From: David S. Miller <davem@davemloft.net>
Date: Mon, 20 Feb 2006 09:42:51 +0000 (-0800)
Subject: [SPARC64]: Handle zero-length map requests in pci_sun4v.c
X-Git-Tag: firefly_0821_release~37607^2~59
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=d82965c16781a7c5b8508c3784ba10bbeef34ff4;p=firefly-linux-kernel-4.4.55.git

[SPARC64]: Handle zero-length map requests in pci_sun4v.c

By simply changing the do-while loop into a plain
while loop.

Signed-off-by: David S. Miller <davem@davemloft.net>
---

diff --git a/arch/sparc64/kernel/pci_sun4v.c b/arch/sparc64/kernel/pci_sun4v.c
index d9ef0c7580ea..a9c44c0ae0a7 100644
--- a/arch/sparc64/kernel/pci_sun4v.c
+++ b/arch/sparc64/kernel/pci_sun4v.c
@@ -57,7 +57,7 @@ static long pci_iommu_batch_flush(struct pci_iommu_batch *p)
 	u64 *pglist = p->pglist;
 	unsigned long npages = p->npages;
 
-	do {
+	while (npages != 0) {
 		long num;
 
 		num = pci_sun4v_iommu_map(devhandle, HV_PCI_TSBID(0, entry),
@@ -75,7 +75,7 @@ static long pci_iommu_batch_flush(struct pci_iommu_batch *p)
 		entry += num;
 		npages -= num;
 		pglist += num;
-	} while (npages != 0);
+	}
 
 	p->entry = entry;
 	p->npages = 0;