m68k: hp300: Handle timer counter overflow

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Because hp300_read_clk() never checks the timer interrupt flag it may
fail to notice that the timer has wrapped, allowing the clock to jump
backwards. This is not a new problem.

This is resolved by checking the interrupt flag and, if need be,
taking wrap-around into account. The interrupt handler clears the flag
when it eventually executes.

Signed-off-by: Finn Thain <fthain@telegraphics.com.au>
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>

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Finn Thain 2018-12-01 11:53:10 +11:00 • committed by Geert Uytterhoeven

parent 2ed16626f5

commit 4be2ba93cf

1 changed files with 27 additions and 19 deletions

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arch/m68k/hp300/time.c

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