On Thu, Feb 17, 2022 at 12:06:09PM +0800, Chuanhong Guo wrote:
> Hi!
>
> On Thu, Feb 17, 2022 at 3:57 AM Thomas Bogendoerfer
> <tsbogend@xxxxxxxxxxxxxxxx> wrote:
> >
> > On Fri, Feb 11, 2022 at 08:13:44AM +0800, Chuanhong Guo wrote:
> > > It's reported that current memory detection code occasionally detects
> > > larger memory under some bootloaders.
> > > Current memory detection code tests whether address space wraps around
> > > on KSEG0, which is unreliable because it's cached.
> > >
> > > Rewrite memory size detection to perform the same test on KSEG1 instead.
> > > While at it, this patch also does the following two things:
> > > 1. use a fixed pattern instead of a random function pointer as the magic
> > > value.
> > > 2. add an additional memory write and a second comparison as part of the
> > > test to prevent possible smaller memory detection result due to
> > > leftover values in memory.
> > >
> > > Fixes: 139c949f7f0a MIPS: ("ralink: mt7621: add memory detection support")
> > > Reported-by: Rui Salvaterra <rsalvaterra@xxxxxxxxx>
> > > Signed-off-by: Chuanhong Guo <gch981213@xxxxxxxxx>
> > > ---
> > > arch/mips/ralink/mt7621.c | 36 +++++++++++++++++++++++-------------
> > > 1 file changed, 23 insertions(+), 13 deletions(-)
> >
> > applied to mips-fixes.
>
> Oops.
>
> As I mentioned in a previous mail, this patch has two cosmetic problems:
> 1. misplaced bracket in commit message "Fixes" tag
> 2. incorrect second test pattern: I meant to flip all the bits in the
> first pattern,
> but I used "!" instead of "~". Any value will work just fine but it
> looks weird
> to construct a zero using !MT7621_MEM_TEST_PATTERN.
>
> Should I send a second patch to fix this patch or send a v2 of the
> original patch?
a second patch please.
Thomas.
--
Crap can work. Given enough thrust pigs will fly, but it's not necessarily a
good idea. [ RFC1925, 2.3 ]
