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| author | Anton Vorontsov <avorontsov@ru.mvista.com> | 2009-09-16 01:43:52 +0400 |
|---|---|---|
| committer | Kumar Gala <galak@kernel.crashing.org> | 2009-11-11 21:43:13 -0600 |
| commit | 0c7b87b0857f0e17be982fd840046444a83c3996 (patch) | |
| tree | 4a03a62678cd4725d5216dbf1fb550bed366908b | |
| parent | dc2e673dbcbaebdf84c09956b85c3be3a8b7bd02 (diff) | |
| download | linux-0c7b87b0857f0e17be982fd840046444a83c3996.tar.gz linux-0c7b87b0857f0e17be982fd840046444a83c3996.tar.bz2 linux-0c7b87b0857f0e17be982fd840046444a83c3996.zip | |
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>
| -rw-r--r-- | arch/powerpc/include/asm/qe.h | 2 | ||||
| -rw-r--r-- | arch/powerpc/sysdev/cpm_common.c | 5 | ||||
| -rw-r--r-- | arch/powerpc/sysdev/qe_lib/qe.c | 12 |
3 files changed, 12 insertions, 7 deletions
diff --git a/arch/powerpc/include/asm/qe.h b/arch/powerpc/include/asm/qe.h index 28fee3b7887a..908f0b75745b 100644 --- a/arch/powerpc/include/asm/qe.h +++ b/arch/powerpc/include/asm/qe.h @@ -87,7 +87,7 @@ extern spinlock_t cmxgcr_lock; /* Export QE common operations */ #ifdef CONFIG_QUICC_ENGINE -extern void __init qe_reset(void); +extern void qe_reset(void); #else static inline void qe_reset(void) {} #endif diff --git a/arch/powerpc/sysdev/cpm_common.c b/arch/powerpc/sysdev/cpm_common.c index e4b6d66d93de..9de72c96e6d1 100644 --- a/arch/powerpc/sysdev/cpm_common.c +++ b/arch/powerpc/sysdev/cpm_common.c @@ -72,7 +72,7 @@ static phys_addr_t muram_pbase; /* Max address size we deal with */ #define OF_MAX_ADDR_CELLS 4 -int __init cpm_muram_init(void) +int cpm_muram_init(void) { struct device_node *np; struct resource r; @@ -81,6 +81,9 @@ int __init cpm_muram_init(void) int i = 0; int ret = 0; + if (muram_pbase) + return 0; + spin_lock_init(&cpm_muram_lock); /* initialize the info header */ rh_init(&cpm_muram_info, 1, diff --git a/arch/powerpc/sysdev/qe_lib/qe.c b/arch/powerpc/sysdev/qe_lib/qe.c index fff2701b90df..1ed1a9fd9bcf 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 | |