From: Mike Frysinger <[email protected]>
Prevent people from setting bits in ctl_reg that the SPI
framework already handles, hopefully we can one day drop
ctl_reg completely
Signed-off-by: Mike Frysinger <[email protected]>
Signed-off-by: Bryan Wu <[email protected]>
---
drivers/spi/spi_bfin5xx.c | 10 ++++++++++
1 files changed, 10 insertions(+), 0 deletions(-)
diff --git a/drivers/spi/spi_bfin5xx.c b/drivers/spi/spi_bfin5xx.c
index 7093065..1a83656 100644
--- a/drivers/spi/spi_bfin5xx.c
+++ b/drivers/spi/spi_bfin5xx.c
@@ -996,6 +996,16 @@ static int setup(struct spi_device *spi)
/* chip_info isn't always needed */
if (chip_info) {
+ /* Make sure people stop trying to set fields via ctl_reg when they
+ * should actually be using common SPI framework. Currently we let
+ * through: WOM EMISO PSSE GM SZ TIMOD. Not sure if a user actually
+ * needs/uses any of these, but let's assume (for now) they do.
+ */
+ if (chip_info->ctl_reg & (SPE | MSTR | CPOL | CPHA | LSBF | SIZE)) {
+ dev_err(&spi->dev, "do not set bits in ctl_reg that the SPI framework provides\n");
+ return -EINVAL;
+ }
+
chip->enable_dma = chip_info->enable_dma != 0
&& drv_data->master_info->enable_dma;
chip->ctl_reg = chip_info->ctl_reg;
--
1.5.3.4
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [email protected]
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
[Index of Archives]
[Kernel Newbies]
[Netfilter]
[Bugtraq]
[Photo]
[Stuff]
[Gimp]
[Yosemite News]
[MIPS Linux]
[ARM Linux]
[Linux Security]
[Linux RAID]
[Video 4 Linux]
[Linux for the blind]
[Linux Resources]
