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NFS-over-RDMA client fixes for Linux 4.16 #2

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Stable fixes:
 - Fix calculating ri_max_send_sges, which can oops if max_sge is too small
 - Fix a BUG after device removal if freed resources haven't been allocated yet
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Merge tag 'nfs-rdma-for-4.16-2' of git://git.linux-nfs.org/projects/anna/linux-nfs

NFS-over-RDMA client fixes for Linux 4.16 #2

Stable fixes:
- Fix calculating ri_max_send_sges, which can oops if max_sge is too small
- Fix a BUG after device removal if freed resources haven't been allocated yet
This commit is contained in:
Trond Myklebust 2018-02-06 16:06:27 -05:00
commit 0c8cbcd337
2 changed files with 5 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
net/sunrpc/xprtrdma/rpc_rdma.c
View File

@ -143,7 +143,7 @@ static bool rpcrdma_args_inline(struct rpcrdma_xprt *r_xprt,
if (xdr->page_len) {
remaining = xdr->page_len;
offset = offset_in_page(xdr->page_base);
count = 0;
count = RPCRDMA_MIN_SEND_SGES;
while (remaining) {
remaining -= min_t(unsigned int,
PAGE_SIZE - offset, remaining);

8
net/sunrpc/xprtrdma/verbs.c
View File

@ -505,7 +505,7 @@ rpcrdma_ep_create(struct rpcrdma_ep *ep, struct rpcrdma_ia *ia,
pr_warn("rpcrdma: HCA provides only %d send SGEs\n", max_sge);
return -ENOMEM;
}
ia->ri_max_send_sges = max_sge - RPCRDMA_MIN_SEND_SGES;
ia->ri_max_send_sges = max_sge;
if (ia->ri_device->attrs.max_qp_wr <= RPCRDMA_BACKWARD_WRS) {
dprintk("RPC: %s: insufficient wqe's available\n",
@ -1502,6 +1502,9 @@ __rpcrdma_dma_map_regbuf(struct rpcrdma_ia *ia, struct rpcrdma_regbuf *rb)
static void
rpcrdma_dma_unmap_regbuf(struct rpcrdma_regbuf *rb)
{
if (!rb)
return;
if (!rpcrdma_regbuf_is_mapped(rb))
return;
@ -1517,9 +1520,6 @@ rpcrdma_dma_unmap_regbuf(struct rpcrdma_regbuf *rb)
void
rpcrdma_free_regbuf(struct rpcrdma_regbuf *rb)
{
if (!rb)
return;
rpcrdma_dma_unmap_regbuf(rb);
kfree(rb);
}