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| author | Grygorii Strashko <grygorii.strashko@ti.com> | 2016-08-04 17:20:51 +0200 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2016-08-09 01:12:17 +0200 |
| commit | aeec3021043b66a1418df416e1ba83def070cef1 (patch) | |
| tree | 26b9f3542d1b13f5689778122e9756f70130516c /drivers | |
| parent | net/sched/sch_hfsc.c: remove unused cl_myfadj (diff) | |
| download | linux-aeec3021043b66a1418df416e1ba83def070cef1.tar.xz linux-aeec3021043b66a1418df416e1ba83def070cef1.zip | |
net: ethernet: ti: cpdma: remove used_desc counter
The struct cpdma_desc_pool->used_desc field can be safely removed from
CPDMA driver (and hot patch) because used_descs counter is used just
for pool consistency check at CPDMA deinitialization and now this
check can be re-implemnted using gen_pool_size(pool->gen_pool) !=
gen_pool_avail(pool->gen_pool).
More over, this will allow to get rid of warnings in
cpdma_desc_pool_destro()-> WARN_ON(pool->used_desc) which may happen
because the used_descs is used unprotected, since CPDMA has been
switched to use genalloc, and may get wrong values on SMP.
Hence, remove used_desc from struct cpdma_desc_pool.
Signed-off-by: Grygorii Strashko <grygorii.strashko@ti.com>
Reviewed-by: Ivan Khoronzhuk <ivan.khoronzhuk@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/net/ethernet/ti/davinci_cpdma.c | 18 |
1 files changed, 7 insertions, 11 deletions
diff --git a/drivers/net/ethernet/ti/davinci_cpdma.c b/drivers/net/ethernet/ti/davinci_cpdma.c index 19e5f32a8a64..cf72b3390d85 100644 --- a/drivers/net/ethernet/ti/davinci_cpdma.c +++ b/drivers/net/ethernet/ti/davinci_cpdma.c @@ -86,7 +86,7 @@ struct cpdma_desc_pool { void __iomem *iomap; /* ioremap map */ void *cpumap; /* dma_alloc map */ int desc_size, mem_size; - int num_desc, used_desc; + int num_desc; struct device *dev; struct gen_pool *gen_pool; }; @@ -148,7 +148,10 @@ static void cpdma_desc_pool_destroy(struct cpdma_desc_pool *pool) if (!pool) return; - WARN_ON(pool->used_desc); + WARN(gen_pool_size(pool->gen_pool) != gen_pool_avail(pool->gen_pool), + "cpdma_desc_pool size %d != avail %d", + gen_pool_size(pool->gen_pool), + gen_pool_avail(pool->gen_pool)); if (pool->cpumap) dma_free_coherent(pool->dev, pool->mem_size, pool->cpumap, pool->phys); @@ -232,21 +235,14 @@ desc_from_phys(struct cpdma_desc_pool *pool, dma_addr_t dma) static struct cpdma_desc __iomem * cpdma_desc_alloc(struct cpdma_desc_pool *pool) { - struct cpdma_desc __iomem *desc = NULL; - - desc = (struct cpdma_desc __iomem *)gen_pool_alloc(pool->gen_pool, - pool->desc_size); - if (desc) - pool->used_desc++; - - return desc; + return (struct cpdma_desc __iomem *) + gen_pool_alloc(pool->gen_pool, pool->desc_size); } static void cpdma_desc_free(struct cpdma_desc_pool *pool, struct cpdma_desc __iomem *desc, int num_desc) { gen_pool_free(pool->gen_pool, (unsigned long)desc, pool->desc_size); - pool->used_desc--; } struct cpdma_ctlr *cpdma_ctlr_create(struct cpdma_params *params) |