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| author | Maarten Lankhorst <maarten.lankhorst@linux.intel.com> | 2024-05-28 23:21:34 +0300 |
|---|---|---|
| committer | Maarten Lankhorst <maarten.lankhorst@linux.intel.com> | 2024-05-28 23:21:34 +0300 |
| commit | f73a058be5d70dd81a43f16b2bbff4b1576a7af8 (patch) | |
| tree | b7959c01cf7a5d95c7c4d5b61929ff9123370322 /drivers/infiniband/core/user_mad.c | |
| parent | 6cb05d89fd62a76a9b74bd16211fb0930e89fea8 (diff) | |
| parent | 3e049b6b8f32f25c6967f4cffd8eac6e1e5316f6 (diff) | |
| download | linux-f73a058be5d70dd81a43f16b2bbff4b1576a7af8.tar.xz | |
Merge remote-tracking branch 'drm/drm-fixes' into drm-misc-fixes
v6.10-rc1 is released, forward from v6.9
Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Diffstat (limited to 'drivers/infiniband/core/user_mad.c')
| -rw-r--r-- | drivers/infiniband/core/user_mad.c | 21 |
1 files changed, 15 insertions, 6 deletions
diff --git a/drivers/infiniband/core/user_mad.c b/drivers/infiniband/core/user_mad.c index f5feca7fa9b9..2ed749f50a29 100644 --- a/drivers/infiniband/core/user_mad.c +++ b/drivers/infiniband/core/user_mad.c @@ -63,6 +63,8 @@ MODULE_AUTHOR("Roland Dreier"); MODULE_DESCRIPTION("InfiniBand userspace MAD packet access"); MODULE_LICENSE("Dual BSD/GPL"); +#define MAX_UMAD_RECV_LIST_SIZE 200000 + enum { IB_UMAD_MAX_PORTS = RDMA_MAX_PORTS, IB_UMAD_MAX_AGENTS = 32, @@ -113,6 +115,7 @@ struct ib_umad_file { struct mutex mutex; struct ib_umad_port *port; struct list_head recv_list; + atomic_t recv_list_size; struct list_head send_list; struct list_head port_list; spinlock_t send_lock; @@ -180,24 +183,28 @@ static struct ib_mad_agent *__get_agent(struct ib_umad_file *file, int id) return file->agents_dead ? NULL : file->agent[id]; } -static int queue_packet(struct ib_umad_file *file, - struct ib_mad_agent *agent, - struct ib_umad_packet *packet) +static int queue_packet(struct ib_umad_file *file, struct ib_mad_agent *agent, + struct ib_umad_packet *packet, bool is_recv_mad) { int ret = 1; mutex_lock(&file->mutex); + if (is_recv_mad && + atomic_read(&file->recv_list_size) > MAX_UMAD_RECV_LIST_SIZE) + goto unlock; + for (packet->mad.hdr.id = 0; packet->mad.hdr.id < IB_UMAD_MAX_AGENTS; packet->mad.hdr.id++) if (agent == __get_agent(file, packet->mad.hdr.id)) { list_add_tail(&packet->list, &file->recv_list); + atomic_inc(&file->recv_list_size); wake_up_interruptible(&file->recv_wait); ret = 0; break; } - +unlock: mutex_unlock(&file->mutex); return ret; @@ -224,7 +231,7 @@ static void send_handler(struct ib_mad_agent *agent, if (send_wc->status == IB_WC_RESP_TIMEOUT_ERR) { packet->length = IB_MGMT_MAD_HDR; packet->mad.hdr.status = ETIMEDOUT; - if (!queue_packet(file, agent, packet)) + if (!queue_packet(file, agent, packet, false)) return; } kfree(packet); @@ -284,7 +291,7 @@ static void recv_handler(struct ib_mad_agent *agent, rdma_destroy_ah_attr(&ah_attr); } - if (queue_packet(file, agent, packet)) + if (queue_packet(file, agent, packet, true)) goto err2; return; @@ -409,6 +416,7 @@ static ssize_t ib_umad_read(struct file *filp, char __user *buf, packet = list_entry(file->recv_list.next, struct ib_umad_packet, list); list_del(&packet->list); + atomic_dec(&file->recv_list_size); mutex_unlock(&file->mutex); @@ -421,6 +429,7 @@ static ssize_t ib_umad_read(struct file *filp, char __user *buf, /* Requeue packet */ mutex_lock(&file->mutex); list_add(&packet->list, &file->recv_list); + atomic_inc(&file->recv_list_size); mutex_unlock(&file->mutex); } else { if (packet->recv_wc) |