From: Qian Cai Date: Fri, 30 Nov 2018 02:18:07 +0000 (-0500) Subject: mlx4: Use snprintf instead of complicated strcpy X-Git-Tag: v5.0-rc1~111^2~106 X-Git-Url: https://asedeno.scripts.mit.edu/gitweb/?a=commitdiff_plain;h=0fbc9b8b4ea3f688a5da141a64f97aa33ad02ae9;p=linux.git mlx4: Use snprintf instead of complicated strcpy This fixes a compilation warning in sysfs.c drivers/infiniband/hw/mlx4/sysfs.c:360:2: warning: 'strncpy' output may be truncated copying 8 bytes from a string of length 31 [-Wstringop-truncation] By eliminating the temporary stack buffer. Signed-off-by: Qian Cai Reviewed-by: Leon Romanovsky Signed-off-by: Jason Gunthorpe --- diff --git a/drivers/infiniband/hw/mlx4/sysfs.c b/drivers/infiniband/hw/mlx4/sysfs.c index 752bdd536130..ea1f3a081b05 100644 --- a/drivers/infiniband/hw/mlx4/sysfs.c +++ b/drivers/infiniband/hw/mlx4/sysfs.c @@ -353,16 +353,12 @@ static int add_port_entries(struct mlx4_ib_dev *device, int port_num) static void get_name(struct mlx4_ib_dev *dev, char *name, int i, int max) { - char base_name[9]; - - /* pci_name format is: bus:dev:func -> xxxx:yy:zz.n */ - strlcpy(name, pci_name(dev->dev->persist->pdev), max); - strncpy(base_name, name, 8); /*till xxxx:yy:*/ - base_name[8] = '\0'; - /* with no ARI only 3 last bits are used so when the fn is higher than 8 + /* pci_name format is: bus:dev:func -> xxxx:yy:zz.n + * with no ARI only 3 last bits are used so when the fn is higher than 8 * need to add it to the dev num, so count in the last number will be * modulo 8 */ - sprintf(name, "%s%.2d.%d", base_name, (i/8), (i%8)); + snprintf(name, max, "%.8s%.2d.%d", pci_name(dev->dev->persist->pdev), + i / 8, i % 8); } struct mlx4_port {