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NTB bug fixes to address a crash when unloading the ntb module, a DMA

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engine unmap leak, allowing the proper queue choice, and clearing the
 SKX irq bit.
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Merge tag 'ntb-4.10-bugfixes' of git://github.com/jonmason/ntb

Pull NTB bugfixes frfom Jon Mason:
 "NTB bug fixes to address a crash when unloading the ntb module, a DMA
  engine unmap leak, allowing the proper queue choice, and clearing the
  SKX irq bit"

* tag 'ntb-4.10-bugfixes' of git://github.com/jonmason/ntb:
  ntb: ntb_hw_intel: link_poll isn't clearing the pending status properly
  ntb_transport: Pick an unused queue
  ntb: ntb_perf missing dmaengine_unmap_put
  NTB: ntb_transport: fix debugfs_remove_recursive
This commit is contained in:
Linus Torvalds 2017-02-17 09:51:05 -08:00
commit 7ed1b12559
3 changed files with 27 additions and 4 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

24
drivers/ntb/hw/intel/ntb_hw_intel.c
View file

@ -1629,6 +1629,28 @@ static void atom_deinit_dev(struct intel_ntb_dev *ndev)
/* Skylake Xeon NTB */
static int skx_poll_link(struct intel_ntb_dev *ndev)
{
u16 reg_val;
int rc;
ndev->reg->db_iowrite(ndev->db_link_mask,
ndev->self_mmio +
ndev->self_reg->db_clear);
rc = pci_read_config_word(ndev->ntb.pdev,
SKX_LINK_STATUS_OFFSET, &reg_val);
if (rc)
return 0;
if (reg_val == ndev->lnk_sta)
return 0;
ndev->lnk_sta = reg_val;
return 1;
}
static u64 skx_db_ioread(void __iomem *mmio)
{
return ioread64(mmio);
@ -2852,7 +2874,7 @@ static struct intel_b2b_addr xeon_b2b_dsd_addr = {
};
static const struct intel_ntb_reg skx_reg = {
.poll_link = xeon_poll_link,
.poll_link = skx_poll_link,
.link_is_up = xeon_link_is_up,
.db_ioread = skx_db_ioread,
.db_iowrite = skx_db_iowrite,

5
drivers/ntb/ntb_transport.c
View file

@ -1802,7 +1802,7 @@ ntb_transport_create_queue(void *data, struct device *client_dev,
node = dev_to_node(&ndev->dev);
free_queue = ffs(nt->qp_bitmap);
free_queue = ffs(nt->qp_bitmap_free);
if (!free_queue)
goto err;
@ -2273,9 +2273,8 @@ module_init(ntb_transport_init);
static void __exit ntb_transport_exit(void)
{
debugfs_remove_recursive(nt_debugfs_dir);
ntb_unregister_client(&ntb_transport_client);
bus_unregister(&ntb_transport_bus);
debugfs_remove_recursive(nt_debugfs_dir);
}
module_exit(ntb_transport_exit);

2
drivers/ntb/test/ntb_perf.c
View file

@ -265,6 +265,8 @@ static ssize_t perf_copy(struct pthr_ctx *pctx, char __iomem *dst,
if (dma_submit_error(cookie))
goto err_set_unmap;
dmaengine_unmap_put(unmap);
atomic_inc(&pctx->dma_sync);
dma_async_issue_pending(chan);