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x86: tsc_timer: Correct overflow in __udelay()

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At present long delays such as msleep(2000) can cause an overflow in this
function. There is no need for this, since it already uses a 64-bit int.

Add a cast to correct this.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
This commit is contained in:
Simon Glass 2021-01-13 20:29:45 -07:00 committed by Bin Meng
parent 12218c1ff4
commit 9edf20f156
1 changed files with 1 additions and 1 deletions
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2
drivers/timer/tsc_timer.c
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@ -372,7 +372,7 @@ void __udelay(unsigned long usec)
u64 now = get_ticks(); u64 now = get_ticks();
u64 stop; u64 stop;
stop = now + usec * get_tbclk_mhz(); stop = now + (u64)usec * get_tbclk_mhz();
while ((int64_t)(stop - get_ticks()) > 0) while ((int64_t)(stop - get_ticks()) > 0)
#if defined(CONFIG_QEMU) && defined(CONFIG_SMP) #if defined(CONFIG_QEMU) && defined(CONFIG_SMP)