[PATCH 10/32] advansys fix on ISA-less configs

From: Al Viro
Date: Sat Nov 22 2008 - 12:36:32 EST



if (shost->dma_channel != NO_ISA_DMA)
free_dma(shost->dma_channel);

in there is triggerable only if we have CONFIG_ISA (we only set ->dma_channel to
something other than NO_ISA_DMA under #ifdef CONFIG_ISA). OTOH, free_dma() is
not guaranteed to be there in absense of CONFIG_ISA. IOW, driver runs into
undefined symbols on PCI-but-not-ISA configs (e.g. on frv) and it's a false
positive.

Fix: put the entire if () under #ifdef CONFIG_ISA; behaviour doesn't change and
dependency on free_dma() disappears for !CONFIG_ISA.

Signed-off-by: Al Viro <viro@xxxxxxxxxxxxxxxxxx>
---
drivers/scsi/advansys.c | 4 ++++
1 files changed, 4 insertions(+), 0 deletions(-)

diff --git a/drivers/scsi/advansys.c b/drivers/scsi/advansys.c
--- a/drivers/scsi/advansys.c
+++ b/drivers/scsi/advansys.c
@@ -13872,8 +13872,10 @@ static int __devinit advansys_board_found(struct Scsi_Host *shost,
advansys_wide_free_mem(boardp);
free_irq(boardp->irq, shost);
err_free_dma:
+#ifdef CONFIG_ISA
if (shost->dma_channel != NO_ISA_DMA)
free_dma(shost->dma_channel);
+#endif
err_free_proc:
kfree(boardp->prtbuf);
err_unmap:
@@ -13894,10 +13896,12 @@ static int advansys_release(struct Scsi_Host *shost)
ASC_DBG(1, "begin\n");
scsi_remove_host(shost);
free_irq(board->irq, shost);
+#ifdef CONFIG_ISA
if (shost->dma_channel != NO_ISA_DMA) {
ASC_DBG(1, "free_dma()\n");
free_dma(shost->dma_channel);
}
+#endif
if (ASC_NARROW_BOARD(board)) {
dma_unmap_single(board->dev,
board->dvc_var.asc_dvc_var.overrun_dma,
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