i2cdump: display the numeric value for block read ioctl() errors
This makes busybox i2cdump compatible with the upstream version, which
also displays the numeric error value in case of a block read failure.
Signed-off-by: Bartosz Golaszewski <bartekgola@gmail.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
diff --git a/miscutils/i2c_tools.c b/miscutils/i2c_tools.c
index 7be4890..e19d851 100644
--- a/miscutils/i2c_tools.c
+++ b/miscutils/i2c_tools.c
@@ -732,8 +732,10 @@
tmp = i2c_smbus_read_i2c_block_data(
buf_fd, res, I2C_SMBUS_BLOCK_MAX,
cblock + res);
- if (tmp <= 0)
+ if (tmp <= 0) {
+ blen = tmp;
goto fail;
+ }
}
if (res >= I2CDUMP_NUM_REGS)
@@ -750,7 +752,7 @@
return blen;
fail:
- bb_error_msg_and_die("block read failed");
+ bb_error_msg_and_die("block read failed: %d", blen);
}
/* Dump all but word data. */