| Message ID | 20230704120517.1322195-1-LeoLiu-oc@zhaoxin.com (mailing list archive) |
|---|---|
| State | Superseded, archived |
| Headers | show |
| Series | Parse the PCIe AER and set to relevant registers | expand |
On Tue, Jul 04, 2023 at 08:05:17PM +0800, LeoLiu-oc wrote: > From: leoliu-oc <leoliu-oc@zhaoxin.com> > > Each dev with AER capability needs to call the apei_hest_parse function to > match and extract register values from HEST PCIe AER structures. > Therefore, remove static from apei_hest_parse() so that it can be called > in another file. Can you reword the subject line and commit log in the positive? "Removing static" is a negative thing and it's semantically a bit too low level -- it's clearly what the *code* does, but we can see that from the patch, and what we want to know here is *why* it's important. What this really does is expose apei_hest_parse() for use by other subsystems. Browsing the drivers/acpi commit log history, I see that Rafael adds "()" after function names, so please do the same here (you did do that once above, but not in the first line). > Signed-off-by: leoliu-oc <leoliu-oc@zhaoxin.com> > --- > drivers/acpi/apei/hest.c | 2 +- > include/acpi/apei.h | 5 +++++ > 2 files changed, 6 insertions(+), 1 deletion(-) > > diff --git a/drivers/acpi/apei/hest.c b/drivers/acpi/apei/hest.c > index fb839a5c480ee..fd40c035c9b2e 100644 > --- a/drivers/acpi/apei/hest.c > +++ b/drivers/acpi/apei/hest.c > @@ -132,7 +132,7 @@ static bool hest_match_pci(struct acpi_hest_header *hest_hdr, > return false; > } > > -static int apei_hest_parse(apei_hest_func_t func, void *data) > +int apei_hest_parse(apei_hest_func_t func, void *data) If this is going to exported to the PCI subsystem, I think it needs some kernel-doc. For example, it's important to know that it stops parsing the HEST if func returns anything non-zero. This is how pci_acpi_program_hest_aer_params() knows that it got good data that matches the device it wants. Given the fact that apei_hest_parse_aer() fills in the struct acpi_hest_parse_aer_info with pointers into the HEST table data, it's also important to know that this HEST table data is persistent. > { > struct acpi_hest_header *hest_hdr; > int i, rc, len; > diff --git a/include/acpi/apei.h b/include/acpi/apei.h > index 8a0b2b9edbafe..f975e4fe78fcb 100644 > --- a/include/acpi/apei.h > +++ b/include/acpi/apei.h > @@ -37,9 +37,14 @@ typedef int (*apei_hest_func_t)(struct acpi_hest_header *hest_hdr, void *data); > > #ifdef CONFIG_ACPI_APEI > void __init acpi_hest_init(void); > +int apei_hest_parse(apei_hest_func_t func, void *data); > int apei_hest_parse_aer(struct acpi_hest_header *hest_hdr, void *data); > #else > static inline void acpi_hest_init(void) { } > +static inline int apei_hest_parse(apei_hest_func_t func, void *data) > +{ > + return -EINVAL; > +} > static inline int apei_hest_parse_aer(struct acpi_hest_header *hest_hdr, void *data) > { > return -EINVAL; > -- > 2.34.1 >
在 2023/8/11 7:17, Bjorn Helgaas 写道: > On Tue, Jul 04, 2023 at 08:05:17PM +0800, LeoLiu-oc wrote: >> From: leoliu-oc <leoliu-oc@zhaoxin.com> >> >> Each dev with AER capability needs to call the apei_hest_parse function to >> match and extract register values from HEST PCIe AER structures. >> Therefore, remove static from apei_hest_parse() so that it can be called >> in another file. > > Can you reword the subject line and commit log in the positive? > "Removing static" is a negative thing and it's semantically a bit too > low level -- it's clearly what the *code* does, but we can see that > from the patch, and what we want to know here is *why* it's important. > What this really does is expose apei_hest_parse() for use by other > subsystems. > > Browsing the drivers/acpi commit log history, I see that Rafael adds > "()" after function names, so please do the same here (you did do that > once above, but not in the first line). > This function is required in patch v3 4/5 to traverse the HEST to find the HEST AER structures, so changed the definition to be global. I will pay attention to this matter in the next version. LeoLiu-oc >> Signed-off-by: leoliu-oc <leoliu-oc@zhaoxin.com> >> --- >> drivers/acpi/apei/hest.c | 2 +- >> include/acpi/apei.h | 5 +++++ >> 2 files changed, 6 insertions(+), 1 deletion(-) >> >> diff --git a/drivers/acpi/apei/hest.c b/drivers/acpi/apei/hest.c >> index fb839a5c480ee..fd40c035c9b2e 100644 >> --- a/drivers/acpi/apei/hest.c >> +++ b/drivers/acpi/apei/hest.c >> @@ -132,7 +132,7 @@ static bool hest_match_pci(struct acpi_hest_header *hest_hdr, >> return false; >> } >> >> -static int apei_hest_parse(apei_hest_func_t func, void *data) >> +int apei_hest_parse(apei_hest_func_t func, void *data) > > If this is going to exported to the PCI subsystem, I think it needs > some kernel-doc. For example, it's important to know that it stops > parsing the HEST if func returns anything non-zero. This is how > pci_acpi_program_hest_aer_params() knows that it got good data that > matches the device it wants. > > Given the fact that apei_hest_parse_aer() fills in the struct > acpi_hest_parse_aer_info with pointers into the HEST table data, it's > also important to know that this HEST table data is persistent. > Thank you suggestion, and I will consider carefully. Best Regards. LeoLiu-oc >> { >> struct acpi_hest_header *hest_hdr; >> int i, rc, len; >> diff --git a/include/acpi/apei.h b/include/acpi/apei.h >> index 8a0b2b9edbafe..f975e4fe78fcb 100644 >> --- a/include/acpi/apei.h >> +++ b/include/acpi/apei.h >> @@ -37,9 +37,14 @@ typedef int (*apei_hest_func_t)(struct acpi_hest_header *hest_hdr, void *data); >> >> #ifdef CONFIG_ACPI_APEI >> void __init acpi_hest_init(void); >> +int apei_hest_parse(apei_hest_func_t func, void *data); >> int apei_hest_parse_aer(struct acpi_hest_header *hest_hdr, void *data); >> #else >> static inline void acpi_hest_init(void) { } >> +static inline int apei_hest_parse(apei_hest_func_t func, void *data) >> +{ >> + return -EINVAL; >> +} >> static inline int apei_hest_parse_aer(struct acpi_hest_header *hest_hdr, void *data) >> { >> return -EINVAL; >> -- >> 2.34.1 >>
diff --git a/drivers/acpi/apei/hest.c b/drivers/acpi/apei/hest.c index fb839a5c480ee..fd40c035c9b2e 100644 --- a/drivers/acpi/apei/hest.c +++ b/drivers/acpi/apei/hest.c @@ -132,7 +132,7 @@ static bool hest_match_pci(struct acpi_hest_header *hest_hdr, return false; } -static int apei_hest_parse(apei_hest_func_t func, void *data) +int apei_hest_parse(apei_hest_func_t func, void *data) { struct acpi_hest_header *hest_hdr; int i, rc, len; diff --git a/include/acpi/apei.h b/include/acpi/apei.h index 8a0b2b9edbafe..f975e4fe78fcb 100644 --- a/include/acpi/apei.h +++ b/include/acpi/apei.h @@ -37,9 +37,14 @@ typedef int (*apei_hest_func_t)(struct acpi_hest_header *hest_hdr, void *data); #ifdef CONFIG_ACPI_APEI void __init acpi_hest_init(void); +int apei_hest_parse(apei_hest_func_t func, void *data); int apei_hest_parse_aer(struct acpi_hest_header *hest_hdr, void *data); #else static inline void acpi_hest_init(void) { } +static inline int apei_hest_parse(apei_hest_func_t func, void *data) +{ + return -EINVAL; +} static inline int apei_hest_parse_aer(struct acpi_hest_header *hest_hdr, void *data) { return -EINVAL;