Messages in this thread | | | Date | Sat, 4 Mar 2017 16:06:34 -0800 | From | Alison Schofield <> | Subject | Re: [Outreachy kernel] Re: [PATCH v2 4/6] staging: fbtft: Fix sparse warnings of incorrect type in assignment |
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On Thu, Mar 02, 2017 at 02:26:37PM +0100, Noralf Trønnes wrote: > > Den 02.03.2017 14.04, skrev simran singhal: > >This patch fixes the following sparse warnings: > > > >drivers/staging/fbtft/fbtft-bus.c:166:36: warning: incorrect type in assignment (different base types) > >drivers/staging/fbtft/fbtft-bus.c:166:36: expected unsigned short [unsigned] [short] [usertype] <noident> > >drivers/staging/fbtft/fbtft-bus.c:166:36: got restricted __be16 [usertype] <noident> > > > >drivers/staging/fbtft/fbtft-io.c:74:29: warning: incorrect type in assignment (different base types) > >drivers/staging/fbtft/fbtft-io.c:74:29: expected unsigned long long [unsigned] [long] [long long] [usertype] <noident> > >drivers/staging/fbtft/fbtft-io.c:74:29: got restricted __be64 [usertype] <noident> > > > >Signed-off-by: simran singhal <singhalsimran0@gmail.com> > >--- > > v2: > > -changed commit message > > > > drivers/staging/fbtft/fbtft-bus.c | 2 +- > > drivers/staging/fbtft/fbtft-io.c | 2 +- > > 2 files changed, 2 insertions(+), 2 deletions(-) > > > >diff --git a/drivers/staging/fbtft/fbtft-bus.c b/drivers/staging/fbtft/fbtft-bus.c > >index ec45043..df2223e 100644 > >--- a/drivers/staging/fbtft/fbtft-bus.c > >+++ b/drivers/staging/fbtft/fbtft-bus.c > >@@ -163,7 +163,7 @@ int fbtft_write_vmem16_bus8(struct fbtft_par *par, size_t offset, size_t len) > > to_copy, remain - to_copy); > > for (i = 0; i < to_copy; i++) > >- txbuf16[i] = cpu_to_be16(vmem16[i]); > >+ txbuf16[i] = vmem16[i]; > > This change breaks functionality on little endian machines like > the Raspberry Pi. > > > Noralf. >
Hi Simran,
It's probably good to get back to this one while we have Noralf's attention.
While the change above - in fbtft-bus.c is a problem, the change below in fbtft-io.c looks ok. So, compare what you did. You can't *not* do the endian conversion.
This is a cleanup change, a cosmetic change. There is no underlying bug, so you just need to get the typing correct w/out affecting behavior.
BTW: I think it's OK to pull this one out and send a v3 of this alone. That would mean abandoning the patchset and doing them one at a time. They are all in different drivers anyway.
alisons
> > vmem16 = vmem16 + to_copy; > > ret = par->fbtftops.write(par, par->txbuf.buf, > >diff --git a/drivers/staging/fbtft/fbtft-io.c b/drivers/staging/fbtft/fbtft-io.c > >index d868405..ffb9a3b 100644 > >--- a/drivers/staging/fbtft/fbtft-io.c > >+++ b/drivers/staging/fbtft/fbtft-io.c > >@@ -71,7 +71,7 @@ int fbtft_write_spi_emulate_9(struct fbtft_par *par, void *buf, size_t len) > > src++; > > } > > tmp |= ((*src & 0x0100) ? 1 : 0); > >- *(u64 *)dst = cpu_to_be64(tmp); > >+ *(__be64 *)dst = cpu_to_be64(tmp); > > dst += 8; > > *dst++ = (u8)(*src++ & 0x00FF); > > added++; > > -- > You received this message because you are subscribed to the Google Groups "outreachy-kernel" group. > To unsubscribe from this group and stop receiving emails from it, send an email to outreachy-kernel+unsubscribe@googlegroups.com. > To post to this group, send email to outreachy-kernel@googlegroups.com. > To view this discussion on the web visit https://groups.google.com/d/msgid/outreachy-kernel/fe8d6a85-3d4e-8019-937b-22389b942da3%40tronnes.org. > For more options, visit https://groups.google.com/d/optout.
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