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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>
This commit is contained in:
Jon Mason 2011-06-28 18:26:25 -05:00 committed by Jesse Barnes
parent 0cab0841dc
commit c9b378c7cb
1 changed files with 2 additions and 2 deletions
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4
drivers/pci/pci.c
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@ -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: