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powerpc/[booke|4xx]: Don't clobber TCR[WP] when setting TCR[DIE]
authorIvan Mikhaylov <ivan@de.ibm.com>
Fri, 19 May 2017 15:47:05 +0000 (18:47 +0300)
committerMichael Ellerman <mpe@ellerman.id.au>
Tue, 30 May 2017 04:59:51 +0000 (14:59 +1000)
commit6e2f03e292ef46eed2b31b0a344a91d514f9cd81
treefc20bfd1e8f49c361bbe28a572bcff12a9fdba0ctree | snapshot (tar.gz zip)
parent20975a0ae1ccc59a21a149e2fd2964ce88edb0a9commit | diff
powerpc/[booke|4xx]: Don't clobber TCR[WP] when setting TCR[DIE]

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>
arch/powerpc/kernel/time.c diff | blob | blame | history