diff options
| author |   Bernard Metzler <bmt@zurich.ibm.com> | 2019-09-09 15:29:45 +0200 |
|---|---|---|
| committer |   Jason Gunthorpe <jgg@mellanox.com> | 2019-09-13 16:59:55 -0300 |
| commit | 4db8fd4973329810c8549b08df12907e6fe921c2 (patch) | |
| tree | 2b5e0ed06fc693ee76f2ede3a82ab035df507ea7 /drivers/infiniband/sw/siw/siw_qp_tx.c | |
| parent | Merge tag 'v5.3-rc8' into rdma.git for-next (diff) | |
| download | linux-dev-4db8fd4973329810c8549b08df12907e6fe921c2.tar.xz linux-dev-4db8fd4973329810c8549b08df12907e6fe921c2.zip | |
RDMA/siw: Relax from kmap_atomic() use in TX path
Since the transmit path is never executed in an atomic context, we do not
need kmap_atomic() and can always use less demanding kmap().
Link: https://lore.kernel.org/r/20190909132945.30462-1-bmt@zurich.ibm.com
Signed-off-by: Bernard Metzler <bmt@zurich.ibm.com>
Reviewed-by: Jason Gunthorpe <jgg@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Diffstat (limited to 'drivers/infiniband/sw/siw/siw_qp_tx.c')
| -rw-r--r-- | drivers/infiniband/sw/siw/siw_qp_tx.c | 12 |
1 files changed, 5 insertions, 7 deletions
diff --git a/drivers/infiniband/sw/siw/siw_qp_tx.c b/drivers/infiniband/sw/siw/siw_qp_tx.c index 8e72f955921d..5d97bba0ce6d 100644 --- a/drivers/infiniband/sw/siw/siw_qp_tx.c +++ b/drivers/infiniband/sw/siw/siw_qp_tx.c @@ -76,16 +76,15 @@ static int siw_try_1seg(struct siw_iwarp_tx *c_tx, void *paddr) if (unlikely(!p)) return -EFAULT; - buffer = kmap_atomic(p); + buffer = kmap(p); if (likely(PAGE_SIZE - off >= bytes)) { memcpy(paddr, buffer + off, bytes); - kunmap_atomic(buffer); } else { unsigned long part = bytes - (PAGE_SIZE - off); memcpy(paddr, buffer + off, part); - kunmap_atomic(buffer); + kunmap(p); if (!mem->is_pbl) p = siw_get_upage(mem->umem, @@ -97,11 +96,10 @@ static int siw_try_1seg(struct siw_iwarp_tx *c_tx, void *paddr) if (unlikely(!p)) return -EFAULT; - buffer = kmap_atomic(p); - memcpy(paddr + part, buffer, - bytes - part); - kunmap_atomic(buffer); + buffer = kmap(p); + memcpy(paddr + part, buffer, bytes - part); } + kunmap(p); } } return (int)bytes; |