From 58faf07b76817782ea20c392639569ea613cd439 Mon Sep 17 00:00:00 2001 From: Juergen Gross Date: Mon, 31 Oct 2016 14:58:41 +0100 Subject: [PATCH] xen: make use of xenbus_read_unsigned() in xen-pcifront Use xenbus_read_unsigned() instead of xenbus_scanf() when possible. This requires to change the type of the read from int to unsigned, but this case has been wrong before: negative values are not allowed for the modified case. Cc: bhelgaas@google.com Cc: linux-pci@vger.kernel.org Signed-off-by: Juergen Gross Acked-by: Bjorn Helgaas Acked-by: David Vrabel --- drivers/pci/xen-pcifront.c | 6 ++---- 1 file changed, 2 insertions(+), 4 deletions(-) diff --git a/drivers/pci/xen-pcifront.c b/drivers/pci/xen-pcifront.c index d6ff5e82377d..8fc2e9532575 100644 --- a/drivers/pci/xen-pcifront.c +++ b/drivers/pci/xen-pcifront.c @@ -1038,10 +1038,8 @@ static int pcifront_detach_devices(struct pcifront_device *pdev) err = -ENOMEM; goto out; } - err = xenbus_scanf(XBT_NIL, pdev->xdev->otherend, str, "%d", - &state); - if (err != 1) - state = XenbusStateUnknown; + state = xenbus_read_unsigned(pdev->xdev->otherend, str, + XenbusStateUnknown); if (state != XenbusStateClosing) continue;