From: Radu Pirea (OSS) radu-nicolae.pirea@oss.nxp.com
commit bdaaecc127d471c422ee9e994978617c8aa79e1e upstream.
Any multiplication between GENMASK(31, 0) and a number bigger than 1 will be truncated because of the overflow, if the size of unsigned long is 32 bits.
Replaced GENMASK with GENMASK_ULL to make sure that multiplication will be between 64 bits values.
Cc: stable@vger.kernel.org # 5.15+ Fixes: 514def5dd339 ("phy: nxp-c45-tja11xx: add timestamping support") Signed-off-by: Radu Pirea (OSS) radu-nicolae.pirea@oss.nxp.com Reviewed-by: Andrew Lunn andrew@lunn.ch Link: https://lore.kernel.org/r/20230406095953.75622-1-radu-nicolae.pirea@oss.nxp.... Signed-off-by: Jakub Kicinski kuba@kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/net/phy/nxp-c45-tja11xx.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/net/phy/nxp-c45-tja11xx.c +++ b/drivers/net/phy/nxp-c45-tja11xx.c @@ -168,7 +168,7 @@ #define MAX_ID_PS 2260U #define DEFAULT_ID_PS 2000U
-#define PPM_TO_SUBNS_INC(ppb) div_u64(GENMASK(31, 0) * (ppb) * \ +#define PPM_TO_SUBNS_INC(ppb) div_u64(GENMASK_ULL(31, 0) * (ppb) * \ PTP_CLK_PERIOD_100BT1, NSEC_PER_SEC)
#define NXP_C45_SKB_CB(skb) ((struct nxp_c45_skb_cb *)(skb)->cb)