Messages in this thread Patch in this message | | | Date | Wed, 29 Apr 2009 15:07:43 -0700 | From | Greg KH <> | Subject | [patch 44/58] r8169: reset IntrStatus after chip reset |
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2.6.27-stable review patch. If anyone has any objections, please let us know.
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From: Francois Romieu <romieu@fr.zoreil.com>
Upstream as d78ad8cbfe73ad568de38814a75e9c92ad0a907c (post 2.6.29).
Original comment (Karsten): On a MSI MS-6702E mainboard, when in rtl8169_init_one() for the first time after BIOS has run, IntrStatus reads 5 after chip has been reset. IntrStatus should equal 0 there, so patch changes IntrStatus reset to happen after chip reset instead of before.
Remark (Francois): Assuming that the loglevel of the driver is increased above NETIF_MSG_INTR, the bug reveals itself with a typical "interrupt 0025 in poll" message at startup. In retrospect, the message should had been read as an hint of an unexpected hardware state several months ago :o(
Fixes (at least part of) https://bugzilla.redhat.com/show_bug.cgi?id=460747
Signed-off-by: Karsten Wiese <fzu@wemgehoertderstaat.de> Signed-off-by: Francois Romieu <romieu@fr.zoreil.com> Tested-by: Josep <josep.puigdemont@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
--- drivers/net/r8169.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-)
--- a/drivers/net/r8169.c +++ b/drivers/net/r8169.c @@ -1687,8 +1687,7 @@ rtl8169_init_one(struct pci_dev *pdev, c goto err_out_free_res_4; } - /* Unneeded ? Don't mess with Mrs. Murphy. */ - rtl8169_irq_mask_and_ack(ioaddr); + RTL_W16(IntrMask, 0x0000); /* Soft reset the chip. */ RTL_W8(ChipCmd, CmdReset); @@ -1700,6 +1699,8 @@ rtl8169_init_one(struct pci_dev *pdev, c msleep_interruptible(1); } + RTL_W16(IntrStatus, 0xffff); + /* Identify chip attached to board */ rtl8169_get_mac_version(tp, ioaddr);
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