blktap2: initialise buf in qcow2raw.c:main

Gcc complains:

qcow2raw.c: In function ‘main’:
qcow2raw.c:387:17: error: ‘buf’ may be used uninitialized in this function [-Werror=maybe-uninitialized]
    treq.buf     = buf;
                 ^

But buf is a valid buffer allocated by posix_memalign at that point.

Signed-off-by: Wei Liu <wei.liu2@citrix.com>
Reviewed-by: Doug Goldstein <cardoe@cardoe.com>
Release-acked-by: Wei Liu <wei.liu2@citrix.com>

diff --git a/tools/blktap2/drivers/qcow2raw.c b/tools/blktap2/drivers/qcow2raw.c
index a2e417dae15c6500374021c9380913c039c16108..5ad730595e43052ee206c564ddbe039fdd3daaf1 100644 (file)
--- a/tools/blktap2/drivers/qcow2raw.c
+++ b/tools/blktap2/drivers/qcow2raw.c
@@ -202,7 +202,7 @@ int main(int argc, const char *argv[])
        uint64_t size;
        struct timeval timeout;
        uint64_t i;
-       char *buf;
+       char *buf = NULL;
        struct stat finfo;
        td_request_t treq;
        td_vbd_request_t* vreq;