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authorEli Cohen <eli@mellanox.co.il>2007-08-13 17:57:03 +0300
committerRoland Dreier <rolandd@cisco.com>2007-08-13 08:47:44 -0700
commit947b2a8083a03e6fff448ce8928956015614855e (patch)
treea5dc653181c0029c11c2d45ac417c67a15573b21 /drivers/net
parent6958e827f187c9c5cd39af075567f74f02bf3dd1 (diff)
mlx4_core: Wait 1 second after reset before accessing device
Put a 1000 msec delay after resetting the device before attempting to do config cycles on it. Not waiting causes system hangs on some chipsets, e.g. Intel E7520, when the driver is loaded. Signed-off-by: Eli Cohen <eli@mellanox.co.il> Signed-off-by: Roland Dreier <rolandd@cisco.com>
Diffstat (limited to 'drivers/net')
-rw-r--r--drivers/net/mlx4/reset.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/net/mlx4/reset.c b/drivers/net/mlx4/reset.c
index e4dfd4b11a4..e199715fabd 100644
--- a/drivers/net/mlx4/reset.c
+++ b/drivers/net/mlx4/reset.c
@@ -119,6 +119,9 @@ int mlx4_reset(struct mlx4_dev *dev)
writel(MLX4_RESET_VALUE, reset + MLX4_RESET_OFFSET);
iounmap(reset);
+ /* Docs say to wait one second before accessing device */
+ msleep(1000);
+
end = jiffies + MLX4_RESET_TIMEOUT_JIFFIES;
do {
if (!pci_read_config_word(dev->pdev, PCI_VENDOR_ID, &vendor) &&