[PATCH v1 1/2] tools: PCI: Fix compilation error

[Andy Shevchenko <andriy.shevchenko@linux.intel.com>]

The commit

  b71f0a0b1e3f ("tools: PCI: Exit with error code when test fails")

forgot to update function prototype and thus brought a regression:

pcitest.c:221:9: error: void value not ignored as it ought to be
 return run_test(test);
        ^~~~~~~~~~~~~~

Fix it by changing prototype from void to int.

While here, initialize ret with 0 to avoid compiler warning:

pcitest.c:132:25: warning: ‘ret’ may be used uninitialized in this function [-Wmaybe-uninitialized]

Fixes: b71f0a0b1e3f ("tools: PCI: Exit with error code when test fails")
Cc: Jean-Jacques Hiblot <jjhiblot@ti.com>
Cc: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Cc: Kishon Vijay Abraham I <kishon@ti.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
---
 tools/pci/pcitest.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/tools/pci/pcitest.c b/tools/pci/pcitest.c
index cb7a47dfd8b6..81b89260e80f 100644
--- a/tools/pci/pcitest.c
+++ b/tools/pci/pcitest.c
@@ -36,15 +36,15 @@ struct pci_test {
 	unsigned long	size;
 };
 
-static void run_test(struct pci_test *test)
+static int run_test(struct pci_test *test)
 {
-	long ret;
+	long ret = 0;
 	int fd;
 
 	fd = open(test->device, O_RDWR);
 	if (fd < 0) {
 		perror("can't open PCI Endpoint Test device");
-		return;
+		return fd;
 	}
 
 	if (test->barnum >= 0 && test->barnum <= 5) {
@@ -129,7 +129,7 @@ static void run_test(struct pci_test *test)
 	}
 
 	fflush(stdout);
-	return (ret < 0) ? ret : 1 - ret; /* return 0 if test succeeded */
+	return (ret < 0) ? ret : 0; /* return 0 if test succeeded */
 }
 
 int main(int argc, char **argv)
-- 
2.20.1