[PATCH 3/7] staging: gpib: pc2: avoid calling undefined dma_free()

[Arnd Bergmann <arnd@kernel.org>]

From: Arnd Bergmann <arnd@arndb.de>

On architectures that don't support the ISA DMA API, this causes a build
failure. The corresponding dma_alloc() call is already in an #ifdef,
so use the same one for dma_free().

Note that nothing seems to set PC2_DMA, so parts of this driver
are likely unused. ISA DMA usually does not work on PCI or PCMCIA
devices, only on physical ISA slots.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
 drivers/staging/gpib/pc2/pc2_gpib.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/staging/gpib/pc2/pc2_gpib.c b/drivers/staging/gpib/pc2/pc2_gpib.c
index cd70cedb4899..7b3b34f47341 100644
--- a/drivers/staging/gpib/pc2/pc2_gpib.c
+++ b/drivers/staging/gpib/pc2/pc2_gpib.c
@@ -462,8 +462,10 @@ void pc2_detach(gpib_board_t *board)
 
 	if (pc2_priv) {
 		nec_priv = &pc2_priv->nec7210_priv;
+#ifdef PC2_DMA
 		if (nec_priv->dma_channel)
 			free_dma(nec_priv->dma_channel);
+#endif
 		gpib_free_pseudo_irq(board);
 		if (pc2_priv->irq)
 			free_irq(pc2_priv->irq, board);
@@ -596,8 +598,10 @@ static void pc2a_common_detach(gpib_board_t *board, unsigned int num_registers)
 
 	if (pc2_priv) {
 		nec_priv = &pc2_priv->nec7210_priv;
+#ifdef PC2_DMA
 		if (nec_priv->dma_channel)
 			free_dma(nec_priv->dma_channel);
+#endif
 		gpib_free_pseudo_irq(board);
 		if (pc2_priv->irq)
 			free_irq(pc2_priv->irq, board);
-- 
2.39.5