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[PATCH] ixgbe: use msleep for long delays

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From Arnd Bergmann <arnd@arndb.de>
Newsgroups linux.kernel
Subject [PATCH] ixgbe: use msleep for long delays
Date Sat, 16 Apr 2016 22:40:01 +0200
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X-Original-To Jeff Kirsher <jeffrey.t.kirsher@intel.com>
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X-Original-Cc Arnd Bergmann <arnd@arndb.de>, Jesse Brandeburg <jesse.brandeburg@intel.com>, Shannon Nelson <shannon.nelson@intel.com>, Carolyn Wyborny <carolyn.wyborny@intel.com>, Don Skidmore <donald.c.skidmore@intel.com>, Bruce Allan <bruce.w.allan@intel.com>, John Ronciak <john.ronciak@intel.com>, Mitch Williams <mitch.a.williams@intel.com>, Mark Rustad <mark.d.rustad@intel.com>, intel-wired-lan@lists.osuosl.org, netdev@vger.kernel.org, linux-kernel@vger.kernel.org
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The newly added x550em_a support causes a link failure on ARM because of
an overly long time passed into udelay():

ERROR: "__bad_udelay" [drivers/net/ethernet/intel/ixgbe/ixgbe.ko] undefined!

There are multiple variants of the ixgbe_acquire_swfw_sync_*() function,
and the other ones all use msleep(), so we can safely assume that all
callers are allowed to sleep, which makes msleep() a better replacement
than mdelay().

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Fixes: 49425dfc7451 ("ixgbe: Add support for x550em_a 10G MAC type")
---
 drivers/net/ethernet/intel/ixgbe/ixgbe_x550.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_x550.c b/drivers/net/ethernet/intel/ixgbe/ixgbe_x550.c
index c71e93ed4451..21c0fce47e15 100644
--- a/drivers/net/ethernet/intel/ixgbe/ixgbe_x550.c
+++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_x550.c
@@ -2765,7 +2765,7 @@ static s32 ixgbe_acquire_swfw_sync_x550em_a(struct ixgbe_hw *hw, u32 mask)
 			ixgbe_release_swfw_sync_X540(hw, hmask);
 		if (status != IXGBE_ERR_TOKEN_RETRY)
 			return status;
-		udelay(FW_PHY_TOKEN_DELAY * 1000);
+		msleep(FW_PHY_TOKEN_DELAY);
 	}
 
 	return status;
-- 
2.7.0

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Thread

[PATCH] ixgbe: use msleep for long delays Arnd Bergmann <arnd@arndb.de> - 2016-04-16 22:40 +0200
  Re: [PATCH] ixgbe: use msleep for long delays David Miller <davem@davemloft.net> - 2016-04-18 06:10 +0200

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