git: bd82711aff98 - main - cam: Remove trailing spaces from serial numbers too

The branch main has been updated by imp:

URL: https://cgit.FreeBSD.org/src/commit/?id=bd82711aff986b66e9fae60847a79d9db938a467

commit bd82711aff986b66e9fae60847a79d9db938a467
Author:     Warner Losh <imp@FreeBSD.org>
AuthorDate: 2021-11-05 14:56:41 +0000
Commit:     Warner Losh <imp@FreeBSD.org>
CommitDate: 2021-11-05 14:56:41 +0000

    cam: Remove trailing spaces from serial numbers too
    
    The SanDisk SD8SB8U1 and likely others pad their serial number with
    spaces on the end rather than the start (at least when connected to a
    SAS3008). This makes them difficult to wire unit numbers to with the
    serial because you have to specify the trailing spaces. Instead, strip
    out the trailing spaces.
    
    We already strip leading spaces both here. In addition, when glabel
    creates the devfs device nodes, leading and trailing spaces are removed
    already (so there will be no change there either).
    
    Sponsored by:           Netflix
    Differential Revision:  https://reviews.freebsd.org/D32684
---
 sys/cam/scsi/scsi_xpt.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/sys/cam/scsi/scsi_xpt.c b/sys/cam/scsi/scsi_xpt.c
index 6bcf95506963..77c47d578ae3 100644
--- a/sys/cam/scsi/scsi_xpt.c
+++ b/sys/cam/scsi/scsi_xpt.c
@@ -1615,6 +1615,14 @@ probe_device_check:
 					 */
 					slen = 0;
 				}
+				/*
+				 * In apparent violation of the spec, some
+				 * devices pad their serial numbers with
+				 * trailing spaces. Remove them.
+				 */
+				while (slen > 0 &&
+				    serial_buf->serial_num[slen - 1] == ' ')
+					slen--;
 				memcpy(path->device->serial_num,
 				       &serial_buf->serial_num[start], slen);
 				path->device->serial_num_len = slen;