PCI: read-modify-write the pcie device control register when initiating pcie flr

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The pcie_flr routine writes the device control register with the FLR bit
set clearing all other fields for the FLR duration. Among other fields,
the Max_Payload_Size is also cleared which can cause errors if there are
transactions lurking in the HW pipeline. The patch replaces the blank
write with read-modify-write of the control register keeping the other
fields intact.

Signed-off-by: Shmulik Ravid <shmulikr@broadcom.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>

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Shmulik Ravid 2009-12-03 22:27:51 +02:00 • committed by Jesse Barnes

parent bb965401fd

commit 04b55c4732

1 changed files with 5 additions and 3 deletions

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8

drivers/pci/pci.c

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