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| author | Arnd Bergmann <arnd@arndb.de> | 2014-06-05 23:29:49 +0200 |
|---|---|---|
| committer | Christoph Hellwig <hch@lst.de> | 2014-07-25 17:16:56 -0400 |
| commit | 6919a3663a8f12d1c7677fc31e6a57dbd4423a95 (patch) | |
| tree | 88ec3a3f8bf302e725827b1afd0591742ea1f718 | |
| parent | d3814aaf5144b53c4ddebc52b88d12dcee2bfea8 (diff) | |
| download | linux-6919a3663a8f12d1c7677fc31e6a57dbd4423a95.tar.bz2 | |
NCR53c406a: don't call free_dma() by default
The NCR53c406a scsi driver normally does not use DMA, unless
the USE_PIO macro is disabled by modifying the source code.
The call to free_dma() for some reason uses #ifdef USE_DMA,
which does not do the right thing, since USE_DMA is defined
as a boolean that is either 0 or 1, but always present.
One case where it gets in the way is randconfig builds on ARM,
which depending on the configuration does not provide a free_dma()
function, causing this build error:
drivers/scsi/NCR53c406a.c: In function 'NCR53c406a_release':
drivers/scsi/NCR53c406a.c:600:3: error: implicit declaration of function 'free_dma' [-Werror=implicit-function-declaration]
free_dma(shost->dma_channel);
^
This changes the code to use #if USE_DMA, to match the
rest of the file, which seems to be what the author intended.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Finn Thain <fthain@telegraphics.com.au>
Signed-off-by: Christoph Hellwig <hch@lst.de>
| -rw-r--r-- | drivers/scsi/NCR53c406a.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/scsi/NCR53c406a.c b/drivers/scsi/NCR53c406a.c index 10c3374d759f..42c7161474f7 100644 --- a/drivers/scsi/NCR53c406a.c +++ b/drivers/scsi/NCR53c406a.c @@ -595,7 +595,7 @@ static int NCR53c406a_release(struct Scsi_Host *shost) { if (shost->irq) free_irq(shost->irq, NULL); -#ifdef USE_DMA +#if USE_DMA if (shost->dma_channel != 0xff) free_dma(shost->dma_channel); #endif |