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uio: fix compilation with -Og

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The compilation with gcc-6.3.0 and EXTRA_CFLAGS=-Og gives the following
error:

  CC eal_pci_uio.o
  eal_pci_uio.c: In function ‘pci_get_uio_de ’:
  eal_pci_uio.c:221:9: error: ‘uio_num’ may be used uninitialized in
                       this function [-Werror=maybe-uninitialized]
  return uio_num;
         ^~~~~~~

This is a false positive: gcc is not able to see that when e != NULL,
uio_num is always set. Fix the warning by initializing uio_num to -1,
and by the way, change the type to int.

Signed-off-by: Olivier Matz <olivier.matz@6wind.com>
This commit is contained in:
Olivier Matz 2017-09-11 17:13:28 +02:00 committed by Ferruh Yigit
parent f4b7699c88
commit 84585f330f
1 changed files with 1 additions and 1 deletions
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2
lib/librte_eal/linuxapp/eal/eal_pci_uio.c
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@ -154,7 +154,7 @@ pci_get_uio_dev(struct rte_pci_device *dev, char *dstbuf,
unsigned int buflen, int create)
{
struct rte_pci_addr *loc = &dev->addr;
unsigned int uio_num;
int uio_num = -1;
struct dirent *e;
DIR *dir;
char dirname[PATH_MAX];