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9pfs-proxy: tiny cleanups in proxy_pwritev and proxy_preadv 

Don't compare syscall return with -1, use "<0" condition.
Don't introduce useless local variables when we already
have similar variable
Rename local variable to be consistent with other usages
Finally make the two methods, read and write, to be similar to each other

Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
This commit is contained in:
Michael Tokarev 2015-03-12 09:36:12 +03:00 committed by Aneesh Kumar K.V
parent 1b6f85e2cb
commit 7752efcacf
1 changed files with 8 additions and 10 deletions
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18
hw/9pfs/virtio-9p-proxy.c
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@ -693,16 +693,16 @@ static ssize_t proxy_preadv(FsContext *ctx, V9fsFidOpenState *fs,
const struct iovec *iov,
int iovcnt, off_t offset)
{
ssize_t ret;
#ifdef CONFIG_PREADV
return preadv(fs->fd, iov, iovcnt, offset);
ret = preadv(fs->fd, iov, iovcnt, offset);
#else
int err = lseek(fs->fd, offset, SEEK_SET);
if (err == -1) {
return err;
} else {
return readv(fs->fd, iov, iovcnt);
ret = lseek(fs->fd, offset, SEEK_SET);
if (ret >= 0) {
ret = readv(fs->fd, iov, iovcnt);
}
#endif
return ret;
}
static ssize_t proxy_pwritev(FsContext *ctx, V9fsFidOpenState *fs,
@ -714,10 +714,8 @@ static ssize_t proxy_pwritev(FsContext *ctx, V9fsFidOpenState *fs,
#ifdef CONFIG_PREADV
ret = pwritev(fs->fd, iov, iovcnt, offset);
#else
int err = lseek(fs->fd, offset, SEEK_SET);
if (err == -1) {
return err;
} else {
ret = lseek(fs->fd, offset, SEEK_SET);
if (ret >= 0) {
ret = writev(fs->fd, iov, iovcnt);
}
#endif