test/ntb_perf.c: In function 'perf_thread_work':
>> drivers/ntb/test/ntb_perf.c:821:22: warning: 'try' may be used uninitialized in this function [-Wmaybe-uninitialized]
} while (!tx && (try++ < DMA_TRIES));
~~~^~
drivers/ntb/test/ntb_perf.c:782:6: note: 'try' was declared here
int try, ret = 0;
^~~
vim +/try +821 drivers/ntb/test/ntb_perf.c
775
776 static int perf_copy_chunk(struct perf_thread *pthr,
777 void __iomem *dst, void *src, size_t len)
778 {
779 struct dma_async_tx_descriptor *tx;
780 struct dmaengine_unmap_data *unmap;
781 struct device *dma_dev;
782 int try, ret = 0;
783
784 if (!use_dma) {
785 memcpy_toio(dst, src, len);
786 goto ret_check_tsync;
787 }
788
789 dma_dev = pthr->dma_chan->device->dev;
790
791 if (!is_dma_copy_aligned(pthr->dma_chan->device, offset_in_page(src),
792 offset_in_page(dst), len))
793 return -EIO;
794
795 unmap = dmaengine_get_unmap_data(dma_dev, 2, GFP_NOWAIT);
796 if (!unmap)
797 return -ENOMEM;
798
799 unmap->len = len;
800 unmap->addr[0] = dma_map_page(dma_dev, virt_to_page(src),
801 offset_in_page(src), len, DMA_TO_DEVICE);
802 if (dma_mapping_error(dma_dev, unmap->addr[0])) {
803 ret = -EIO;
804 goto err_free_resource;
805 }
806 unmap->to_cnt = 1;
807
808 unmap->addr[1] = dma_map_page(dma_dev, virt_to_page(dst),
809 offset_in_page(dst), len, DMA_FROM_DEVICE);
810 if (dma_mapping_error(dma_dev, unmap->addr[1])) {
811 ret = -EIO;
812 goto err_free_resource;
813 }
814 unmap->from_cnt = 1;
815
816 do {
817 tx = dmaengine_prep_dma_memcpy(pthr->dma_chan, unmap->addr[1],
818 unmap->addr[0], len, DMA_PREP_INTERRUPT | DMA_CTRL_ACK);
819 if (!tx)
820 msleep(DMA_MDELAY);
> 821 } while (!tx && (try++ < DMA_TRIES));
822
823 if (!tx) {
824 ret = -EIO;
825 goto err_free_resource;
826 }
827
828 tx->callback = perf_dma_copy_callback;
829 tx->callback_param = pthr;
830 dma_set_unmap(tx, unmap);
831
832 if (dma_submit_error(dmaengine_submit(tx))) {
833 dmaengine_unmap_put(unmap);
834 goto err_free_resource;
835 }
836
837 dmaengine_unmap_put(unmap);
838
839 atomic_inc(&pthr->dma_sync);
840 dma_async_issue_pending(pthr->dma_chan);
841
842 ret_check_tsync:
843 return likely(atomic_read(&pthr->perf->tsync) > 0) ? 0 : -EINTR;
844
845 err_free_resource:
846 dmaengine_unmap_put(unmap);
847
848 return ret;
849 }
850
---
0-DAY kernel test infrastructure Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all Intel Corporation
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next prev parent reply other threads:[~2017-12-06 1:18 UTC|newest]
Thread overview: 90+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-12-03 19:17 [PATCH v2 00/15] NTB: Add full multi-port API support to the test drivers Serge Semin
2017-12-03 19:17 ` [PATCH v2 01/15] NTB: Rename NTB messaging API methods Serge Semin
2017-12-05 16:49 ` Jon Mason
2017-12-05 17:31 ` Serge Semin
2017-12-05 18:07 ` Jon Mason
2017-12-05 20:54 ` Serge Semin
2017-12-05 21:48 ` Logan Gunthorpe
2017-12-05 19:11 ` Logan Gunthorpe
2017-12-03 19:17 ` [PATCH v2 02/15] NTB: Set dma mask and dma coherent mask to NTB devices Serge Semin
2017-12-05 16:51 ` Jon Mason
2017-12-05 17:21 ` Logan Gunthorpe
2017-12-05 17:48 ` Serge Semin
2017-12-03 19:17 ` [PATCH v2 03/15] NTB: Fix UB/bug in ntb_mw_get_align() Serge Semin
2017-12-05 16:52 ` Jon Mason
2017-12-05 17:01 ` Logan Gunthorpe
2017-12-05 17:08 ` Jon Mason
2017-12-05 17:56 ` Serge Semin
2017-12-05 18:08 ` Jon Mason
2017-12-05 20:57 ` Serge Semin
2017-12-03 19:17 ` [PATCH v2 04/15] NTB: ntb_pp: Add full multi-port NTB API support Serge Semin
2017-12-05 17:02 ` Jon Mason
2017-12-05 19:53 ` Serge Semin
2017-12-05 19:53 ` Serge Semin
2017-12-05 21:50 ` Logan Gunthorpe
2017-12-03 19:17 ` [PATCH v2 05/15] NTB: ntb_tool: " Serge Semin
2017-12-05 18:03 ` Jon Mason
2017-12-05 19:16 ` Logan Gunthorpe
2017-12-05 20:01 ` Serge Semin
2017-12-03 19:17 ` [PATCH v2 06/15] NTB: ntb_perf: " Serge Semin
2017-12-05 18:21 ` Jon Mason
2017-12-05 20:29 ` Serge Semin
2017-12-06 1:17 ` kbuild test robot [this message]
2017-12-03 19:17 ` [PATCH v2 07/15] NTB: ntb_test: Safely use paths with whitespace Serge Semin
2017-12-05 18:24 ` Jon Mason
2017-12-03 19:17 ` [PATCH v2 08/15] NTB: ntb_test: Add ntb_tool port tests Serge Semin
2017-12-03 19:17 ` [PATCH v2 09/15] NTB: ntb_test: Update ntb_tool link tests Serge Semin
2017-12-05 18:26 ` Jon Mason
2017-12-05 20:37 ` Serge Semin
2017-12-03 19:17 ` [PATCH v2 10/15] NTB: ntb_test: Update ntb_tool DB tests Serge Semin
2017-12-05 18:27 ` Jon Mason
2017-12-05 19:38 ` Logan Gunthorpe
2017-12-05 20:42 ` Serge Semin
2017-12-03 19:17 ` [PATCH v2 11/15] NTB: ntb_test: Update ntb_tool Scratchpad tests Serge Semin
2017-12-03 19:17 ` [PATCH v2 12/15] NTB: ntb_test: Add ntb_tool Message tests Serge Semin
2017-12-03 19:17 ` [PATCH v2 13/15] NTB: ntb_test: Update ntb_tool MW tests Serge Semin
2017-12-03 19:17 ` [PATCH v2 14/15] NTB: ntb_test: Update ntb_perf tests Serge Semin
2017-12-03 19:17 ` [PATCH v2 15/15] NTB: ntb_hw_idt: Set NTB_TOPO_SWITCH topology Serge Semin
2017-12-04 4:54 ` [PATCH v2 00/15] NTB: Add full multi-port API support to the test drivers Logan Gunthorpe
2017-12-04 6:12 ` Serge Semin
2017-12-04 20:10 ` Allen Hubbe
2017-12-04 20:10 ` Allen Hubbe
2017-12-05 15:54 ` Serge Semin
2017-12-05 16:57 ` Logan Gunthorpe
2017-12-05 22:39 ` [PATCH v3 " Serge Semin
2017-12-05 22:39 ` [PATCH v3 01/15] NTB: Rename NTB messaging API methods Serge Semin
2017-12-05 23:36 ` Logan Gunthorpe
2017-12-05 22:39 ` [PATCH v3 02/15] NTB: Set dma mask and dma coherent mask to NTB devices Serge Semin
2017-12-05 23:39 ` Logan Gunthorpe
2017-12-05 22:39 ` [PATCH v3 03/15] NTB: Fix UB/bug in ntb_mw_get_align() Serge Semin
2017-12-05 23:38 ` Logan Gunthorpe
2017-12-05 22:39 ` [PATCH v3 04/15] NTB: ntb_pp: Add full multi-port NTB API support Serge Semin
2017-12-05 22:39 ` [PATCH v3 05/15] NTB: ntb_tool: " Serge Semin
2017-12-05 22:39 ` [PATCH v3 06/15] NTB: ntb_perf: " Serge Semin
2017-12-05 22:39 ` [PATCH v3 07/15] NTB: ntb_test: Safely use paths with whitespace Serge Semin
2017-12-05 22:39 ` [PATCH v3 08/15] NTB: ntb_test: Add ntb_tool port tests Serge Semin
2017-12-05 22:39 ` [PATCH v3 09/15] NTB: ntb_test: Update ntb_tool link tests Serge Semin
2017-12-05 22:39 ` [PATCH v3 10/15] NTB: ntb_test: Update ntb_tool DB tests Serge Semin
2017-12-05 22:39 ` [PATCH v3 11/15] NTB: ntb_test: Update ntb_tool Scratchpad tests Serge Semin
2017-12-05 22:39 ` [PATCH v3 12/15] NTB: ntb_test: Add ntb_tool Message tests Serge Semin
2017-12-05 22:39 ` [PATCH v3 13/15] NTB: ntb_test: Update ntb_tool MW tests Serge Semin
2017-12-05 22:39 ` [PATCH v3 14/15] NTB: ntb_test: Update ntb_perf tests Serge Semin
2017-12-05 22:39 ` [PATCH v3 15/15] NTB: ntb_hw_idt: Set NTB_TOPO_SWITCH topology Serge Semin
2017-12-05 23:36 ` [PATCH v3 00/15] NTB: Add full multi-port API support to the test drivers Logan Gunthorpe
2017-12-06 14:31 ` [PATCH v4 " Serge Semin
2017-12-06 14:31 ` [PATCH v4 01/15] NTB: Rename NTB messaging API methods Serge Semin
2017-12-06 14:31 ` [PATCH v4 02/15] NTB: Set dma mask and dma coherent mask to NTB devices Serge Semin
2017-12-06 14:31 ` [PATCH v4 03/15] NTB: Fix UB/bug in ntb_mw_get_align() Serge Semin
2017-12-06 14:31 ` [PATCH v4 04/15] NTB: ntb_pp: Add full multi-port NTB API support Serge Semin
2017-12-06 14:31 ` [PATCH v4 05/15] NTB: ntb_tool: " Serge Semin
2017-12-06 14:31 ` [PATCH v4 06/15] NTB: ntb_perf: " Serge Semin
2017-12-06 14:31 ` [PATCH v4 07/15] NTB: ntb_test: Safely use paths with whitespace Serge Semin
2017-12-06 14:31 ` [PATCH v4 08/15] NTB: ntb_test: Add ntb_tool port tests Serge Semin
2017-12-06 14:32 ` [PATCH v4 09/15] NTB: ntb_test: Update ntb_tool link tests Serge Semin
2017-12-06 14:32 ` [PATCH v4 10/15] NTB: ntb_test: Update ntb_tool DB tests Serge Semin
2017-12-06 14:32 ` [PATCH v4 11/15] NTB: ntb_test: Update ntb_tool Scratchpad tests Serge Semin
2017-12-06 14:32 ` [PATCH v4 12/15] NTB: ntb_test: Add ntb_tool Message tests Serge Semin
2017-12-06 14:32 ` [PATCH v4 13/15] NTB: ntb_test: Update ntb_tool MW tests Serge Semin
2017-12-06 14:32 ` [PATCH v4 14/15] NTB: ntb_test: Update ntb_perf tests Serge Semin
2017-12-06 14:32 ` [PATCH v4 15/15] NTB: ntb_hw_idt: Set NTB_TOPO_SWITCH topology Serge Semin
2018-01-18 22:28 ` [PATCH v4 00/15] NTB: Add full multi-port API support to the test drivers Jon Mason
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