Re: [PATCH] nvme: rdma: Add check for queue in nvmet_rdma_cm_handler()

From: kernel test robot
Date: Fri Nov 01 2024 - 11:15:10 EST

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Hi George,

kernel test robot noticed the following build warnings:

[auto build test WARNING on linus/master]
[also build test WARNING on v6.12-rc5 next-20241101]
[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#_base_tree_information]

url: https://github.com/intel-lab-lkp/linux/commits/George-Rurikov/nvme-rdma-Add-check-for-queue-in-nvmet_rdma_cm_handler/20241101-013611
base: linus/master
patch link: https://lore.kernel.org/r/20241031173327.663-1-grurikov%40gmail.com
patch subject: [PATCH] nvme: rdma: Add check for queue in nvmet_rdma_cm_handler()
config: s390-allmodconfig (https://download.01.org/0day-ci/archive/20241101/202411012252.e1ChG1dy-lkp@xxxxxxxxx/config)
compiler: clang version 20.0.0git (https://github.com/llvm/llvm-project 639a7ac648f1e50ccd2556e17d401c04f9cce625)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20241101/202411012252.e1ChG1dy-lkp@xxxxxxxxx/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@xxxxxxxxx>
| Closes: https://lore.kernel.org/oe-kbuild-all/202411012252.e1ChG1dy-lkp@xxxxxxxxx/

All warnings (new ones prefixed by >>):

In file included from drivers/nvme/target/rdma.c:8:
In file included from include/linux/blk-integrity.h:5:
In file included from include/linux/blk-mq.h:5:
In file included from include/linux/blkdev.h:9:
In file included from include/linux/blk_types.h:10:
In file included from include/linux/bvec.h:10:
In file included from include/linux/highmem.h:10:
In file included from include/linux/mm.h:2213:
include/linux/vmstat.h:504:43: warning: arithmetic between different enumeration types ('enum zone_stat_item' and 'enum numa_stat_item') [-Wenum-enum-conversion]
504 | return vmstat_text[NR_VM_ZONE_STAT_ITEMS +
| ~~~~~~~~~~~~~~~~~~~~~ ^
505 | item];
| ~~~~
include/linux/vmstat.h:511:43: warning: arithmetic between different enumeration types ('enum zone_stat_item' and 'enum numa_stat_item') [-Wenum-enum-conversion]
511 | return vmstat_text[NR_VM_ZONE_STAT_ITEMS +
| ~~~~~~~~~~~~~~~~~~~~~ ^
512 | NR_VM_NUMA_EVENT_ITEMS +
| ~~~~~~~~~~~~~~~~~~~~~~
include/linux/vmstat.h:518:36: warning: arithmetic between different enumeration types ('enum node_stat_item' and 'enum lru_list') [-Wenum-enum-conversion]
518 | return node_stat_name(NR_LRU_BASE + lru) + 3; // skip "nr_"
| ~~~~~~~~~~~ ^ ~~~
include/linux/vmstat.h:524:43: warning: arithmetic between different enumeration types ('enum zone_stat_item' and 'enum numa_stat_item') [-Wenum-enum-conversion]
524 | return vmstat_text[NR_VM_ZONE_STAT_ITEMS +
| ~~~~~~~~~~~~~~~~~~~~~ ^
525 | NR_VM_NUMA_EVENT_ITEMS +
| ~~~~~~~~~~~~~~~~~~~~~~
In file included from drivers/nvme/target/rdma.c:8:
In file included from include/linux/blk-integrity.h:5:
In file included from include/linux/blk-mq.h:8:
In file included from include/linux/scatterlist.h:9:
In file included from arch/s390/include/asm/io.h:95:
include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
548 | val = __raw_readb(PCI_IOBASE + addr);
| ~~~~~~~~~~ ^
include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
561 | val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
| ~~~~~~~~~~ ^
include/uapi/linux/byteorder/big_endian.h:37:59: note: expanded from macro '__le16_to_cpu'
37 | #define __le16_to_cpu(x) __swab16((__force __u16)(__le16)(x))
| ^
include/uapi/linux/swab.h:102:54: note: expanded from macro '__swab16'
102 | #define __swab16(x) (__u16)__builtin_bswap16((__u16)(x))
| ^
In file included from drivers/nvme/target/rdma.c:8:
In file included from include/linux/blk-integrity.h:5:
In file included from include/linux/blk-mq.h:8:
In file included from include/linux/scatterlist.h:9:
In file included from arch/s390/include/asm/io.h:95:
include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
574 | val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
| ~~~~~~~~~~ ^
include/uapi/linux/byteorder/big_endian.h:35:59: note: expanded from macro '__le32_to_cpu'
35 | #define __le32_to_cpu(x) __swab32((__force __u32)(__le32)(x))
| ^
include/uapi/linux/swab.h:115:54: note: expanded from macro '__swab32'
115 | #define __swab32(x) (__u32)__builtin_bswap32((__u32)(x))
| ^
In file included from drivers/nvme/target/rdma.c:8:
In file included from include/linux/blk-integrity.h:5:
In file included from include/linux/blk-mq.h:8:
In file included from include/linux/scatterlist.h:9:
In file included from arch/s390/include/asm/io.h:95:
include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
585 | __raw_writeb(value, PCI_IOBASE + addr);
| ~~~~~~~~~~ ^
include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
595 | __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
| ~~~~~~~~~~ ^
include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
605 | __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
| ~~~~~~~~~~ ^
include/asm-generic/io.h:693:20: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
693 | readsb(PCI_IOBASE + addr, buffer, count);
| ~~~~~~~~~~ ^
include/asm-generic/io.h:701:20: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
701 | readsw(PCI_IOBASE + addr, buffer, count);
| ~~~~~~~~~~ ^
include/asm-generic/io.h:709:20: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
709 | readsl(PCI_IOBASE + addr, buffer, count);
| ~~~~~~~~~~ ^
include/asm-generic/io.h:718:21: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
718 | writesb(PCI_IOBASE + addr, buffer, count);
| ~~~~~~~~~~ ^
include/asm-generic/io.h:727:21: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
727 | writesw(PCI_IOBASE + addr, buffer, count);
| ~~~~~~~~~~ ^
include/asm-generic/io.h:736:21: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
736 | writesl(PCI_IOBASE + addr, buffer, count);
| ~~~~~~~~~~ ^
>> drivers/nvme/target/rdma.c:1775:2: warning: unannotated fall-through between switch labels [-Wimplicit-fallthrough]
1775 | case RDMA_CM_EVENT_ADDR_CHANGE:
| ^
drivers/nvme/target/rdma.c:1775:2: note: insert '__attribute__((fallthrough));' to silence this warning
1775 | case RDMA_CM_EVENT_ADDR_CHANGE:
| ^
| __attribute__((fallthrough));
drivers/nvme/target/rdma.c:1775:2: note: insert 'break;' to avoid fall-through
1775 | case RDMA_CM_EVENT_ADDR_CHANGE:
| ^
| break;
drivers/nvme/target/rdma.c:1789:2: warning: unannotated fall-through between switch labels [-Wimplicit-fallthrough]
1789 | case RDMA_CM_EVENT_DEVICE_REMOVAL:
| ^
drivers/nvme/target/rdma.c:1789:2: note: insert '__attribute__((fallthrough));' to silence this warning
1789 | case RDMA_CM_EVENT_DEVICE_REMOVAL:
| ^
| __attribute__((fallthrough));
drivers/nvme/target/rdma.c:1789:2: note: insert 'break;' to avoid fall-through
1789 | case RDMA_CM_EVENT_DEVICE_REMOVAL:
| ^
| break;
drivers/nvme/target/rdma.c:1802:2: warning: unannotated fall-through between switch labels [-Wimplicit-fallthrough]
1802 | default:
| ^
drivers/nvme/target/rdma.c:1802:2: note: insert '__attribute__((fallthrough));' to silence this warning
1802 | default:
| ^
| __attribute__((fallthrough));
drivers/nvme/target/rdma.c:1802:2: note: insert 'break;' to avoid fall-through
1802 | default:
| ^
| break;
19 warnings generated.

vim +1775 drivers/nvme/target/rdma.c

d8f7750a08968b Sagi Grimberg 2016-05-19 1752
8f000cac6e7a6e Christoph Hellwig 2016-07-06 1753 static int nvmet_rdma_cm_handler(struct rdma_cm_id *cm_id,
8f000cac6e7a6e Christoph Hellwig 2016-07-06 1754 struct rdma_cm_event *event)
8f000cac6e7a6e Christoph Hellwig 2016-07-06 1755 {
8f000cac6e7a6e Christoph Hellwig 2016-07-06 1756 struct nvmet_rdma_queue *queue = NULL;
8f000cac6e7a6e Christoph Hellwig 2016-07-06 1757 int ret = 0;
8f000cac6e7a6e Christoph Hellwig 2016-07-06 1758
8f000cac6e7a6e Christoph Hellwig 2016-07-06 1759 if (cm_id->qp)
8f000cac6e7a6e Christoph Hellwig 2016-07-06 1760 queue = cm_id->qp->qp_context;
8f000cac6e7a6e Christoph Hellwig 2016-07-06 1761
8f000cac6e7a6e Christoph Hellwig 2016-07-06 1762 pr_debug("%s (%d): status %d id %p\n",
8f000cac6e7a6e Christoph Hellwig 2016-07-06 1763 rdma_event_msg(event->event), event->event,
8f000cac6e7a6e Christoph Hellwig 2016-07-06 1764 event->status, cm_id);
8f000cac6e7a6e Christoph Hellwig 2016-07-06 1765
8f000cac6e7a6e Christoph Hellwig 2016-07-06 1766 switch (event->event) {
8f000cac6e7a6e Christoph Hellwig 2016-07-06 1767 case RDMA_CM_EVENT_CONNECT_REQUEST:
8f000cac6e7a6e Christoph Hellwig 2016-07-06 1768 ret = nvmet_rdma_queue_connect(cm_id, event);
8f000cac6e7a6e Christoph Hellwig 2016-07-06 1769 break;
8f000cac6e7a6e Christoph Hellwig 2016-07-06 1770 case RDMA_CM_EVENT_ESTABLISHED:
554d31ea0a6334 MrRurikov 2024-10-31 1771 if (!queue) {
8f000cac6e7a6e Christoph Hellwig 2016-07-06 1772 nvmet_rdma_queue_established(queue);
8f000cac6e7a6e Christoph Hellwig 2016-07-06 1773 break;
554d31ea0a6334 MrRurikov 2024-10-31 1774 }
8f000cac6e7a6e Christoph Hellwig 2016-07-06 @1775 case RDMA_CM_EVENT_ADDR_CHANGE:
a032e4f6d60d0a Sagi Grimberg 2020-04-02 1776 if (!queue) {
a032e4f6d60d0a Sagi Grimberg 2020-04-02 1777 struct nvmet_rdma_port *port = cm_id->context;
a032e4f6d60d0a Sagi Grimberg 2020-04-02 1778
8832cf922151e9 Sagi Grimberg 2022-03-21 1779 queue_delayed_work(nvmet_wq, &port->repair_work, 0);
a032e4f6d60d0a Sagi Grimberg 2020-04-02 1780 break;
a032e4f6d60d0a Sagi Grimberg 2020-04-02 1781 }
df561f6688fef7 Gustavo A. R. Silva 2020-08-23 1782 fallthrough;
8f000cac6e7a6e Christoph Hellwig 2016-07-06 1783 case RDMA_CM_EVENT_DISCONNECTED:
8f000cac6e7a6e Christoph Hellwig 2016-07-06 1784 case RDMA_CM_EVENT_TIMEWAIT_EXIT:
554d31ea0a6334 MrRurikov 2024-10-31 1785 if (!queue) {
8f000cac6e7a6e Christoph Hellwig 2016-07-06 1786 nvmet_rdma_queue_disconnect(queue);
d8f7750a08968b Sagi Grimberg 2016-05-19 1787 break;
554d31ea0a6334 MrRurikov 2024-10-31 1788 }
d8f7750a08968b Sagi Grimberg 2016-05-19 1789 case RDMA_CM_EVENT_DEVICE_REMOVAL:
d8f7750a08968b Sagi Grimberg 2016-05-19 1790 ret = nvmet_rdma_device_removal(cm_id, queue);
8f000cac6e7a6e Christoph Hellwig 2016-07-06 1791 break;
8f000cac6e7a6e Christoph Hellwig 2016-07-06 1792 case RDMA_CM_EVENT_REJECTED:
512fb1b32bac02 Steve Wise 2016-10-26 1793 pr_debug("Connection rejected: %s\n",
512fb1b32bac02 Steve Wise 2016-10-26 1794 rdma_reject_msg(cm_id, event->status));
df561f6688fef7 Gustavo A. R. Silva 2020-08-23 1795 fallthrough;
8f000cac6e7a6e Christoph Hellwig 2016-07-06 1796 case RDMA_CM_EVENT_UNREACHABLE:
8f000cac6e7a6e Christoph Hellwig 2016-07-06 1797 case RDMA_CM_EVENT_CONNECT_ERROR:
554d31ea0a6334 MrRurikov 2024-10-31 1798 if (!queue) {
8f000cac6e7a6e Christoph Hellwig 2016-07-06 1799 nvmet_rdma_queue_connect_fail(cm_id, queue);
8f000cac6e7a6e Christoph Hellwig 2016-07-06 1800 break;
554d31ea0a6334 MrRurikov 2024-10-31 1801 }
8f000cac6e7a6e Christoph Hellwig 2016-07-06 1802 default:
8f000cac6e7a6e Christoph Hellwig 2016-07-06 1803 pr_err("received unrecognized RDMA CM event %d\n",
8f000cac6e7a6e Christoph Hellwig 2016-07-06 1804 event->event);
8f000cac6e7a6e Christoph Hellwig 2016-07-06 1805 break;
8f000cac6e7a6e Christoph Hellwig 2016-07-06 1806 }
8f000cac6e7a6e Christoph Hellwig 2016-07-06 1807
8f000cac6e7a6e Christoph Hellwig 2016-07-06 1808 return ret;
8f000cac6e7a6e Christoph Hellwig 2016-07-06 1809 }
8f000cac6e7a6e Christoph Hellwig 2016-07-06 1810

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