[mkp-scsi:for-next 67/132] drivers/scsi/elx/libefc/efc_els.c:73 efc_els_io_alloc_size() warn: sleeping in atomic context

From: Dan Carpenter
Date: Mon Jan 10 2022 - 02:03:05 EST

tree: https://git.kernel.org/pub/scm/linux/kernel/git/mkp/scsi.git for-next
head: 315d049ad1951cef02d9337a2469cac51cca6932
commit: efac162a4e4dc4cebcc658e02676821ca834b56c [67/132] scsi: efct: Don't pass GFP_DMA to dma_alloc_coherent()
config: x86_64-randconfig-m031-20220107 (https://download.01.org/0day-ci/archive/20220108/202201082354.iAG3UuiL-lkp@xxxxxxxxx/config)
compiler: gcc-9 (Debian 9.3.0-22) 9.3.0

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

smatch warnings:
drivers/scsi/elx/libefc/efc_els.c:73 efc_els_io_alloc_size() warn: sleeping in atomic context

vim +73 drivers/scsi/elx/libefc/efc_els.c

8f406ef728597d James Smart 2021-06-01 40 struct efc_els_io_req *
8f406ef728597d James Smart 2021-06-01 41 efc_els_io_alloc_size(struct efc_node *node, u32 reqlen, u32 rsplen)
8f406ef728597d James Smart 2021-06-01 42 {
8f406ef728597d James Smart 2021-06-01 43 struct efc *efc;
8f406ef728597d James Smart 2021-06-01 44 struct efc_els_io_req *els;
8f406ef728597d James Smart 2021-06-01 45 unsigned long flags = 0;
8f406ef728597d James Smart 2021-06-01 46
8f406ef728597d James Smart 2021-06-01 47 efc = node->efc;
8f406ef728597d James Smart 2021-06-01 48
8f406ef728597d James Smart 2021-06-01 49 spin_lock_irqsave(&node->els_ios_lock, flags);
^^^^^^^^^^^^^^^^^

8f406ef728597d James Smart 2021-06-01 50
8f406ef728597d James Smart 2021-06-01 51 if (!node->els_io_enabled) {
8f406ef728597d James Smart 2021-06-01 52 efc_log_err(efc, "els io alloc disabled\n");
8f406ef728597d James Smart 2021-06-01 53 spin_unlock_irqrestore(&node->els_ios_lock, flags);
8f406ef728597d James Smart 2021-06-01 54 return NULL;
8f406ef728597d James Smart 2021-06-01 55 }
8f406ef728597d James Smart 2021-06-01 56
8f406ef728597d James Smart 2021-06-01 57 els = mempool_alloc(efc->els_io_pool, GFP_ATOMIC);
8f406ef728597d James Smart 2021-06-01 58 if (!els) {
8f406ef728597d James Smart 2021-06-01 59 atomic_add_return(1, &efc->els_io_alloc_failed_count);
8f406ef728597d James Smart 2021-06-01 60 spin_unlock_irqrestore(&node->els_ios_lock, flags);
8f406ef728597d James Smart 2021-06-01 61 return NULL;
8f406ef728597d James Smart 2021-06-01 62 }
8f406ef728597d James Smart 2021-06-01 63
8f406ef728597d James Smart 2021-06-01 64 /* initialize refcount */
8f406ef728597d James Smart 2021-06-01 65 kref_init(&els->ref);
8f406ef728597d James Smart 2021-06-01 66 els->release = _efc_els_io_free;
8f406ef728597d James Smart 2021-06-01 67
8f406ef728597d James Smart 2021-06-01 68 /* populate generic io fields */
8f406ef728597d James Smart 2021-06-01 69 els->node = node;
8f406ef728597d James Smart 2021-06-01 70
8f406ef728597d James Smart 2021-06-01 71 /* now allocate DMA for request and response */
8f406ef728597d James Smart 2021-06-01 72 els->io.req.size = reqlen;
8f406ef728597d James Smart 2021-06-01 @73 els->io.req.virt = dma_alloc_coherent(&efc->pci->dev, els->io.req.size,
efac162a4e4dc4 Christoph Hellwig 2021-12-14 74 &els->io.req.phys, GFP_KERNEL);
^^^^^^^^^^
Sleeping in spin lock

8f406ef728597d James Smart 2021-06-01 75 if (!els->io.req.virt) {
8f406ef728597d James Smart 2021-06-01 76 mempool_free(els, efc->els_io_pool);
8f406ef728597d James Smart 2021-06-01 77 spin_unlock_irqrestore(&node->els_ios_lock, flags);
8f406ef728597d James Smart 2021-06-01 78 return NULL;
8f406ef728597d James Smart 2021-06-01 79 }
8f406ef728597d James Smart 2021-06-01 80
8f406ef728597d James Smart 2021-06-01 81 els->io.rsp.size = rsplen;
8f406ef728597d James Smart 2021-06-01 82 els->io.rsp.virt = dma_alloc_coherent(&efc->pci->dev, els->io.rsp.size,
efac162a4e4dc4 Christoph Hellwig 2021-12-14 83 &els->io.rsp.phys, GFP_KERNEL);
^^^^^^^^^^
Same

8f406ef728597d James Smart 2021-06-01 84 if (!els->io.rsp.virt) {
8f406ef728597d James Smart 2021-06-01 85 dma_free_coherent(&efc->pci->dev, els->io.req.size,
8f406ef728597d James Smart 2021-06-01 86 els->io.req.virt, els->io.req.phys);
8f406ef728597d James Smart 2021-06-01 87 mempool_free(els, efc->els_io_pool);
8f406ef728597d James Smart 2021-06-01 88 els = NULL;
8f406ef728597d James Smart 2021-06-01 89 }
8f406ef728597d James Smart 2021-06-01 90
8f406ef728597d James Smart 2021-06-01 91 if (els) {
8f406ef728597d James Smart 2021-06-01 92 /* initialize fields */
8f406ef728597d James Smart 2021-06-01 93 els->els_retries_remaining = EFC_FC_ELS_DEFAULT_RETRIES;
8f406ef728597d James Smart 2021-06-01 94
8f406ef728597d James Smart 2021-06-01 95 /* add els structure to ELS IO list */
8f406ef728597d James Smart 2021-06-01 96 INIT_LIST_HEAD(&els->list_entry);
8f406ef728597d James Smart 2021-06-01 97 list_add_tail(&els->list_entry, &node->els_ios_list);
8f406ef728597d James Smart 2021-06-01 98 }
8f406ef728597d James Smart 2021-06-01 99
8f406ef728597d James Smart 2021-06-01 100 spin_unlock_irqrestore(&node->els_ios_lock, flags);
8f406ef728597d James Smart 2021-06-01 101 return els;
8f406ef728597d James Smart 2021-06-01 102 }

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx