diff options
| author |   Will Deacon <will.deacon@arm.com> | 2013-10-11 14:52:20 +0100 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2013-10-11 17:50:59 -0400 |
| commit | e9e4ea74f06635f2ffc1dffe5ef40c854faa0a90 (patch) | |
| tree | 7f07c52efa9d265d81faf0a732778a1597da9f43 | |
| parent | farsync: fix info leak in ioctl (diff) | |
| download | linux-dev-e9e4ea74f06635f2ffc1dffe5ef40c854faa0a90.tar.xz linux-dev-e9e4ea74f06635f2ffc1dffe5ef40c854faa0a90.zip | |
net: smc91x: dont't use SMC_outw for fixing up halfword-aligned data
SMC_outw invokes an endian-aware I/O accessor, which may change the data
endianness before writing to the device. This is not suitable for data
transfers where the memory buffer is simply a string of bytes that does
not require any byte-swapping.
This patches fixes the smc91x SMC_PUSH_DATA macro so that it uses the
string I/O accessor for outputting the leading or trailing halfwords on
halfword-aligned buffers.
Cc: <netdev@vger.kernel.org>
Cc: Nicolas Pitre <nico@fluxnic.net>
Cc: David S. Miller <davem@davemloft.net>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Acked-by: Nicolas Pitre <nico@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | drivers/net/ethernet/smsc/smc91x.h | 6 |
1 files changed, 2 insertions, 4 deletions
diff --git a/drivers/net/ethernet/smsc/smc91x.h b/drivers/net/ethernet/smsc/smc91x.h index 5730fe2445a6..98eedb90cdc3 100644 --- a/drivers/net/ethernet/smsc/smc91x.h +++ b/drivers/net/ethernet/smsc/smc91x.h @@ -1124,8 +1124,7 @@ static const char * chip_ids[ 16 ] = { void __iomem *__ioaddr = ioaddr; \ if (__len >= 2 && (unsigned long)__ptr & 2) { \ __len -= 2; \ - SMC_outw(*(u16 *)__ptr, ioaddr, \ - DATA_REG(lp)); \ + SMC_outsw(ioaddr, DATA_REG(lp), __ptr, 1); \ __ptr += 2; \ } \ if (SMC_CAN_USE_DATACS && lp->datacs) \ @@ -1133,8 +1132,7 @@ static const char * chip_ids[ 16 ] = { SMC_outsl(__ioaddr, DATA_REG(lp), __ptr, __len>>2); \ if (__len & 2) { \ __ptr += (__len & ~3); \ - SMC_outw(*((u16 *)__ptr), ioaddr, \ - DATA_REG(lp)); \ + SMC_outsw(ioaddr, DATA_REG(lp), __ptr, 1); \ } \ } else if (SMC_16BIT(lp)) \ SMC_outsw(ioaddr, DATA_REG(lp), p, (l) >> 1); \ |