diff options
| author | Anup Patel <anup.patel@broadcom.com> | 2017-08-22 15:26:59 +0530 |
|---|---|---|
| committer | Vinod Koul <vinod.koul@intel.com> | 2017-08-28 16:44:24 +0530 |
| commit | eb67744b9af736073d6dffb7fb139f3f05d7e6a8 (patch) | |
| tree | da12ca14aa9536541246be94489b987aa6bb9050 /drivers/dma | |
| parent | f83385142c3a0864e4ac82d852dd0fdb54742ce3 (diff) | |
| download | op-kernel-dev-eb67744b9af736073d6dffb7fb139f3f05d7e6a8.zip op-kernel-dev-eb67744b9af736073d6dffb7fb139f3f05d7e6a8.tar.gz | |
dmaengine: bcm-sba-raid: Alloc resources before registering DMA device
We should allocate DMA channel resources before registering the
DMA device in sba_probe() because we can get DMA request soon
after registering the DMA device. If DMA channel resources are
not allocated before first DMA request then SBA-RAID driver will
crash.
Signed-off-by: Anup Patel <anup.patel@broadcom.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Diffstat (limited to 'drivers/dma')
| -rw-r--r-- | drivers/dma/bcm-sba-raid.c | 30 |
1 files changed, 15 insertions, 15 deletions
diff --git a/drivers/dma/bcm-sba-raid.c b/drivers/dma/bcm-sba-raid.c index 9a9c0ad..67c53c6 100644 --- a/drivers/dma/bcm-sba-raid.c +++ b/drivers/dma/bcm-sba-raid.c @@ -1478,13 +1478,13 @@ static int sba_prealloc_channel_resources(struct sba_device *sba) int i, j, ret = 0; struct sba_request *req = NULL; - sba->resp_base = dma_alloc_coherent(sba->dma_dev.dev, + sba->resp_base = dma_alloc_coherent(sba->mbox_dev, sba->max_resp_pool_size, &sba->resp_dma_base, GFP_KERNEL); if (!sba->resp_base) return -ENOMEM; - sba->cmds_base = dma_alloc_coherent(sba->dma_dev.dev, + sba->cmds_base = dma_alloc_coherent(sba->mbox_dev, sba->max_cmds_pool_size, &sba->cmds_dma_base, GFP_KERNEL); if (!sba->cmds_base) { @@ -1534,11 +1534,11 @@ static int sba_prealloc_channel_resources(struct sba_device *sba) return 0; fail_free_cmds_pool: - dma_free_coherent(sba->dma_dev.dev, + dma_free_coherent(sba->mbox_dev, sba->max_cmds_pool_size, sba->cmds_base, sba->cmds_dma_base); fail_free_resp_pool: - dma_free_coherent(sba->dma_dev.dev, + dma_free_coherent(sba->mbox_dev, sba->max_resp_pool_size, sba->resp_base, sba->resp_dma_base); return ret; @@ -1547,9 +1547,9 @@ fail_free_resp_pool: static void sba_freeup_channel_resources(struct sba_device *sba) { dmaengine_terminate_all(&sba->dma_chan); - dma_free_coherent(sba->dma_dev.dev, sba->max_cmds_pool_size, + dma_free_coherent(sba->mbox_dev, sba->max_cmds_pool_size, sba->cmds_base, sba->cmds_dma_base); - dma_free_coherent(sba->dma_dev.dev, sba->max_resp_pool_size, + dma_free_coherent(sba->mbox_dev, sba->max_resp_pool_size, sba->resp_base, sba->resp_dma_base); sba->resp_base = NULL; sba->resp_dma_base = 0; @@ -1737,15 +1737,15 @@ static int sba_probe(struct platform_device *pdev) } } - /* Register DMA device with linux async framework */ - ret = sba_async_register(sba); + /* Prealloc channel resource */ + ret = sba_prealloc_channel_resources(sba); if (ret) goto fail_free_mchans; - /* Prealloc channel resource */ - ret = sba_prealloc_channel_resources(sba); + /* Register DMA device with Linux async framework */ + ret = sba_async_register(sba); if (ret) - goto fail_async_dev_unreg; + goto fail_free_resources; /* Print device info */ dev_info(sba->dev, "%s using SBAv%d and %d mailbox channels", @@ -1754,8 +1754,8 @@ static int sba_probe(struct platform_device *pdev) return 0; -fail_async_dev_unreg: - dma_async_device_unregister(&sba->dma_dev); +fail_free_resources: + sba_freeup_channel_resources(sba); fail_free_mchans: for (i = 0; i < sba->mchans_count; i++) mbox_free_channel(sba->mchans[i]); @@ -1767,10 +1767,10 @@ static int sba_remove(struct platform_device *pdev) int i; struct sba_device *sba = platform_get_drvdata(pdev); - sba_freeup_channel_resources(sba); - dma_async_device_unregister(&sba->dma_dev); + sba_freeup_channel_resources(sba); + for (i = 0; i < sba->mchans_count; i++) mbox_free_channel(sba->mchans[i]); |
