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leon, grspw_pkt: fixed error return path in dma_open

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This commit is contained in:
Daniel Hellstrom
2016-03-22 16:07:51 +01:00
parent ac7da5bcb0
commit 57e1f4c30b
1 changed files with 31 additions and 12 deletions
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43
c/src/lib/libbsp/sparc/shared/spw/grspw_pkt.c
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@@ -1651,24 +1651,28 @@ void *grspw_dma_open(void *d, int chan_no)
dma->cfg.tx_irq_en_cnt = 0;
dma->cfg.flags = DMAFLAG_NO_SPILL;
/* set to NULL so that error exit works correctly */
dma->sem_dma = RTEMS_ID_NONE;
dma->rx_wait.sem_wait = RTEMS_ID_NONE;
dma->tx_wait.sem_wait = RTEMS_ID_NONE;
dma->rx_ring_base = NULL;
/* DMA Channel Semaphore created with count = 1 */
if (rtems_semaphore_create(
rtems_build_name('S', 'D', '0' + priv->index, '0' + chan_no), 1,
RTEMS_FIFO | RTEMS_SIMPLE_BINARY_SEMAPHORE | \
RTEMS_NO_INHERIT_PRIORITY | RTEMS_LOCAL | \
RTEMS_NO_PRIORITY_CEILING, 0, &dma->sem_dma) != RTEMS_SUCCESSFUL) {
dma = NULL;
goto out;
dma->sem_dma = RTEMS_ID_NONE;
goto err;
}
/* Allocate memory for the two descriptor rings */
size = sizeof(struct grspw_ring) * (GRSPW_RXBD_NR + GRSPW_TXBD_NR);
dma->rx_ring_base = (struct grspw_rxring *)malloc(size);
dma->tx_ring_base = (struct grspw_txring *)&dma->rx_ring_base[GRSPW_RXBD_NR];
if (dma->rx_ring_base == NULL) {
dma = NULL;
goto out;
}
if (dma->rx_ring_base == NULL)
goto err;
/* Create DMA RX and TX Channel sempahore with count = 0 */
if (rtems_semaphore_create(
@@ -1676,16 +1680,16 @@ void *grspw_dma_open(void *d, int chan_no)
RTEMS_FIFO | RTEMS_SIMPLE_BINARY_SEMAPHORE | \
RTEMS_NO_INHERIT_PRIORITY | RTEMS_LOCAL | \
RTEMS_NO_PRIORITY_CEILING, 0, &dma->rx_wait.sem_wait) != RTEMS_SUCCESSFUL) {
dma = NULL;
goto out;
dma->rx_wait.sem_wait = RTEMS_ID_NONE;
goto err;
}
if (rtems_semaphore_create(
rtems_build_name('S', 'T', '0' + priv->index, '0' + chan_no), 0,
RTEMS_FIFO | RTEMS_SIMPLE_BINARY_SEMAPHORE | \
RTEMS_NO_INHERIT_PRIORITY | RTEMS_LOCAL | \
RTEMS_NO_PRIORITY_CEILING, 0, &dma->tx_wait.sem_wait) != RTEMS_SUCCESSFUL) {
dma = NULL;
goto out;
dma->tx_wait.sem_wait = RTEMS_ID_NONE;
goto err;
}
/* Reset software structures */
@@ -1698,6 +1702,19 @@ out:
rtems_semaphore_release(grspw_sem);
return dma;
/* initialization error happended */
err:
if (dma->sem_dma != RTEMS_ID_NONE)
rtems_semaphore_delete(dma->sem_dma);
if (dma->rx_wait.sem_wait != RTEMS_ID_NONE)
rtems_semaphore_delete(dma->rx_wait.sem_wait);
if (dma->tx_wait.sem_wait != RTEMS_ID_NONE)
rtems_semaphore_delete(dma->tx_wait.sem_wait);
if (dma->rx_ring_base)
free(dma->rx_ring_base);
dma = NULL;
goto out;
}
/* Initialize Software Structures:
@@ -1751,7 +1768,9 @@ void grspw_dma_close(void *c)
/* Free resources */
rtems_semaphore_delete(dma->rx_wait.sem_wait);
rtems_semaphore_delete(dma->tx_wait.sem_wait);
rtems_semaphore_delete(dma->sem_dma); /* Release and delete lock */
/* Release and delete lock. Operations requiring lock will fail */
rtems_semaphore_delete(dma->sem_dma);
dma->sem_dma = RTEMS_ID_NONE;
/* Free memory */
if (dma->rx_ring_base)
@@ -2941,7 +2960,7 @@ static int grspw_common_init(void)
if (rtems_task_start(grspw_work_task, grspw_work_func, 0) !=
RTEMS_SUCCESSFUL)
return -1;
}
}
grspw_initialized = 1;
return 0;