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dmaengine: ptdma: Fix the error handling path in pt_core_init()

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In order to free resources correctly in the error handling path of
pt_core_init(), 2 goto's have to be switched. Otherwise, some resources
will leak and we will try to release things that have not been allocated
yet.

Also move a dev_err() to a place where it is more meaningful.

Fixes: fa5d823b16 ("dmaengine: ptdma: Initial driver for the AMD PTDMA")
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Acked-by: Sanjay R Mehta <sanju.mehta@amd.com>
Reviewed-by: Dan Carpenter <dan.carpenter@oracle.com>
Link: https://lore.kernel.org/r/41a963a35173f89c874f5c44df5530dc09fea8da.1644044244.git.christophe.jaillet@wanadoo.fr
Signed-off-by: Vinod Koul <vkoul@kernel.org>
This commit is contained in:
Christophe JAILLET 2022-02-05 07:58:44 +01:00 committed by Vinod Koul
parent e783362eb5
commit 3c62fd3406
1 changed files with 9 additions and 8 deletions
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17
drivers/dma/ptdma/ptdma-dev.c
View file

@ -207,7 +207,7 @@ int pt_core_init(struct pt_device *pt)
if (!cmd_q->qbase) {
dev_err(dev, "unable to allocate command queue\n");
ret = -ENOMEM;
goto e_dma_alloc;
goto e_destroy_pool;
}
cmd_q->qidx = 0;
@ -229,8 +229,10 @@ int pt_core_init(struct pt_device *pt)
/* Request an irq */
ret = request_irq(pt->pt_irq, pt_core_irq_handler, 0, dev_name(pt->dev), pt);
if (ret)
goto e_pool;
if (ret) {
dev_err(dev, "unable to allocate an IRQ\n");
goto e_free_dma;
}
/* Update the device registers with queue information. */
cmd_q->qcontrol &= ~CMD_Q_SIZE;
@ -250,21 +252,20 @@ int pt_core_init(struct pt_device *pt)
/* Register the DMA engine support */
ret = pt_dmaengine_register(pt);
if (ret)
goto e_dmaengine;
goto e_free_irq;
/* Set up debugfs entries */
ptdma_debugfs_setup(pt);
return 0;
e_dmaengine:
e_free_irq:
free_irq(pt->pt_irq, pt);
e_dma_alloc:
e_free_dma:
dma_free_coherent(dev, cmd_q->qsize, cmd_q->qbase, cmd_q->qbase_dma);
e_pool:
dev_err(dev, "unable to allocate an IRQ\n");
e_destroy_pool:
dma_pool_destroy(pt->cmd_q.dma_pool);
return ret;