From: Julia Lawall <[email protected]> The result of one call to a function is tested, and then at the second call to the same function, the previous result, and not the current result, is tested again.
The semantic match that finds this problem is as follows: (http://coccinelle.lip6.fr/) // <smpl> @@ expression ret; identifier f; statement S1,S2; @@ *ret = f(...); if (\(ret != 0\|ret < 0\|ret == NULL\)) S1 ... when any *f(...); if (\(ret != 0\|ret < 0\|ret == NULL\)) S2 // </smpl> Signed-off-by: Julia Lawall <[email protected]> --- drivers/media/video/gspca/cpia1.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/media/video/gspca/cpia1.c b/drivers/media/video/gspca/cpia1.c index 2499a88..b3ba47d 100644 --- a/drivers/media/video/gspca/cpia1.c +++ b/drivers/media/video/gspca/cpia1.c @@ -751,7 +751,7 @@ static int goto_high_power(struct gspca_dev *gspca_dev) if (signal_pending(current)) return -EINTR; - do_command(gspca_dev, CPIA_COMMAND_GetCameraStatus, 0, 0, 0, 0); + ret = do_command(gspca_dev, CPIA_COMMAND_GetCameraStatus, 0, 0, 0, 0); if (ret) return ret; -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
