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| author |   Michael J. Ruhl <michael.j.ruhl@intel.com> | 2017-07-24 07:45:43 -0700 |
|---|---|---|
| committer |   Doug Ledford <dledford@redhat.com> | 2017-07-31 15:17:54 -0400 |
| commit | 42492011ab23f44c63dad0c7096492313dc207e3 (patch) | |
| tree | 4745781a978dbd6ba25dd2ef1ec532e89c59ac22 /drivers | |
| parent | IB/hfi1: Serve the most starved iowait entry first (diff) | |
| download | linux-dev-42492011ab23f44c63dad0c7096492313dc207e3.tar.xz linux-dev-42492011ab23f44c63dad0c7096492313dc207e3.zip | |
IB/hfi1: Assign context does not clean up file descriptor correctly on error
In the error path for context allocation, the file descriptor pointer
should not point to a context when an error occurs.
Clean up the appropriate references on error.
Fixes: Commit 62239fc6e5545b2e59f83dfbc5db231a81f37a45 ("IB/hfi1: Clean up on context initialization failure")
Reviewed-by: Ira Weiny <ira.weiny@intel.com>
Signed-off-by: Michael J. Ruhl <michael.j.ruhl@intel.com>
Signed-off-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/infiniband/hw/hfi1/file_ops.c | 37 |
1 files changed, 26 insertions, 11 deletions
diff --git a/drivers/infiniband/hw/hfi1/file_ops.c b/drivers/infiniband/hw/hfi1/file_ops.c index fbf52841aea4..d36e17722e6d 100644 --- a/drivers/infiniband/hw/hfi1/file_ops.c +++ b/drivers/infiniband/hw/hfi1/file_ops.c @@ -94,6 +94,7 @@ static int find_sub_ctxt(struct hfi1_filedata *fd, const struct hfi1_user_info *uinfo); static int allocate_ctxt(struct hfi1_filedata *fd, struct hfi1_devdata *dd, struct hfi1_user_info *uinfo); +static void deallocate_ctxt(struct hfi1_ctxtdata *uctxt); static unsigned int poll_urgent(struct file *fp, struct poll_table_struct *pt); static unsigned int poll_next(struct file *fp, struct poll_table_struct *pt); static int user_event_ack(struct hfi1_ctxtdata *uctxt, u16 subctxt, @@ -813,15 +814,9 @@ static int hfi1_file_close(struct inode *inode, struct file *fp) uctxt->rcvnowait = 0; uctxt->pionowait = 0; uctxt->event_flags = 0; - - hfi1_stats.sps_ctxts--; - if (++dd->freectxts == dd->num_user_contexts) - aspm_enable_all(dd); - - /* _rcd_put() should be done after releasing mutex */ - dd->rcd[uctxt->ctxt] = NULL; mutex_unlock(&hfi1_mutex); - hfi1_rcd_put(uctxt); /* dd reference */ + + deallocate_ctxt(uctxt); done: mmdrop(fdata->mm); kobject_put(&dd->kobj); @@ -898,10 +893,9 @@ static int assign_ctxt(struct hfi1_filedata *fd, struct hfi1_user_info *uinfo) if (!ret) ret = init_user_ctxt(fd); - if (ret) { + if (ret) clear_bit(fd->subctxt, fd->uctxt->in_use_ctxts); - hfi1_rcd_put(fd->uctxt); - } + } else if (!ret) { ret = setup_base_ctxt(fd); if (fd->uctxt->subctxt_cnt) { @@ -917,6 +911,14 @@ static int assign_ctxt(struct hfi1_filedata *fd, struct hfi1_user_info *uinfo) &fd->uctxt->event_flags); wake_up(&fd->uctxt->wait); } + if (ret) + deallocate_ctxt(fd->uctxt); + } + + /* If an error occurred, clear the reference */ + if (ret && fd->uctxt) { + hfi1_rcd_put(fd->uctxt); + fd->uctxt = NULL; } return ret; @@ -1087,6 +1089,19 @@ ctxdata_free: return ret; } +static void deallocate_ctxt(struct hfi1_ctxtdata *uctxt) +{ + mutex_lock(&hfi1_mutex); + hfi1_stats.sps_ctxts--; + if (++uctxt->dd->freectxts == uctxt->dd->num_user_contexts) + aspm_enable_all(uctxt->dd); + + /* _rcd_put() should be done after releasing mutex */ + uctxt->dd->rcd[uctxt->ctxt] = NULL; + mutex_unlock(&hfi1_mutex); + hfi1_rcd_put(uctxt); /* dd reference */ +} + static int init_subctxts(struct hfi1_ctxtdata *uctxt, const struct hfi1_user_info *uinfo) { |