The sysfs_emit() and sysfs_emit_at() functions were introduced to make
it less ambiguous which function is preferred when writing to the output
buffer in a device attribute's "show" callback [1].
Convert the PCI sysfs object "show" functions from sprintf(), snprintf()
and scnprintf() to sysfs_emit() and sysfs_emit_at() accordingly, as the
latter is aware of the PAGE_SIZE buffer and correctly returns the number
of bytes written into the buffer.
No functional change intended.
[1] Documentation/filesystems/sysfs.rst
Related to:
commit ad025f8e46f3 ("PCI/sysfs: Use sysfs_emit() and sysfs_emit_at() in "show" functions")
Signed-off-by: Krzysztof Wilczyński <kw@xxxxxxxxx>
Reviewed-by: Logan Gunthorpe <logang@xxxxxxxxxxxx>
---
Changes in v2:
None.
Changes in v3:
Added Logan Gunthorpe's "Reviewed-by".
drivers/pci/pcie/aer.c | 20 +++++++++++---------
1 file changed, 11 insertions(+), 9 deletions(-)
diff --git a/drivers/pci/pcie/aer.c b/drivers/pci/pcie/aer.c
index ec943cee5ecc..40ef7bed7a77 100644
--- a/drivers/pci/pcie/aer.c
+++ b/drivers/pci/pcie/aer.c
@@ -529,21 +529,23 @@ static const char *aer_agent_string[] = {
char *buf) \
{ \
unsigned int i; \
- char *str = buf; \
struct pci_dev *pdev = to_pci_dev(dev); \
u64 *stats = pdev->aer_stats->stats_array; \
+ size_t len = 0; \
\
for (i = 0; i < ARRAY_SIZE(strings_array); i++) { \
if (strings_array[i]) \
- str += sprintf(str, "%s %llu\n", \
- strings_array[i], stats[i]); \
+ len += sysfs_emit_at(buf, len, "%s %llu\n", \
+ strings_array[i], \
+ stats[i]); \
else if (stats[i]) \
- str += sprintf(str, #stats_array "_bit[%d] %llu\n",\
- i, stats[i]); \
+ len += sysfs_emit_at(buf, len, \
+ #stats_array "_bit[%d] %llu\n",\
+ i, stats[i]); \
} \
- str += sprintf(str, "TOTAL_%s %llu\n", total_string, \
- pdev->aer_stats->total_field); \
- return str-buf; \
+ len += sysfs_emit_at(buf, len, "TOTAL_%s %llu\n", total_string, \
+ pdev->aer_stats->total_field); \
+ return len; \
} \
static DEVICE_ATTR_RO(name)
@@ -563,7 +565,7 @@ aer_stats_dev_attr(aer_dev_nonfatal, dev_nonfatal_errs,
char *buf) \
{ \
struct pci_dev *pdev = to_pci_dev(dev); \
- return sprintf(buf, "%llu\n", pdev->aer_stats->field); \
+ return sysfs_emit(buf, "%llu\n", pdev->aer_stats->field); \
} \
static DEVICE_ATTR_RO(name)
--
2.31.1
