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| author | Daniel Starke <daniel.starke@siemens.com> | 2022-08-31 09:38:00 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-09-22 16:05:00 +0200 |
| commit | c22d054f1ed6b3e990436c2dde7d3b7d6a170cff (patch) | |
| tree | c3354072399d947f6d3102cdae022849ebc6660c /drivers/tty | |
| parent | c07da737af4dd9a29508ae2863fa2afdec130088 (diff) | |
| download | linux-c22d054f1ed6b3e990436c2dde7d3b7d6a170cff.tar.bz2 | |
tty: n_gsm: add debug bit for user payload
A debug bit to output a complete transmission dump exists. Sometimes only
the user frames are relevant. Add an additional bit which limits the
transmission dump output to user data frames if set.
Signed-off-by: Daniel Starke <daniel.starke@siemens.com>
Link: https://lore.kernel.org/r/20220831073800.7459-6-daniel.starke@siemens.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/tty')
| -rw-r--r-- | drivers/tty/n_gsm.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/tty/n_gsm.c b/drivers/tty/n_gsm.c index e7ba15522215..5e516f5cac5a 100644 --- a/drivers/tty/n_gsm.c +++ b/drivers/tty/n_gsm.c @@ -69,6 +69,7 @@ module_param(debug, int, 0600); #define DBG_DATA BIT(2) /* Data transmission details. */ #define DBG_ERRORS BIT(3) /* Details for fail conditions. */ #define DBG_TTY BIT(4) /* Transmission statistics for DLCI TTYs. */ +#define DBG_PAYLOAD BIT(5) /* Limits DBG_DUMP to payload frames. */ /* Defaults: these are from the specification */ @@ -598,6 +599,10 @@ static void gsm_print_packet(const char *hdr, int addr, int cr, { if (!(debug & DBG_DUMP)) return; + /* Only show user payload frames if debug & DBG_PAYLOAD */ + if (!(debug & DBG_PAYLOAD) && addr != 0) + if ((control & ~PF) == UI || (control & ~PF) == UIH) + return; pr_info("%s %d) %c: ", hdr, addr, "RC"[cr]); |