Trying to resume l2x0 if it was not enabled before suspend leads to system crash. This patch prevents this by checking if l2x0_regs_phys is a valid pointer to l2x0 context data saved on initialization. Signed-off-by: Tomasz Figa <t.figa@xxxxxxxxxxx> Acked-by: Kyungmin Park <kyungmin.park@xxxxxxxxxxx> --- arch/arm/plat-samsung/s5p-sleep.S | 8 +++++--- 1 file changed, 5 insertions(+), 3 deletions(-) diff --git a/arch/arm/plat-samsung/s5p-sleep.S b/arch/arm/plat-samsung/s5p-sleep.S index a030e73..20764bd 100644 --- a/arch/arm/plat-samsung/s5p-sleep.S +++ b/arch/arm/plat-samsung/s5p-sleep.S @@ -59,13 +59,15 @@ ENTRY(s3c_cpu_resume) and r0, r0, r1 ldr r1, =CPU_CORTEX_A9 cmp r0, r1 - bne resume_l2on + bne skip_l2_resume adr r0, l2x0_regs_phys ldr r0, [r0] + cmp r0, #0 + beq skip_l2_resume ldr r1, [r0, #L2X0_R_PHY_BASE] ldr r2, [r1, #L2X0_CTRL] tst r2, #0x1 - bne resume_l2on + bne skip_l2_resume ldr r2, [r0, #L2X0_R_AUX_CTRL] str r2, [r1, #L2X0_AUX_CTRL] ldr r2, [r0, #L2X0_R_TAG_LATENCY] @@ -78,7 +80,7 @@ ENTRY(s3c_cpu_resume) str r2, [r1, #L2X0_POWER_CTRL] mov r2, #1 str r2, [r1, #L2X0_CTRL] -resume_l2on: +skip_l2_resume: #endif b cpu_resume ENDPROC(s3c_cpu_resume) -- 1.8.5.2 -- To unsubscribe from this list: send the line "unsubscribe linux-samsung-soc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
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