diff options
| author | Long Li <longli@microsoft.com> | 2018-09-20 21:18:39 +0000 |
|---|---|---|
| committer | Steve French <stfrench@microsoft.com> | 2018-10-23 21:16:05 -0500 |
| commit | ff526d86051f3689fe41e235ab962389d43999a9 (patch) | |
| tree | 3daf4db1a768703e292252f2ad4a9da07c589c62 /fs/cifs/smbdirect.c | |
| parent | 6d3adb23becb7b14995f6171c1d9f7f3baab1c79 (diff) | |
| download | linux-ff526d86051f3689fe41e235ab962389d43999a9.tar.bz2 | |
CIFS: SMBD: Do not call ib_dereg_mr on invalidated memory registration
It is not necessary to deregister a memory registration after it has been
successfully invalidated.
Signed-off-by: Long Li <longli@microsoft.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
Diffstat (limited to 'fs/cifs/smbdirect.c')
| -rw-r--r-- | fs/cifs/smbdirect.c | 38 |
1 files changed, 19 insertions, 19 deletions
diff --git a/fs/cifs/smbdirect.c b/fs/cifs/smbdirect.c index 5fdb9a509a97..5e282368cc4a 100644 --- a/fs/cifs/smbdirect.c +++ b/fs/cifs/smbdirect.c @@ -2295,8 +2295,12 @@ static void smbd_mr_recovery_work(struct work_struct *work) int rc; list_for_each_entry(smbdirect_mr, &info->mr_list, list) { - if (smbdirect_mr->state == MR_INVALIDATED || - smbdirect_mr->state == MR_ERROR) { + if (smbdirect_mr->state == MR_INVALIDATED) + ib_dma_unmap_sg( + info->id->device, smbdirect_mr->sgl, + smbdirect_mr->sgl_count, + smbdirect_mr->dir); + else if (smbdirect_mr->state == MR_ERROR) { /* recover this MR entry */ rc = ib_dereg_mr(smbdirect_mr->mr); @@ -2320,25 +2324,21 @@ static void smbd_mr_recovery_work(struct work_struct *work) smbd_disconnect_rdma_connection(info); continue; } + } else + /* This MR is being used, don't recover it */ + continue; - if (smbdirect_mr->state == MR_INVALIDATED) - ib_dma_unmap_sg( - info->id->device, smbdirect_mr->sgl, - smbdirect_mr->sgl_count, - smbdirect_mr->dir); - - smbdirect_mr->state = MR_READY; + smbdirect_mr->state = MR_READY; - /* smbdirect_mr->state is updated by this function - * and is read and updated by I/O issuing CPUs trying - * to get a MR, the call to atomic_inc_return - * implicates a memory barrier and guarantees this - * value is updated before waking up any calls to - * get_mr() from the I/O issuing CPUs - */ - if (atomic_inc_return(&info->mr_ready_count) == 1) - wake_up_interruptible(&info->wait_mr); - } + /* smbdirect_mr->state is updated by this function + * and is read and updated by I/O issuing CPUs trying + * to get a MR, the call to atomic_inc_return + * implicates a memory barrier and guarantees this + * value is updated before waking up any calls to + * get_mr() from the I/O issuing CPUs + */ + if (atomic_inc_return(&info->mr_ready_count) == 1) + wake_up_interruptible(&info->wait_mr); } } |