nvme: Fix uninitialized-variable warning

gcc may detect a false positive on nvme using an unintialized variable
if setting features fails. Since this is not a fast path, explicitly
initialize this variable to suppress the warning.

Reported-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Keith Busch <kbusch@kernel.org>

diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c
index ada59df..a4d8c90 100644 (file)
--- a/drivers/nvme/host/core.c
+++ b/drivers/nvme/host/core.c
@@ -1165,8 +1165,8 @@ static int nvme_identify_ns(struct nvme_ctrl *ctrl,
 static int nvme_features(struct nvme_ctrl *dev, u8 op, unsigned int fid,
                unsigned int dword11, void *buffer, size_t buflen, u32 *result)
 {
 static int nvme_features(struct nvme_ctrl *dev, u8 op, unsigned int fid,
                unsigned int dword11, void *buffer, size_t buflen, u32 *result)
 {

+       union nvme_result res = { 0 };

        struct nvme_command c;
        struct nvme_command c;

-       union nvme_result res;

        int ret;
 
        memset(&c, 0, sizeof(c));
        int ret;
 
        memset(&c, 0, sizeof(c));