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Message-ID: <Pine.LNX.4.64.0810042203520.19286@ask.diku.dk> Date: Sat, 4 Oct 2008 22:05:08 +0200 (CEST) From: Julia Lawall <julia@...u.dk> To: ben-linux@...ff.org, linux-kernel@...r.kernel.org, kernel-janitors@...r.kernel.org Subject: [PATCH 1/2] drivers/i2c/busses/i2c-s3c2410.c: Correct use of ! and & From: Julia Lawall <julia@...u.dk> In commit e6bafba5b4765a5a252f1b8d31cbf6d2459da337, a bug was fixed that involved converting !x & y to !(x & y). The code below shows the same pattern, and thus should perhaps be fixed in the same way. In particular, the result of !readl(i2c->regs + S3C2410_IICCON) & S3C2410_IICCON_IRQEN is always 0. The semantic patch that makes this change is as follows: (http://www.emn.fr/x-info/coccinelle/) // <smpl> @@ expression E; constant C; @@ ( !E & !C | - !E & C + !(E & C) ) // </smpl> Signed-off-by: Julia Lawall <julia@...u.dk> --- drivers/i2c/busses/i2c-s3c2410.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff -u -p a/drivers/i2c/busses/i2c-s3c2410.c b/drivers/i2c/busses/i2c-s3c2410.c --- a/drivers/i2c/busses/i2c-s3c2410.c +++ b/drivers/i2c/busses/i2c-s3c2410.c @@ -507,7 +507,7 @@ static int s3c24xx_i2c_doxfer(struct s3c unsigned long timeout; int ret; - if (!readl(i2c->regs + S3C2410_IICCON) & S3C2410_IICCON_IRQEN) + if (!(readl(i2c->regs + S3C2410_IICCON) & S3C2410_IICCON_IRQEN)) return -EIO; ret = s3c24xx_i2c_set_master(i2c); -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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