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authorJim Dickerson <jim.dickerson@hpe.com>2017-09-18 17:39:14 +0300
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2017-09-18 17:10:41 +0200
commit114ec3a6f9096d211a4aff4277793ba969a62c73 (patch)
treeea108e6e74f16bd5ed5e335b0a61c0c2ced6e5be /drivers/usb/host
parent5a838a13c9b4e5dd188b7a6eaeb894e9358ead0c (diff)
usb: pci-quirks.c: Corrected timeout values used in handshake
Servers were emitting failed handoff messages but were not waiting the full 1 second as designated in section 4.22.1 of the eXtensible Host Controller Interface specifications. The handshake was using wrong units so calls were made with milliseconds not microseconds. Comments referenced 5 seconds not 1 second as in specs. The wrong units were also corrected in a second handshake call. Cc: <stable@vger.kernel.org> Signed-off-by: Jim Dickerson <jim.dickerson@hpe.com> Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/usb/host')
-rw-r--r--drivers/usb/host/pci-quirks.c8
1 files changed, 4 insertions, 4 deletions
diff --git a/drivers/usb/host/pci-quirks.c b/drivers/usb/host/pci-quirks.c
index 658d9d1f9ea3..e02dbb1e1cdd 100644
--- a/drivers/usb/host/pci-quirks.c
+++ b/drivers/usb/host/pci-quirks.c
@@ -1022,7 +1022,7 @@ EXPORT_SYMBOL_GPL(usb_disable_xhci_ports);
*
* Takes care of the handoff between the Pre-OS (i.e. BIOS) and the OS.
* It signals to the BIOS that the OS wants control of the host controller,
- * and then waits 5 seconds for the BIOS to hand over control.
+ * and then waits 1 second for the BIOS to hand over control.
* If we timeout, assume the BIOS is broken and take control anyway.
*/
static void quirk_usb_handoff_xhci(struct pci_dev *pdev)
@@ -1069,9 +1069,9 @@ static void quirk_usb_handoff_xhci(struct pci_dev *pdev)
if (val & XHCI_HC_BIOS_OWNED) {
writel(val | XHCI_HC_OS_OWNED, base + ext_cap_offset);
- /* Wait for 5 seconds with 10 microsecond polling interval */
+ /* Wait for 1 second with 10 microsecond polling interval */
timeout = handshake(base + ext_cap_offset, XHCI_HC_BIOS_OWNED,
- 0, 5000, 10);
+ 0, 1000000, 10);
/* Assume a buggy BIOS and take HC ownership anyway */
if (timeout) {
@@ -1100,7 +1100,7 @@ hc_init:
* operational or runtime registers. Wait 5 seconds and no more.
*/
timeout = handshake(op_reg_base + XHCI_STS_OFFSET, XHCI_STS_CNR, 0,
- 5000, 10);
+ 5000000, 10);
/* Assume a buggy HC and start HC initialization anyway */
if (timeout) {
val = readl(op_reg_base + XHCI_STS_OFFSET);