tile: use PCI define for Max_Read_Request_Size

Replace a magic number with a PCI #define symbol.

Signed-off-by: Rafał Miłecki <zajec5@gmail.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Chris Metcalf <cmetcalf@ezchip.com>

diff --git a/arch/tile/kernel/pci.c b/arch/tile/kernel/pci.c
index f70c7892fa2577b56b64c14c505edb187ab2a948..325df47f114db5c76333b01c2e5c9705662d4c19 100644 (file)
--- a/arch/tile/kernel/pci.c
+++ b/arch/tile/kernel/pci.c
@@ -245,7 +245,7 @@ static void fixup_read_and_payload_sizes(void)
 {
        struct pci_dev *dev = NULL;
        int smallest_max_payload = 0x1; /* Tile maxes out at 256 bytes. */
-       int max_read_size = 0x2; /* Limit to 512 byte reads. */
+       int max_read_size = PCI_EXP_DEVCTL_READRQ_512B;
        u16 new_values;
 
        /* Scan for the smallest maximum payload size. */
@@ -258,7 +258,7 @@ static void fixup_read_and_payload_sizes(void)
        }
 
        /* Now, set the max_payload_size for all devices to that value. */
-       new_values = (max_read_size << 12) | (smallest_max_payload << 5);
+       new_values = max_read_size | (smallest_max_payload << 5);
        for_each_pci_dev(dev)
                pcie_capability_clear_and_set_word(dev, PCI_EXP_DEVCTL,
                                PCI_EXP_DEVCTL_PAYLOAD | PCI_EXP_DEVCTL_READRQ,