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mptcp: refine memory scheduling

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commit 69d93daec026cdda98e29e8edb12534bfa5b1a9b upstream.

Similar to commit 7c80b038d23e ("net: fix sk_wmem_schedule() and
sk_rmem_schedule() errors"), let the MPTCP receive path schedule
exactly the required amount of memory.

Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Paolo Abeni 2022-06-30 15:17:56 -07:00 committed by Greg Kroah-Hartman
parent d729f0ee99
commit af37d2080c
1 changed files with 2 additions and 1 deletions
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3
net/mptcp/protocol.c
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@ -323,9 +323,10 @@ static bool mptcp_rmem_schedule(struct sock *sk, struct sock *ssk, int size)
struct mptcp_sock *msk = mptcp_sk(sk);
int amt, amount;
if (size < msk->rmem_fwd_alloc)
if (size <= msk->rmem_fwd_alloc)
return true;
size -= msk->rmem_fwd_alloc;
amt = sk_mem_pages(size);
amount = amt << SK_MEM_QUANTUM_SHIFT;
msk->rmem_fwd_alloc += amount;