add mtd_read(), mtd_write(), mtd_erase(), mtd_block_markbad() to fail_function list for testing purpose
- Specify the function to inject the fault echo mtd_read > /sys/kernel/debug/fail_function/inject
- Specifies the return value of the function to inject the fault printf %#x -12 > /sys/kernel/debug/fail_function/mtd_read/retval
- Specify other fault injection configuration parameters. echo -1 > /sys/kernel/debug/fail_function/times echo 100 > /sys/kernel/debug/fail_function/probability echo 15 > /sys/kernel/debug/fail_function/space
Signed-off-by: ZhaoLong Wang wangzhaolong1@huawei.com Reviewed-by: Zhihao Cheng chengzhihao1@huawei.com --- drivers/mtd/mtdcore.c | 5 +++++ 1 file changed, 5 insertions(+)
diff --git a/drivers/mtd/mtdcore.c b/drivers/mtd/mtdcore.c index 9bd661be3ae9..12d997278b2d 100644 --- a/drivers/mtd/mtdcore.c +++ b/drivers/mtd/mtdcore.c @@ -30,6 +30,7 @@ #include <linux/debugfs.h> #include <linux/nvmem-provider.h> #include <linux/root_dev.h> +#include <linux/error-injection.h>
#include <linux/mtd/mtd.h> #include <linux/mtd/partitions.h> @@ -1411,6 +1412,7 @@ int mtd_erase(struct mtd_info *mtd, struct erase_info *instr) return ret; } EXPORT_SYMBOL_GPL(mtd_erase); +ALLOW_ERROR_INJECTION(mtd_erase, ERRNO);
/* * This stuff for eXecute-In-Place. phys is optional and may be set to NULL. @@ -1508,6 +1510,7 @@ int mtd_read(struct mtd_info *mtd, loff_t from, size_t len, size_t *retlen, return ret; } EXPORT_SYMBOL_GPL(mtd_read); +ALLOW_ERROR_INJECTION(mtd_read, ERRNO);
int mtd_write(struct mtd_info *mtd, loff_t to, size_t len, size_t *retlen, const u_char *buf) @@ -1524,6 +1527,7 @@ int mtd_write(struct mtd_info *mtd, loff_t to, size_t len, size_t *retlen, return ret; } EXPORT_SYMBOL_GPL(mtd_write); +ALLOW_ERROR_INJECTION(mtd_write, ERRNO);
/* * In blackbox flight recorder like scenarios we want to make successful writes @@ -2344,6 +2348,7 @@ int mtd_block_markbad(struct mtd_info *mtd, loff_t ofs) return 0; } EXPORT_SYMBOL_GPL(mtd_block_markbad); +ALLOW_ERROR_INJECTION(mtd_block_markbad, ERRNO);
/* * default_mtd_writev - the default writev method