From 8d38d74b648513dd8ed8bd2b67d899208ef4e09e Mon Sep 17 00:00:00 2001 From: Chen Gong Date: Mon, 16 May 2011 10:58:57 -0700 Subject: pstore: fix one type of return value in pstore the return type of function _read_ in pstore is size_t, but in the callback function of _read_, the logic doesn't consider it too much, which means if negative value (assuming error here) is returned, it will be converted to positive because of type casting. ssize_t is enough for this function. Signed-off-by: Chen Gong Signed-off-by: Tony Luck --- drivers/acpi/apei/erst.c | 4 ++-- fs/pstore/platform.c | 4 ++-- include/linux/pstore.h | 2 +- 3 files changed, 5 insertions(+), 5 deletions(-) diff --git a/drivers/acpi/apei/erst.c b/drivers/acpi/apei/erst.c index d6cb0ff6988e..d5a89d067f98 100644 --- a/drivers/acpi/apei/erst.c +++ b/drivers/acpi/apei/erst.c @@ -929,7 +929,7 @@ static int erst_check_table(struct acpi_table_erst *erst_tab) return 0; } -static size_t erst_reader(u64 *id, enum pstore_type_id *type, +static ssize_t erst_reader(u64 *id, enum pstore_type_id *type, struct timespec *time); static u64 erst_writer(enum pstore_type_id type, size_t size); @@ -957,7 +957,7 @@ struct cper_pstore_record { char data[]; } __packed; -static size_t erst_reader(u64 *id, enum pstore_type_id *type, +static ssize_t erst_reader(u64 *id, enum pstore_type_id *type, struct timespec *time) { int rc; diff --git a/fs/pstore/platform.c b/fs/pstore/platform.c index f835a25625ff..912403c2a93d 100644 --- a/fs/pstore/platform.c +++ b/fs/pstore/platform.c @@ -152,7 +152,7 @@ EXPORT_SYMBOL_GPL(pstore_register); void pstore_get_records(void) { struct pstore_info *psi = psinfo; - size_t size; + ssize_t size; u64 id; enum pstore_type_id type; struct timespec time; @@ -163,7 +163,7 @@ void pstore_get_records(void) mutex_lock(&psinfo->buf_mutex); while ((size = psi->read(&id, &type, &time)) > 0) { - if (pstore_mkfile(type, psi->name, id, psi->buf, size, + if (pstore_mkfile(type, psi->name, id, psi->buf, (size_t)size, time, psi->erase)) failed++; } diff --git a/include/linux/pstore.h b/include/linux/pstore.h index 41977737bb7d..14ce2f5d08af 100644 --- a/include/linux/pstore.h +++ b/include/linux/pstore.h @@ -35,7 +35,7 @@ struct pstore_info { struct mutex buf_mutex; /* serialize access to 'buf' */ char *buf; size_t bufsize; - size_t (*read)(u64 *id, enum pstore_type_id *type, + ssize_t (*read)(u64 *id, enum pstore_type_id *type, struct timespec *time); u64 (*write)(enum pstore_type_id type, size_t size); int (*erase)(u64 id); -- cgit v1.2.1