On Tue, Aug 15, 2017 at 10:16:20PM +0800, gengdongjiu wrote:
> 2017-08-15 19:15 GMT+08:00, Dongjiu Geng <gengdongjiu@xxxxxxxxxx>:
> > The revision 0x300 generic error data entry is different
> > from the old version, but currently iterating through the
> > GHES estatus blocks does not take into account this difference.
> > This will lead to failure to get the right data entry if GHES
> > has revision 0x300 error data entry.
> >
> > Update the GHES estatus iteration to properly increment using
> > acpi_hest_get_next, and correct the iteration termination condition
> > because the status block data length only includes error data length.
> > Clear the CPER estatus printing iteration logic to use same macro.
> >
> > Signed-off-by: Dongjiu Geng <gengdongjiu@xxxxxxxxxx>
> > CC: Tyler Baicar <tbaicar@xxxxxxxxxxxxxx>
...
> > diff --git a/drivers/firmware/efi/cper.c b/drivers/firmware/efi/cper.c
> > index 48a8f69da42a..dff454321160 100644
> > --- a/drivers/firmware/efi/cper.c
> > +++ b/drivers/firmware/efi/cper.c
> > @@ -606,7 +606,6 @@ void cper_estatus_print(const char *pfx,
> > const struct acpi_hest_generic_status *estatus)
> > {
> > struct acpi_hest_generic_data *gdata;
> > - unsigned int data_len;
> > int sec_no = 0;
> > char newpfx[64];
> > __u16 severity;
> > @@ -617,14 +616,10 @@ void cper_estatus_print(const char *pfx,
> > "It has been corrected by h/w "
> > "and requires no further action");
> > printk("%s""event severity: %s\n", pfx, cper_severity_str(severity));
> > - data_len = estatus->data_length;
> > - gdata = (struct acpi_hest_generic_data *)(estatus + 1);
> > snprintf(newpfx, sizeof(newpfx), "%s%s", pfx, INDENT_SP);
> >
> > - while (data_len >= acpi_hest_get_size(gdata)) {
> > + apei_estatus_for_each_section(estatus, gdata) {
> > cper_estatus_print_section(newpfx, gdata, sec_no);
> > - data_len -= acpi_hest_get_record_size(gdata);
> > - gdata = acpi_hest_get_next(gdata);
> > sec_no++;
This one looks cleaner to me because it gets rid of all those
variables...
> > }
> > }
> > diff --git a/include/acpi/ghes.h b/include/acpi/ghes.h
> > index 9f26e01186ae..9061c5c743b3 100644
> > --- a/include/acpi/ghes.h
> > +++ b/include/acpi/ghes.h
> > @@ -113,6 +113,11 @@ static inline void *acpi_hest_get_next(struct
> > acpi_hest_generic_data *gdata)
> > return (void *)(gdata) + acpi_hest_get_record_size(gdata);
> > }
> >
> > +#define apei_estatus_for_each_section(estatus, section) \
> > + for (section = (struct acpi_hest_generic_data *)(estatus + 1); \
> > + (void *)section - (void *)(estatus + 1) < estatus->data_length; \
> > + section = acpi_hest_get_next(section))
... and uses that accessor.
Tyler?
I'd prefer if you guys merge your two patches, Tyler's from
https://marc.info/?l=linux-acpi&m=150179595323038&w=2 and this one into
a single one.
How does that sound?
--
Regards/Gruss,
Boris.
SUSE Linux GmbH, GF: Felix Imendörffer, Jane Smithard, Graham Norton, HRB 21284 (AG Nürnberg)
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