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Subject[PATCH 4.9 329/329] kdb: make "mdr" command repeat
Date
4.9-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Randy Dunlap <rdunlap@infradead.org>

[ Upstream commit 1e0ce03bf142454f38a5fc050bf4fd698d2d36d8 ]

The "mdr" command should repeat (continue) when only Enter/Return
is pressed, so make it do so.

Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Cc: Daniel Thompson <daniel.thompson@linaro.org>
Cc: Jason Wessel <jason.wessel@windriver.com>
Cc: kgdb-bugreport@lists.sourceforge.net
Signed-off-by: Jason Wessel <jason.wessel@windriver.com>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
kernel/debug/kdb/kdb_main.c | 27 +++++++++++++++++++++------
1 file changed, 21 insertions(+), 6 deletions(-)

--- a/kernel/debug/kdb/kdb_main.c
+++ b/kernel/debug/kdb/kdb_main.c
@@ -1564,6 +1564,7 @@ static int kdb_md(int argc, const char *
int symbolic = 0;
int valid = 0;
int phys = 0;
+ int raw = 0;

kdbgetintenv("MDCOUNT", &mdcount);
kdbgetintenv("RADIX", &radix);
@@ -1573,9 +1574,10 @@ static int kdb_md(int argc, const char *
repeat = mdcount * 16 / bytesperword;

if (strcmp(argv[0], "mdr") == 0) {
- if (argc != 2)
+ if (argc == 2 || (argc == 0 && last_addr != 0))
+ valid = raw = 1;
+ else
return KDB_ARGCOUNT;
- valid = 1;
} else if (isdigit(argv[0][2])) {
bytesperword = (int)(argv[0][2] - '0');
if (bytesperword == 0) {
@@ -1611,7 +1613,10 @@ static int kdb_md(int argc, const char *
radix = last_radix;
bytesperword = last_bytesperword;
repeat = last_repeat;
- mdcount = ((repeat * bytesperword) + 15) / 16;
+ if (raw)
+ mdcount = repeat;
+ else
+ mdcount = ((repeat * bytesperword) + 15) / 16;
}

if (argc) {
@@ -1628,7 +1633,10 @@ static int kdb_md(int argc, const char *
diag = kdbgetularg(argv[nextarg], &val);
if (!diag) {
mdcount = (int) val;
- repeat = mdcount * 16 / bytesperword;
+ if (raw)
+ repeat = mdcount;
+ else
+ repeat = mdcount * 16 / bytesperword;
}
}
if (argc >= nextarg+1) {
@@ -1638,8 +1646,15 @@ static int kdb_md(int argc, const char *
}
}

- if (strcmp(argv[0], "mdr") == 0)
- return kdb_mdr(addr, mdcount);
+ if (strcmp(argv[0], "mdr") == 0) {
+ int ret;
+ last_addr = addr;
+ ret = kdb_mdr(addr, mdcount);
+ last_addr += mdcount;
+ last_repeat = mdcount;
+ last_bytesperword = bytesperword; // to make REPEAT happy
+ return ret;
+ }

switch (radix) {
case 10:

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