This improves the error code if BLKRRPART ioctl failed due to connection
issue.

Before:

        $ blockdev --rereadpt /dev/sda
        BLKRRPART: Invalid argument

After:
        $ blockdev --rereadpt /dev/sda
        BLKRRPART: Input/output error

Signed-off-by: Fam Zheng <f...@redhat.com>
---
 drivers/scsi/sd.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/scsi/sd.c b/drivers/scsi/sd.c
index 7e5ca3b..bb0e38d 100644
--- a/drivers/scsi/sd.c
+++ b/drivers/scsi/sd.c
@@ -2019,7 +2019,7 @@ static int read_capacity_16(struct scsi_disk *sdkp, 
struct scsi_device *sdp,
        if (the_result) {
                sd_print_result(sdkp, "Read Capacity(16) failed", the_result);
                read_capacity_error(sdkp, sdp, &sshdr, sense_valid, the_result);
-               return -EINVAL;
+               return -EIO;
        }
 
        sector_size = get_unaligned_be32(&buffer[8]);
@@ -2101,7 +2101,7 @@ static int read_capacity_10(struct scsi_disk *sdkp, 
struct scsi_device *sdp,
        if (the_result) {
                sd_print_result(sdkp, "Read Capacity(10) failed", the_result);
                read_capacity_error(sdkp, sdp, &sshdr, sense_valid, the_result);
-               return -EINVAL;
+               return -EIO;
        }
 
        sector_size = get_unaligned_be32(&buffer[4]);
-- 
1.9.3

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