On Sat, Aug 30, 2014 at 01:32:16PM -0700, Greg KH wrote: > On Wed, Aug 20, 2014 at 11:17:53PM +0100, Mark Einon wrote: > > Replace a long list of contiguous writel() calls with a for loop iterating > > over the same values. > > > > Signed-off-by: Mark Einon <mark.einon@xxxxxxxxx> > > --- > > drivers/staging/et131x/et131x.c | 27 +++------------------------ > > 1 file changed, 3 insertions(+), 24 deletions(-) > > > > diff --git a/drivers/staging/et131x/et131x.c b/drivers/staging/et131x/et131x.c > > index fffe763..44cc684 100644 > > --- a/drivers/staging/et131x/et131x.c > > +++ b/drivers/staging/et131x/et131x.c > > @@ -1138,6 +1138,7 @@ static void et1310_config_rxmac_regs(struct et131x_adapter *adapter) > > u32 sa_lo; > > u32 sa_hi = 0; > > u32 pf_ctrl = 0; > > + u32 *wolw; > > > > /* Disable the MAC while it is being configured (also disable WOL) */ > > writel(0x8, &rxmac->ctrl); > > @@ -1151,30 +1152,8 @@ static void et1310_config_rxmac_regs(struct et131x_adapter *adapter) > > * its default Values of 0x00000000 because there are not WOL masks > > * as of this time. > > */ > > - writel(0, &rxmac->mask0_word0); > > - writel(0, &rxmac->mask0_word1); > > - writel(0, &rxmac->mask0_word2); > > - writel(0, &rxmac->mask0_word3); > > - > > - writel(0, &rxmac->mask1_word0); > > - writel(0, &rxmac->mask1_word1); > > - writel(0, &rxmac->mask1_word2); > > - writel(0, &rxmac->mask1_word3); > > - > > - writel(0, &rxmac->mask2_word0); > > - writel(0, &rxmac->mask2_word1); > > - writel(0, &rxmac->mask2_word2); > > - writel(0, &rxmac->mask2_word3); > > - > > - writel(0, &rxmac->mask3_word0); > > - writel(0, &rxmac->mask3_word1); > > - writel(0, &rxmac->mask3_word2); > > - writel(0, &rxmac->mask3_word3); > > - > > - writel(0, &rxmac->mask4_word0); > > - writel(0, &rxmac->mask4_word1); > > - writel(0, &rxmac->mask4_word2); > > - writel(0, &rxmac->mask4_word3); > > + for (wolw = &rxmac->mask0_word0; wolw <= &rxmac->mask4_word3; wolw++) > > + writel(0, wolw); > > You are now only writing to all locations 1 time, instead of 4 times, > like before, are you sure that is ok? Hardware is flaky, sometimes it > wants to be written to multiple times... Hi Greg, Thanks for the review. As far as my understanding goes, the new code is equivalent to the old code - it's a little confusing that the name refers to a word, but the masks are all 32 bit values, and the loop iterates over the contiguous list of masks found in txmac_regs (et131x.h:891 - the masks are also unused in the driver after being set). Or am I missing something here? Cheers, Mark _______________________________________________ devel mailing list devel@xxxxxxxxxxxxxxxxxxxxxx http://driverdev.linuxdriverproject.org/mailman/listinfo/driverdev-devel
