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| author | Yang Li <yang.lee@linux.alibaba.com> | 2021-11-18 17:48:03 +0800 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2021-11-19 20:13:02 -0800 |
| commit | d9f31aeaa1e5aefa68130878af3c3513d41c1e2d (patch) | |
| tree | 93418f43334231934f91944f9da0add927db15c8 /drivers/net/ethernet/renesas/ravb_main.c | |
| parent | 8d22679dc89a6d9e1d41b2514902e3f7ef51547a (diff) | |
| download | linux-d9f31aeaa1e5aefa68130878af3c3513d41c1e2d.tar.bz2 | |
ethernet: renesas: Use div64_ul instead of do_div
do_div() does a 64-by-32 division. Here the divisor is an
unsigned long which on some platforms is 64 bit wide. So use
div64_ul instead of do_div to avoid a possible truncation.
Eliminate the following coccicheck warning:
./drivers/net/ethernet/renesas/ravb_main.c:2492:1-7: WARNING:
do_div() does a 64-by-32 division, please consider using div64_ul
instead.
Reported-by: Abaci Robot <abaci@linux.alibaba.com>
Signed-off-by: Yang Li <yang.lee@linux.alibaba.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Sergey Shtylyov <s.shtylyov@omp.ru>
Link: https://lore.kernel.org/r/1637228883-100100-1-git-send-email-yang.lee@linux.alibaba.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'drivers/net/ethernet/renesas/ravb_main.c')
| -rw-r--r-- | drivers/net/ethernet/renesas/ravb_main.c | 6 |
1 files changed, 2 insertions, 4 deletions
diff --git a/drivers/net/ethernet/renesas/ravb_main.c b/drivers/net/ethernet/renesas/ravb_main.c index b4c597f4040c..151cce2fe36d 100644 --- a/drivers/net/ethernet/renesas/ravb_main.c +++ b/drivers/net/ethernet/renesas/ravb_main.c @@ -30,8 +30,7 @@ #include <linux/spinlock.h> #include <linux/sys_soc.h> #include <linux/reset.h> - -#include <asm/div64.h> +#include <linux/math64.h> #include "ravb.h" @@ -2488,8 +2487,7 @@ static int ravb_set_gti(struct net_device *ndev) if (!rate) return -EINVAL; - inc = 1000000000ULL << 20; - do_div(inc, rate); + inc = div64_ul(1000000000ULL << 20, rate); if (inc < GTI_TIV_MIN || inc > GTI_TIV_MAX) { dev_err(dev, "gti.tiv increment 0x%llx is outside the range 0x%x - 0x%x\n", |