diff options
| author | Ira Weiny <ira.weiny@intel.com> | 2023-03-07 09:15:31 -0800 |
|---|---|---|
| committer | Leon Romanovsky <leon@kernel.org> | 2023-03-19 11:35:53 +0200 |
| commit | 6ea0c2de314fbaed8e10526c2284e992d145171d (patch) | |
| tree | 70b6b1322ca0953f7db31fa1ff250783d1b17c37 | |
| parent | d50b3c73f1ac20dabc53dc6e9d64ce9c79a331eb (diff) | |
RDMA/qib: Remove deprecated kmap() call
kmap() has been deprecated in favor of the kmap_local_page() call.
kmap_local_page() is thread local.
In the sdma coalesce case the page allocated is potentially free'ed in a
different context through qib_sdma_get_complete() ->
qib_user_sdma_make_progress(). The use of kmap_local_page() is
inappropriate in this call path. However, the page is allocated using
GFP_KERNEL and will never be from highmem.
Remove the use of kmap calls and use page_address() in this case.
Signed-off-by: Ira Weiny <ira.weiny@intel.com>
Link: https://lore.kernel.org/r/20230217-kmap-qib-v1-1-e5a6fde167e0@intel.com
Acked-by: Dennis Dalessandro <dennis.dalessandro@cornelisnetworks.com>
Signed-off-by: Leon Romanovsky <leon@kernel.org>
| -rw-r--r-- | drivers/infiniband/hw/qib/qib_user_sdma.c | 11 |
1 files changed, 3 insertions, 8 deletions
diff --git a/drivers/infiniband/hw/qib/qib_user_sdma.c b/drivers/infiniband/hw/qib/qib_user_sdma.c index 9fe03d6ffac1..336eb15a721f 100644 --- a/drivers/infiniband/hw/qib/qib_user_sdma.c +++ b/drivers/infiniband/hw/qib/qib_user_sdma.c @@ -320,7 +320,6 @@ static int qib_user_sdma_page_to_frags(const struct qib_devdata *dd, unpin_user_page(page); } else { /* coalesce case */ - kunmap(page); __free_page(page); } ret = -ENOMEM; @@ -572,7 +571,7 @@ static int qib_user_sdma_coalesce(const struct qib_devdata *dd, goto done; } - mpage = kmap(page); + mpage = page_address(page); mpage_save = mpage; for (i = 0; i < niov; i++) { int cfur; @@ -581,7 +580,7 @@ static int qib_user_sdma_coalesce(const struct qib_devdata *dd, iov[i].iov_base, iov[i].iov_len); if (cfur) { ret = -EFAULT; - goto free_unmap; + goto page_free; } mpage += iov[i].iov_len; @@ -592,8 +591,7 @@ static int qib_user_sdma_coalesce(const struct qib_devdata *dd, page, 0, 0, len, mpage_save); goto done; -free_unmap: - kunmap(page); +page_free: __free_page(page); done: return ret; @@ -627,9 +625,6 @@ static void qib_user_sdma_free_pkt_frag(struct device *dev, pkt->addr[i].dma_length, DMA_TO_DEVICE); - if (pkt->addr[i].kvaddr) - kunmap(pkt->addr[i].page); - if (pkt->addr[i].put_page) unpin_user_page(pkt->addr[i].page); else |