powerpc/[booke|4xx]: Don't clobber TCR[WP] when setting TCR[DIE]

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Prevent a kernel panic caused by unintentionally clearing TCR watchdog
bits. At this point in the kernel boot, the watchdog may have already
been enabled by u-boot. The original code's attempt to write to the TCR
register results in an inadvertent clearing of the watchdog
configuration bits, causing the 476 to reset.

Signed-off-by: Ivan Mikhaylov <ivan@de.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

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Ivan Mikhaylov 2017-05-19 18:47:05 +03:00 • committed by Michael Ellerman

parent 20975a0ae1

commit 6e2f03e292

1 changed files with 11 additions and 3 deletions

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arch/powerpc/kernel/time.c

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