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| author | Tomasz Figa <t.figa@samsung.com> | 2014-03-17 23:28:09 +0100 |
|---|---|---|
| committer | Kukjin Kim <kgene.kim@samsung.com> | 2014-03-20 20:04:42 +0100 |
| commit | 61557b8bac9c80a5c14d237d420c246703e5c2e2 (patch) | |
| tree | 8d6ea839f96309abd1f453896f8ec7a46af7fdaf /arch | |
| parent | Merge branch 'v3.15-next/cleanup-samsung-2' into v3.15-next/s2r-pm-samsung-2 (diff) | |
| download | linux-61557b8bac9c80a5c14d237d420c246703e5c2e2.tar.xz linux-61557b8bac9c80a5c14d237d420c246703e5c2e2.zip | |
ARM: EXYNOS: Do not resume l2x0 if not enabled before suspend
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@samsung.com>
Acked-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/arm/plat-samsung/s5p-sleep.S | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/arch/arm/plat-samsung/s5p-sleep.S b/arch/arm/plat-samsung/s5p-sleep.S index a030e7301da8..20764bd5518e 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) |