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authorAnton Vorontsov <avorontsov@ru.mvista.com>2009-09-16 01:43:52 +0400
committerKumar Gala <galak@kernel.crashing.org>2009-11-11 21:43:13 -0600
commit0c7b87b0857f0e17be982fd840046444a83c3996 (patch)
tree4a03a62678cd4725d5216dbf1fb550bed366908b /arch/powerpc/sysdev/qe_lib
parentdc2e673dbcbaebdf84c09956b85c3be3a8b7bd02 (diff)
powerpc/qe: Make qe_reset() code path safe for repeated invocation
For MPC8569 CPUs we'll need to reset QE after each suspend, so make qe_reset() code path suitable for repeated invocation, that is: - Don't initialize rheap structures if already initialized; - Don't allocate muram for SDMA if already allocated, just reinitialize registers with previously allocated muram offset; - Remove __init attributes from qe_reset() and cpm_muram_init(); Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
Diffstat (limited to 'arch/powerpc/sysdev/qe_lib')
-rw-r--r--arch/powerpc/sysdev/qe_lib/qe.c12
1 files changed, 7 insertions, 5 deletions
diff --git a/arch/powerpc/sysdev/qe_lib/qe.c b/arch/powerpc/sysdev/qe_lib/qe.c
index fff2701b90d..1ed1a9fd9bc 100644
--- a/arch/powerpc/sysdev/qe_lib/qe.c
+++ b/arch/powerpc/sysdev/qe_lib/qe.c
@@ -104,7 +104,7 @@ phys_addr_t get_qe_base(void)
EXPORT_SYMBOL(get_qe_base);
-void __init qe_reset(void)
+void qe_reset(void)
{
if (qe_immr == NULL)
qe_immr = ioremap(get_qe_base(), QE_IMMAP_SIZE);
@@ -330,16 +330,18 @@ EXPORT_SYMBOL(qe_put_snum);
static int qe_sdma_init(void)
{
struct sdma __iomem *sdma = &qe_immr->sdma;
- unsigned long sdma_buf_offset;
+ static unsigned long sdma_buf_offset = (unsigned long)-ENOMEM;
if (!sdma)
return -ENODEV;
/* allocate 2 internal temporary buffers (512 bytes size each) for
* the SDMA */
- sdma_buf_offset = qe_muram_alloc(512 * 2, 4096);
- if (IS_ERR_VALUE(sdma_buf_offset))
- return -ENOMEM;
+ if (IS_ERR_VALUE(sdma_buf_offset)) {
+ sdma_buf_offset = qe_muram_alloc(512 * 2, 4096);
+ if (IS_ERR_VALUE(sdma_buf_offset))
+ return -ENOMEM;
+ }
out_be32(&sdma->sdebcr, (u32) sdma_buf_offset & QE_SDEBCR_BA_MASK);
out_be32(&sdma->sdmr, (QE_SDMR_GLB_1_MSK |