Commit 947b2a80 authored Aug 13, 2007 by Eli Cohen Committed by Roland Dreier Aug 13, 2007

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>

parent 6958e827

drivers/net/mlx4/reset.c

+3 −0

Original line number	Diff line number	Diff line
		@@ -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) &&

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