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fsl/fman: use 32-bit unsigned integer

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[ Upstream commit 99f47abd9f ]

Potentially overflowing expression (ts_freq << 16 and intgr << 16)
declared as type u32 (32-bit unsigned) is evaluated using 32-bit
arithmetic and then used in a context that expects an expression of
type u64 (64-bit unsigned) which ultimately is used as 16-bit
unsigned by typecasting to u16. Fixed by using an unsigned 32-bit
integer since the value is truncated anyway in the end.

Fixes: 414fd46e77 ("fsl/fman: Add FMan support")
Signed-off-by: Florinel Iordache <florinel.iordache@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Florinel Iordache
2020-08-03 10:07:30 +03:00
committed by Greg Kroah-Hartman
parent 61e19d3aa5
commit eb8119b993
1 changed files with 1 additions and 2 deletions
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3
drivers/net/ethernet/freescale/fman/fman.c
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@@ -1446,8 +1446,7 @@ static void enable_time_stamp(struct fman *fman)
{
struct fman_fpm_regs __iomem *fpm_rg = fman->fpm_regs;
u16 fm_clk_freq = fman->state->fm_clk_freq;
u32 tmp, intgr, ts_freq;
u64 frac;
u32 tmp, intgr, ts_freq, frac;
ts_freq = (u32)(1 << fman->state->count1_micro_bit);
/* configure timestamp so that bit 8 will count 1 microsecond