From: Richard Weinberger <richard@nod.at>
Date: Wed, 4 Mar 2015 11:44:03 +0000 (+0100)
Subject: hostfs: Set page flags in hostfs_readpage() correctly
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=b86b413a321105cb75373b48fd7ba53fcbc7ec4c;p=linux-beck.git

hostfs: Set page flags in hostfs_readpage() correctly

In case of an error set the page error flag and clear the up-to-date
flag.
If the read was successful clear the error flag unconditionally.

Signed-off-by: Richard Weinberger <richard@nod.at>
---

diff --git a/fs/hostfs/hostfs_kern.c b/fs/hostfs/hostfs_kern.c
index cf80a30058b0..f1547479e62e 100644
--- a/fs/hostfs/hostfs_kern.c
+++ b/fs/hostfs/hostfs_kern.c
@@ -445,24 +445,26 @@ static int hostfs_readpage(struct file *file, struct page *page)
 {
 	char *buffer;
 	long long start;
-	int bytes_read, ret;
+	int bytes_read, ret = 0;
 
 	start = (long long) page->index << PAGE_CACHE_SHIFT;
 	buffer = kmap(page);
 	bytes_read = read_file(FILE_HOSTFS_I(file)->fd, &start, buffer,
 			PAGE_CACHE_SIZE);
 	if (bytes_read < 0) {
+		ClearPageUptodate(page);
+		SetPageError(page);
 		ret = bytes_read;
 		goto out;
 	}
 
 	memset(buffer + bytes_read, 0, PAGE_CACHE_SIZE - bytes_read);
 
-	flush_dcache_page(page);
+	ClearPageError(page);
 	SetPageUptodate(page);
-	if (PageError(page)) ClearPageError(page);
-	ret = 0;
+
  out:
+	flush_dcache_page(page);
 	kunmap(page);
 	unlock_page(page);
 	return ret;