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author | Alexander Popov <a13xp0p0v88@gmail.com> | 2014-04-23 17:53:26 +0400 |
---|---|---|
committer | Vinod Koul <vinod.koul@intel.com> | 2014-05-02 22:36:22 +0530 |
commit | baca66f7960f60a7ed5884acf4eb1a76d868c43c (patch) | |
tree | 45f3997cc14ac18aa465ddf5bf179b44b1089f4c /drivers/dma/mpc512x_dma.c | |
parent | 62057d3375a5237c24f1dee82cb6c860081cc4ff (diff) | |
download | op-kernel-dev-baca66f7960f60a7ed5884acf4eb1a76d868c43c.zip op-kernel-dev-baca66f7960f60a7ed5884acf4eb1a76d868c43c.tar.gz |
dma: mpc512x: fix freeing resources in mpc_dma_probe() and mpc_dma_remove()
Fix mpc_dma_probe() error path and mpc_dma_remove(): manually free IRQs and
dispose IRQ mappings before devm_* takes care of other resources.
Moreover replace devm_request_irq() with request_irq() since there is no need
to use it because the original code always frees IRQ manually with
devm_free_irq(). Replace devm_free_irq() with free_irq() accordingly.
Signed-off-by: Alexander Popov <a13xp0p0v88@gmail.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Diffstat (limited to 'drivers/dma/mpc512x_dma.c')
-rw-r--r-- | drivers/dma/mpc512x_dma.c | 55 |
1 files changed, 38 insertions, 17 deletions
diff --git a/drivers/dma/mpc512x_dma.c b/drivers/dma/mpc512x_dma.c index 0b17f4d..96104f4 100644 --- a/drivers/dma/mpc512x_dma.c +++ b/drivers/dma/mpc512x_dma.c @@ -657,13 +657,15 @@ static int mpc_dma_probe(struct platform_device *op) mdma = devm_kzalloc(dev, sizeof(struct mpc_dma), GFP_KERNEL); if (!mdma) { dev_err(dev, "Memory exhausted!\n"); - return -ENOMEM; + retval = -ENOMEM; + goto err; } mdma->irq = irq_of_parse_and_map(dn, 0); if (mdma->irq == NO_IRQ) { dev_err(dev, "Error mapping IRQ!\n"); - return -EINVAL; + retval = -EINVAL; + goto err; } if (of_device_is_compatible(dn, "fsl,mpc8308-dma")) { @@ -671,14 +673,15 @@ static int mpc_dma_probe(struct platform_device *op) mdma->irq2 = irq_of_parse_and_map(dn, 1); if (mdma->irq2 == NO_IRQ) { dev_err(dev, "Error mapping IRQ!\n"); - return -EINVAL; + retval = -EINVAL; + goto err_dispose1; } } retval = of_address_to_resource(dn, 0, &res); if (retval) { dev_err(dev, "Error parsing memory region!\n"); - return retval; + goto err_dispose2; } regs_start = res.start; @@ -686,31 +689,34 @@ static int mpc_dma_probe(struct platform_device *op) if (!devm_request_mem_region(dev, regs_start, regs_size, DRV_NAME)) { dev_err(dev, "Error requesting memory region!\n"); - return -EBUSY; + retval = -EBUSY; + goto err_dispose2; } mdma->regs = devm_ioremap(dev, regs_start, regs_size); if (!mdma->regs) { dev_err(dev, "Error mapping memory region!\n"); - return -ENOMEM; + retval = -ENOMEM; + goto err_dispose2; } mdma->tcd = (struct mpc_dma_tcd *)((u8 *)(mdma->regs) + MPC_DMA_TCD_OFFSET); - retval = devm_request_irq(dev, mdma->irq, &mpc_dma_irq, 0, DRV_NAME, - mdma); + retval = request_irq(mdma->irq, &mpc_dma_irq, 0, DRV_NAME, mdma); if (retval) { dev_err(dev, "Error requesting IRQ!\n"); - return -EINVAL; + retval = -EINVAL; + goto err_dispose2; } if (mdma->is_mpc8308) { - retval = devm_request_irq(dev, mdma->irq2, &mpc_dma_irq, 0, - DRV_NAME, mdma); + retval = request_irq(mdma->irq2, &mpc_dma_irq, 0, + DRV_NAME, mdma); if (retval) { dev_err(dev, "Error requesting IRQ2!\n"); - return -EINVAL; + retval = -EINVAL; + goto err_free1; } } @@ -793,12 +799,23 @@ static int mpc_dma_probe(struct platform_device *op) /* Register DMA engine */ dev_set_drvdata(dev, mdma); retval = dma_async_device_register(dma); - if (retval) { - devm_free_irq(dev, mdma->irq, mdma); - irq_dispose_mapping(mdma->irq); - } + if (retval) + goto err_free2; return retval; + +err_free2: + if (mdma->is_mpc8308) + free_irq(mdma->irq2, mdma); +err_free1: + free_irq(mdma->irq, mdma); +err_dispose2: + if (mdma->is_mpc8308) + irq_dispose_mapping(mdma->irq2); +err_dispose1: + irq_dispose_mapping(mdma->irq); +err: + return retval; } static int mpc_dma_remove(struct platform_device *op) @@ -807,7 +824,11 @@ static int mpc_dma_remove(struct platform_device *op) struct mpc_dma *mdma = dev_get_drvdata(dev); dma_async_device_unregister(&mdma->dma); - devm_free_irq(dev, mdma->irq, mdma); + if (mdma->is_mpc8308) { + free_irq(mdma->irq2, mdma); + irq_dispose_mapping(mdma->irq2); + } + free_irq(mdma->irq, mdma); irq_dispose_mapping(mdma->irq); return 0; |