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transport: fix segfault in transport select 

String compare against addresses in range 0 or so due
to not checking if there was an active session first.

Signed-off-by: Øyvind Harboe <oyvind.harboe@zylin.com>
This commit is contained in:
Øyvind Harboe 2010-07-07 14:56:56 +02:00
parent ccaa9edf29
commit daa02f7d84
1 changed files with 6 additions and 7 deletions
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3
src/jtag/transport.c
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@ -281,13 +281,12 @@ COMMAND_HANDLER(handle_transport_select)
return ERROR_FAIL; return ERROR_FAIL;
case 1: /* "select FOO" */ case 1: /* "select FOO" */
if(strcmp(session->name, CMD_ARGV[0]) == 0) { if ((session!= NULL) && strcmp(session->name, CMD_ARGV[0]) == 0) {
/* NOP */ /* NOP */
LOG_DEBUG("transport '%s' is already selected", LOG_DEBUG("transport '%s' is already selected",
CMD_ARGV[0]); CMD_ARGV[0]);
return ERROR_OK; return ERROR_OK;
} else { } else {
/* we can't change this session's transport after-the-fact */ /* we can't change this session's transport after-the-fact */
if (session) { if (session) {
LOG_ERROR("session's transport is already selected."); LOG_ERROR("session's transport is already selected.");