PCI: correct pcie_set_readrq write size

When setting the PCI-E MRRS, pcie_set_readrq queries the current
settings via a pci_read_config_word call but writes the modified result
via a pci_write_config_dword.  This results in writing 16 more bits than
were queried.

Also, the function description comment is slightly incorrect.

Signed-off-by: Jon Mason <jdmason@kudzu.us>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>

diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c
index d549bbc..08a95b3 100644 (file)
--- a/drivers/pci/pci.c
+++ b/drivers/pci/pci.c
@@ -3191,7 +3191,7 @@ EXPORT_SYMBOL(pcie_get_readrq);
  * @rq: maximum memory read count in bytes
  *    valid values are 128, 256, 512, 1024, 2048, 4096
  *
- * If possible sets maximum read byte count
+ * If possible sets maximum memory read request in bytes
  */
 int pcie_set_readrq(struct pci_dev *dev, int rq)
 {
@@ -3214,7 +3214,7 @@ int pcie_set_readrq(struct pci_dev *dev, int rq)
        if ((ctl & PCI_EXP_DEVCTL_READRQ) != v) {
                ctl &= ~PCI_EXP_DEVCTL_READRQ;
                ctl |= v;
-               err = pci_write_config_dword(dev, cap + PCI_EXP_DEVCTL, ctl);
+               err = pci_write_config_word(dev, cap + PCI_EXP_DEVCTL, ctl);
        }
 
 out: