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PCI: endpoint: Use sysfs_emit() in "show" functions

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Convert sprintf() in sysfs "show" functions to sysfs_emit() in order to
check for buffer overruns in sysfs outputs.

Link: https://lore.kernel.org/r/1630472957-26857-1-git-send-email-hayashi.kunihiko@socionext.com
Signed-off-by: Kunihiko Hayashi <hayashi.kunihiko@socionext.com>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Reviewed-by: Krzysztof Wilczyński <kw@linux.com>
This commit is contained in:
Kunihiko Hayashi 2021-09-01 14:09:17 +09:00 committed by Lorenzo Pieralisi
parent e4e737bb5c
commit a2258831d1
2 changed files with 8 additions and 9 deletions
drivers/pci/endpoint
functions
pci-epf-ntb.c
pci-ep-cfs.c

4
drivers/pci/endpoint/functions/pci-epf-ntb.c
View File

@ -1937,7 +1937,7 @@ static ssize_t epf_ntb_##_name##_show(struct config_item *item, \
struct config_group *group = to_config_group(item); \
struct epf_ntb *ntb = to_epf_ntb(group); \
\
return sprintf(page, "%d\n", ntb->_name); \
return sysfs_emit(page, "%d\n", ntb->_name); \
}
#define EPF_NTB_W(_name) \
@ -1968,7 +1968,7 @@ static ssize_t epf_ntb_##_name##_show(struct config_item *item, \
\
sscanf(#_name, "mw%d", &win_no); \
\
return sprintf(page, "%lld\n", ntb->mws_size[win_no - 1]); \
return sysfs_emit(page, "%lld\n", ntb->mws_size[win_no - 1]); \
}
#define EPF_NTB_MW_W(_name) \

13
drivers/pci/endpoint/pci-ep-cfs.c
View File

@ -198,8 +198,7 @@ static ssize_t pci_epc_start_store(struct config_item *item, const char *page,
static ssize_t pci_epc_start_show(struct config_item *item, char *page)
{
return sprintf(page, "%d\n",
to_pci_epc_group(item)->start);
return sysfs_emit(page, "%d\n", to_pci_epc_group(item)->start);
}
CONFIGFS_ATTR(pci_epc_, start);
@ -321,7 +320,7 @@ static ssize_t pci_epf_##_name##_show(struct config_item *item, char *page) \
struct pci_epf *epf = to_pci_epf_group(item)->epf; \
if (WARN_ON_ONCE(!epf->header)) \
return -EINVAL; \
return sprintf(page, "0x%04x\n", epf->header->_name); \
return sysfs_emit(page, "0x%04x\n", epf->header->_name); \
}
#define PCI_EPF_HEADER_W_u32(_name) \
@ -390,8 +389,8 @@ static ssize_t pci_epf_msi_interrupts_store(struct config_item *item,
static ssize_t pci_epf_msi_interrupts_show(struct config_item *item,
char *page)
{
return sprintf(page, "%d\n",
to_pci_epf_group(item)->epf->msi_interrupts);
return sysfs_emit(page, "%d\n",
to_pci_epf_group(item)->epf->msi_interrupts);
}
static ssize_t pci_epf_msix_interrupts_store(struct config_item *item,
@ -412,8 +411,8 @@ static ssize_t pci_epf_msix_interrupts_store(struct config_item *item,
static ssize_t pci_epf_msix_interrupts_show(struct config_item *item,
char *page)
{
return sprintf(page, "%d\n",
to_pci_epf_group(item)->epf->msix_interrupts);
return sysfs_emit(page, "%d\n",
to_pci_epf_group(item)->epf->msix_interrupts);
}
PCI_EPF_HEADER_R(vendorid)