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| author | Arnd Bergmann <arnd@arndb.de> | 2016-11-10 17:44:48 +0100 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2016-11-11 08:45:08 -0800 |
| commit | 92dfffee974f75c28b0c89f31318669091de1ec3 (patch) | |
| tree | af05e2169fc95c6560ccb3e13148d183e7c99dff /arch/s390 | |
| parent | 069013a9e2bbf1ace3f796cb664023dcd40730f7 (diff) | |
| download | linux-92dfffee974f75c28b0c89f31318669091de1ec3.tar.gz linux-92dfffee974f75c28b0c89f31318669091de1ec3.tar.bz2 linux-92dfffee974f75c28b0c89f31318669091de1ec3.zip | |
s390: pci: don't print uninitialized data for debugging
gcc correctly warns about an incorrect use of the 'pa' variable in case
we pass an empty scatterlist to __s390_dma_map_sg:
arch/s390/pci/pci_dma.c: In function '__s390_dma_map_sg':
arch/s390/pci/pci_dma.c:309:13: warning: 'pa' may be used uninitialized in this function [-Wmaybe-uninitialized]
This adds a bogus initialization to the function to sanitize the debug
output. I would have preferred a solution without the initialization,
but I only got the report from the kbuild bot after turning on the
warning again, and didn't manage to reproduce it myself.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Sebastian Ott <sebott@linux.vnet.ibm.com>
Acked-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'arch/s390')
| -rw-r--r-- | arch/s390/pci/pci_dma.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/s390/pci/pci_dma.c b/arch/s390/pci/pci_dma.c index 7350c8bc13a2..6b2f72f523b9 100644 --- a/arch/s390/pci/pci_dma.c +++ b/arch/s390/pci/pci_dma.c @@ -423,7 +423,7 @@ static int __s390_dma_map_sg(struct device *dev, struct scatterlist *sg, dma_addr_t dma_addr_base, dma_addr; int flags = ZPCI_PTE_VALID; struct scatterlist *s; - unsigned long pa; + unsigned long pa = 0; int ret; size = PAGE_ALIGN(size); |