mlx5: Keep polling to reclaim pages while any returned

Change mlx5_reclaim_startup_pages() to keep polling while any pages
are returned.  If none are returned, keep polling for five more seconds
before exiting with an error message.

Signed-off-by: Eli Cohen <eli@mellanox.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/pagealloc.c b/drivers/net/ethernet/mellanox/mlx5/core/pagealloc.c
index 3a2408d..7b12acf 100644 (file)
--- a/drivers/net/ethernet/mellanox/mlx5/core/pagealloc.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/pagealloc.c
@@ -90,6 +90,10 @@ struct mlx5_manage_pages_outbox {
        __be64                  pas[0];
 };
 
+enum {
+       MAX_RECLAIM_TIME_MSECS  = 5000,
+};
+
 static int insert_page(struct mlx5_core_dev *dev, u64 addr, struct page *page, u16 func_id)
 {
        struct rb_root *root = &dev->priv.page_root;
@@ -279,6 +283,9 @@ static int reclaim_pages(struct mlx5_core_dev *dev, u32 func_id, int npages,
        int err;
        int i;
 
+       if (nclaimed)
+               *nclaimed = 0;
+
        memset(&in, 0, sizeof(in));
        outlen = sizeof(*out) + npages * sizeof(out->pas[0]);
        out = mlx5_vzalloc(outlen);
@@ -388,20 +395,25 @@ static int optimal_reclaimed_pages(void)
 
 int mlx5_reclaim_startup_pages(struct mlx5_core_dev *dev)
 {
-       unsigned long end = jiffies + msecs_to_jiffies(5000);
+       unsigned long end = jiffies + msecs_to_jiffies(MAX_RECLAIM_TIME_MSECS);
        struct fw_page *fwp;
        struct rb_node *p;
+       int nclaimed = 0;
        int err;
 
        do {
                p = rb_first(&dev->priv.page_root);
                if (p) {
                        fwp = rb_entry(p, struct fw_page, rb_node);
-                       err = reclaim_pages(dev, fwp->func_id, optimal_reclaimed_pages(), NULL);
+                       err = reclaim_pages(dev, fwp->func_id,
+                                           optimal_reclaimed_pages(),
+                                           &nclaimed);
                        if (err) {
                                mlx5_core_warn(dev, "failed reclaiming pages (%d)\n", err);
                                return err;
                        }
+                       if (nclaimed)
+                               end = jiffies + msecs_to_jiffies(MAX_RECLAIM_TIME_MSECS);
                }
                if (time_after(jiffies, end)) {
                        mlx5_core_warn(dev, "FW did not return all pages. giving up...\n");